hybridfree/eevblog-posts huggingface dataset:
LVDS termination - Page 1
Forum section: electronics / projects

author: cksa
author_rank: Regular Contributor
timestamp: January 23, 2012, 02:30:33 pm
content: Hi,I am trying to interface the Atlys Spartan 6 Dev board to an interface that is going to be spitting out LVDS signals (i.e. Spartan 6 is receiving data). However, when I look at the dev board (http://www.digilentinc.com/Products/Detail.cfm?NavPath=2,400,836&Prod=ATLYS), the termination resistors are in SERIES (50 ohms) with the LVDS line, and near the connector instead of the FPGA! In receive mode, I need a parallel 100 ohm resistor between the neg and pos LVDS pairs right near the FPGA.What can I do about this? Is this likely to cause a problem?

author: Rufus
author_rank: Super Contributor
timestamp: January 23, 2012, 02:59:38 pm
content: Looks to me like the I/Os on that board are not dedicated to LVDS or being inputs or outputs so the 50R resistors are likely a compromise.The Spartan 6 has optional internal 100 ohm termination on inputs configured for LVDS. Not hard to short out some of the 50R resistors or replace them with 0R0s if you need to.

author: joelby
author_rank: Frequent Contributor
timestamp: January 23, 2012, 09:13:24 pm
content: You can use series termination with LVDS. I use the Atlys for receiving LVDS signals and the 50R resistors don't cause any problems.
LVDS to PC video grabber suggestions - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: February 27, 2020, 11:30:52 am
content: Hi,what is the simplest way to capture into a PC the LVDS display signals (4 differential data pairs + clock as per attached schematic) driving a graphic display? I am thinking a small custom board to convert them into any format/standard that can be then grabbed with any cheap off-the-shelf grabber card/USB-module?To further explain...as per attached schematic the HDMI signals from a Compute Module are fed into TI's TFP401A (at the top left of the schematic) which then convert them into RGB to the feed them into SN75LVDS83B to generate the final LVDS output for the current graphic display I'm using.I have access only to the LVDS signals and need to feed them into a PC for live video grabbing.SN75LVDS83B datasheet attached. TFP401 is too large to be attached here so the link is:http://www.ti.com/lit/ds/symlink/tfp401a.pdf1) What is the simplest reliable solution?2) any limitations or potential pitfalls?Thank you all

author: ricko_uk
author_rank: Super Contributor
timestamp: February 27, 2020, 06:55:25 pm
content: Any suggestion... anybody...?Thank you
LVDS to PCIe bridge solution - Page 1
Forum section: electronics / projects

author: cblackburn
author_rank: Newbie
timestamp: March 24, 2021, 07:52:15 pm
content: Hi All,First time posting here after watching the YouTube series for ages. It's good to find a corner of the internet filled with like minded EE GeeksI've got a problem with a board I'm designing that I was hoping you guys might give some insight into. I have a chip which is generating ADC data at a fast rate and sending that data over an LVDS link. Specifically, there are 8 pins in 4 differential pairs. Two pairs are data and the other two are clock and "frame clock". I have attached a cutout of the datasheet for clarity. These are clocked at up to 450MHz DDR (so 900 Megabits). I need to get this data into our controller so I can send it on/process it. We are aiming for a Raspberry Pi CM4 as our host computer so the only interface I have that's fast enough for this would be the PCI Express Gen 2 1x link. This means I need something which can take the LVDS in and act like a PCIe device which can forward the data onto the host.Now, the usual answer for something like this would be "use an FPGA". But, before I go down that rabbit hole this feels like the sort of thing where there *might* be a single chip (or collection of chip) off-the-shelf solution that I could use. I always try to follow the old adage of not reinventing the wheel. Despite much Googling I've not been able to turn up anything so, does anyone have experience with this? Or, is it time to fire up the VHDL?If I am going down the FPGA route what would people recommend as a chip which would be "just enough" to accomplish this (as always, beancounters are asking to keep the BOM cost down). It's been a while since I was in the FPGA space, back then it was "Xilinx all the way" but I hear good things about Lattice Semi and a few others.Thanks for your helpChris

author: mvs
author_rank: Frequent Contributor
timestamp: March 25, 2021, 11:39:15 am
content: Perhaps you can use CSI2 interface of RPi for your task. The documentation is however under NDA (Broadcom).

author: cblackburn
author_rank: Newbie
timestamp: March 25, 2021, 11:55:08 am
content: Thanks mvs, that's not a bad idea at all. Some research would indicate that CSI is basically LVDS but with some specific data layer framing requirements. I am able to influence the LVDS data structure so this might work.Unfortunately, to get hold of the MIPI CSI-2 standard documents you have to pay a minimum of $8,000 per quarter! Yikes. Hopefully I can piece together enough information through googling and/or experimentation.Chris

author: amyk
author_rank: Super Contributor
timestamp: March 25, 2021, 01:13:17 pm
content: Code:MIPI Alliance Specification for CSI-2Search for that and you will be enlightened
M.2 patch to usb 3.0/Sata macgyver style - Page 1
Forum section: electronics / projects

author: RadiantRob
author_rank: Newbie
timestamp: January 06, 2020, 02:35:21 am
content: This is more of a 'can I do it?' sort of project... Although, I'm hoping to benefit from it if it works.I have:Kobo Arc 10HDExternal M.2 SSD adapter to USB 3.0 (without the SSD)Parts from a motorola DCX3510 and a billion other devices i can take parts from me.Sata hard drives, including 1 fully external drive with USB 3.0What I want to do:Use my Kobo as a NAS (ftp) for my little home networkThe Kobo has a USB2.0 port and a miniHDMI port. I want to attach the external HD to the Kobo (and still power the kobo), but I want to bypass its USB 2 port. I have a few strategies and not enough knowledge. I have some electronics background.I would love to hear ideas!
M.2 SSD Power Estimation Help? - Page 1
Forum section: electronics / projects

author: bhj99
author_rank: Contributor
timestamp: April 27, 2023, 12:39:46 am
content: Hello all, I am working on a rear transition module (RTM) design that involves an M.2 SSD to be used as a boot drive for a single board computer (SBC) that it will interface with.The SSD of interest is the 1 TB Western Digital M.2 2280 TLC SSD, Part Number SDBPNPZ-1T00-XI, where the product brief can be located here:https://www.mouser.com/datasheet/2/669/product_brief_western_digital_ix_sn530_nvme_ssd-1923481.pdfIn terms of power specs, the datasheet says an average power of 3.5 W and a peak power of 5.5 W (supply voltage is 3.3 V), where the test methodology is specified in the footnotes. I have a PCB power allocation of 8 W max for my entire PCB design, so the 5.5 W number is concerning to me (even for short durations).I'm wondering if anyone on this forum can offer alternative ways to derive typical and max power estimates to be used for thermal analysis? My thinking is that power consumption is primarily driven by PCIe data rate, read and write powers. My application of the SSD would be to run full throttle for short bursts, and the SSD would be idle for the majority of the time. Perhaps I would need to quantify boot durations for the SBC in order to assess temperature rise? Does anyone think throttling/lowering the PCIe data rate or using fewer lanes would help with power consumption? I would really appreciate any feedback on this!
M-Audio Audiophile USB | reverse engineering | drivers OS X - Page 1
Forum section: electronics / projects

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: May 10, 2017, 09:51:08 am
content: Dear forum,lately I wanted to reactivate my trusty old M-Audio Audiophile USB interface. However, driver support was dropped back in the day with OS X 10.7. I am wondering, if there might be options to get the device back in business.ICs as identified (red boxes top to bottom)Cirrus Logic CS8427-CSZ96kHz transceiverTexas Instruments TUSB3200CUSB streaming controllerAKM AK4528VF24bit 96kHz audio codecMicrochip 24LC6464K I2C Serial EEPROMPhilips 74HCT00DQuad 2-input NAND gateDoes anyone of you know of an all-purpose driver that might work for OS X 10.11 or can give me some pointers to what I would have to go through to write my own driver package?Thanks and best regards,Frederik

author: Fungus
author_rank: Super Contributor
timestamp: May 10, 2017, 11:40:13 am
content: What do you intend to use it for? If it's just for listening then you can get something new for $12.

author: Cervisia
author_rank: Regular Contributor
timestamp: May 10, 2017, 11:49:16 am
content: The Linux driver should have all the workarounds needed. Does it work there?

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: May 10, 2017, 12:13:02 pm
content: I had it working on a Linux machine some years back, but I don’t see that there are options to cross-compile ALSA on OS X.Intended use is Audio input and Midi In/Out.

author: Cervisia
author_rank: Regular Contributor
timestamp: May 10, 2017, 12:22:16 pm
content: I was implying that you could start with a standard-compliant USB audio driver, and copy the workarounds from the Linux driver.This assumes that you do have experience writing OS X drivers, so it's probably not helpful.But I don't see any other alternative.

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: May 10, 2017, 12:47:46 pm
content: OK, now I get it. Don’t think I am going that deep into the rabbit holeAfter some fiddling with the old 10.7 drivers and "manual wiring" I got some basic output working, but there are a compression artefacts / aliasing / sample rate mismatch / ?. That is at least a step forwards xD.Maybe I can figure out the rest
M-Bus Master Design for more than 100 Slaves  - Page 1
Forum section: electronics / projects

author: Flamador
author_rank: Newbie
timestamp: October 01, 2020, 02:38:30 pm
content: Hi. I need to read M-bus slave devices. There is 100 or maybe 250 slave devices. I want to convert this m-bus protocol to rs232 to read on MCU. How can I design this circuit ?

author: Renate
author_rank: Super Contributor
timestamp: October 01, 2020, 07:22:32 pm
content: M-Bus a/k/a Meter-Bus is a European standard for energy consumption monitoring that they'll tell you is EN12345678, but not what it is.TL/DRIt's a two wire system.The master transmits by modulating between 36 V and 24 V across the wires.The slaves respond by consuming 11 mA to 20 mA for a zero and less for a one.Data runs up to 9600 baud, default 2400 baud.Presumable you would need a driver supply for master and a current sense for the slaves.The interface would be either 3.3 V or 5 V UART signal (not particularly "RS-232").250 units on a wire drawing less than 10 mA would have to be doing < 40 µA each.I guess that they'd accept a higher baseline current and simply look for an increase of 10 mA?

author: Renate
author_rank: Super Contributor
timestamp: October 03, 2020, 12:00:10 pm
content: Does this installation already have a master driving it?Or is it new and it's not even powered?You're going to have to do some experimenting.The first thing I'd do is hook acurrent-limited24 V supply (with the right polarity) to these sensors and see what the quiescent (baseline) current is.

author: MarkL
author_rank: Unknown
timestamp: October 03, 2020, 02:34:53 pm
content: Take a look here:https://github.com/rscada/libmbusIn the "hardware" directory you will find a schematic for an m-bus master. It incorporates a PL2303 USB to serial converter but you can get rid of that if you want to drive it directly from your micocontroller.In looking at the circuit it may not have the capability to drive 250 devices, but maybe it can give you a start. You can try it in a circuit simulator.The library works fine; I've used it.More documentation on the physical and higher level is athttps://m-bus.comif you haven't already found it.
M12A-5 TEE adapter nightmare - Page 1
Forum section: electronics / projects

author: Simon
author_rank: Unknown
timestamp: May 14, 2025, 09:05:51 am
content: I decided to use NMEA 2000 on M12A-5 connectors/cables going forward. Seems to be the unspoken standard in many other fields too. so I order a TEE piece so that I can tap into the network with my USB CAN bus adapter. Well the two devices talk to each other but the USB adapter just would not work. So after probing around I discover that the TEE adapter I got rewires the pinout. Only 2 of the pins "pass through" and the others are joined together in the same connector.So I start looking around and find that all M12A-5 TEE adapters do this. What is going on? Obviously there is some standard, not the one I thought though.

author: eutectique
author_rank: Frequent Contributor
timestamp: May 14, 2025, 10:36:22 am
content: Is your tee piece a power tap, by any chance? You would only have power lines in this case.

author: Simon
author_rank: Unknown
timestamp: May 14, 2025, 04:59:34 pm
content: No, I think it comes under sensors or something like that that M12A connectors are commonly used for. Something like pins 1 and 3 pass through but 2 and 4 are joined together. Seems the best place for NMEA 2000 stuff is not RS but Amazon!
M2 Key M dwg form factor and 3D models - Page 1
Forum section: electronics / projects

author: electronx
author_rank: Regular Contributor
timestamp: February 19, 2025, 07:28:00 am
content: I am looking for form factor and 3d model for m2 keym ssd (it will look cooler in my altium project if the 3d model is provided directly by the vendor)Any idea?
M202LD08A Connector unknown - Page 1
Forum section: electronics / projects

author: SaabFAN
author_rank: Frequent Contributor
timestamp: October 06, 2015, 01:13:42 pm
content: Can anyone identify this connector on the M202LD08A I just got?It looks similar to an ATX-Connector, but is smaller. Google-Searches haven't turned up anything useful yet. All the sites I found so far deal with the pinout and how to connect the module, but none tells the type of the connector.

author: ovnr
author_rank: Frequent Contributor
timestamp: October 06, 2015, 01:33:15 pm
content: 95% sure it's a Molex Micro-Fit 3.0.Here's the mating connector- remember to buy pins too.

author: SaabFAN
author_rank: Frequent Contributor
timestamp: October 06, 2015, 01:52:22 pm
content: thx!
M205 glass fuse S-clip to piggyback a soldered in fuse? - Page 1
Forum section: electronics / projects

author: noidea
author_rank: Unknown
timestamp: November 27, 2013, 02:29:57 pm
content: Hi AllHas anyone ever seen or can point me in the direction to source a small S-shaped fuse holder clip that allows you to piggy back a soldered in M205 fuse that has blown with a standard M205 fuse?The picture in the link below speaks a thousand more words than I can describe.http://www.earlytelevision.org/Deksnis/ct-100_restoration_log_fuseclips.htmlI am a HVAC tech with a vague understanding of electronics and on some of the inverter air con's that I work on the genius who designed them decided to use a soldered fuse in a place that really should have been a replaceable one. It frustrates me to change a board when only the fuse has blown. I have looked at buying pigtail lead fuses and then soldering in new fuses but they seem to be a difficult to find item in Australia. If I could find something like this it would save me time and the customer money which is always a good thing.
M24256-DFCS6TP/K serial EEPROM unreliable - Page 1
Forum section: electronics / projects

author: davide.b
author_rank: Newbie
timestamp: November 28, 2017, 03:27:18 pm
content: Hello everyone,I have been working at a design for a product that features the M24256-DFCS6TP/K I2C EEPROM by ST in the WLCSP packaging. A batch of PCBA were ordered from a company. When I started programming the boards, I noticed that the EEPROM did not work correctly on some boards. That is to say, while on some boards the code I wrote works well and I am able to read from and write to the EEPROM, on some other boards the write operation fails while the read operation is fine and on some other boards I can neither read or write.After some investigation, I was able to exclude PCB manufacturing issues and bad soldering issues.Has anyone had the same problem with this kind of package? Do you know what could be the cause of such an unreliable performance across multiple boards? Maybe some particular heat curve in the reflow process is necessary? Maybe some special layout requirements?The space on the PCB is quite tight, but maybe I could fit the UTDFN package instead. Would you think that is going to be more reliable?
M3214 Seiko Panel - Page 1
Forum section: electronics / projects

author: SignalArray
author_rank: Contributor
timestamp: April 29, 2020, 08:04:47 pm
content: I want to make a display for Arduino using the character panel M3214 made by Seiko.There are 8 drivers on board of this panel. PN of driver chip is D7227G made by NEC. The panel supply is 5V and there is no backlight.Does anyone have a link for datasheet for this display panel?I can find a driver datasheet athttps://datasheet4u.com/datasheet-parts/UPD7227-datasheet.php?id=569233. But, I cannot find the display panel datasheet anywhere online.
M5236L linear regulator help - Page 1
Forum section: electronics / projects

author: nettron101
author_rank: Newbie
timestamp: February 21, 2024, 04:28:20 am
content: Is it possible to replace the pass transistor with a relay ?Attached is a clip from the data sheet showing a standard circuit app.

author: ejeffrey
author_rank: Super Contributor
timestamp: February 21, 2024, 04:55:33 am
content: No you can't use a relay as a pass device in a linear regulator.

author: DavidAlfa
author_rank: Super Contributor
timestamp: February 21, 2024, 04:57:58 am
content: No! That transoistor is being regulated by the main regulator, not on/off.

author: nettron101
author_rank: Newbie
timestamp: February 21, 2024, 05:17:35 pm
content: Thanks guys, i was thinking the same but was hoping there was s way of modifying it so it could ? Or just go with a shunt type regulator instead ?

author: DavidAlfa
author_rank: Super Contributor
timestamp: February 21, 2024, 06:32:35 pm
content: Why? Do you really understand what is it doing?

author: srb1954
author_rank: Super Contributor
timestamp: February 21, 2024, 07:51:54 pm
content: Quote from: nettron101 on February 21, 2024, 05:17:35 pmA shunt regulator would not be suitable to replace an LDO regulator such as this unless you are prepared to waste a lot of power.You might be able to replace the whole circuit with a more modern LDO regulator chip but with output voltages of 12V or higher the availability of suitable chips becomes quite limited.

author: nettron101
author_rank: Newbie
timestamp: February 21, 2024, 10:33:51 pm
content: No not to to be used on its own but rather use it to control a transistor which turns on a relay. Reason i'm asking is cause a have a circuit that uses a TL431 shunt regulator to monitor the charge on a 12 volt battery and supposedly disconnects the battery when it reaches full charge. Apart from that I drew up a schematic of a battery monitor circuit a few weeks ago that uses a regular BJT transistor to switch the relay. The design is based on a circuit i saw online a while ago so not exclusively my design, i can also attach that design if anyone is interested in giving their analysis ?Attached is the schematic of the TL431 battery monitor ( not my design )
M5StampS3 microcontroller - Page 1
Forum section: electronics / projects

author: BILLPOD
author_rank: Frequent Contributor
timestamp: February 09, 2024, 06:22:44 pm
content: I recently received my daily advertisement from Aliexpress, and one of the items 'On Sale' was aM5StampS3 microcontroller. I've never heard of such a thing, so I asked Uncle Google, and even he didn't offer much info on it, mostly sites that were selling it for anywhere from $29 to $50.I even searched the entire EEVBLOG forum and found nothing. What are these things and what are they capable of?....anyone know???

author: Ian.M
author_rank: Super Contributor
timestamp: February 09, 2024, 06:55:56 pm
content: Your googlefu is lacking.https://docs.m5stack.com/en/core/stamps3Its an ESP32, with 8MB Flash and 23 I/Os

author: BILLPOD
author_rank: Frequent Contributor
timestamp: February 09, 2024, 08:12:48 pm
content: Thanks Ian, but the device I was referring to has 56 buttons/keys, and a small displaywindow. Try this:https://linuxgizmos.com/pocket-size-computer-based-on-m5stamps3-microcontroller/

author: Ian.M
author_rank: Super Contributor
timestamp: February 09, 2024, 08:20:32 pm
content: Didn't you see the Wiki link in the 'Further information' section of the page you just linked?https://docs.m5stack.com/en/core/CardputerMy crystal ball must be out of order as from your original post I had no idea you wanted info on the 'Cardputer' kit.

author: BILLPOD
author_rank: Frequent Contributor
timestamp: February 10, 2024, 02:17:58 pm
content: No Ian, I completely missed the WIKI link, (thanks for that heads-up).I guess what I am looking for is some kind of feedback from someone who has used one, as the description of the item is intriguing, even though it is probably more of a 'toy' than a useful piece of technology that is "made for engineers". It's not expensive, so maybe I'll order one and satiate my curiosity. Thank again, Ian.
M74HC595 vs CD4094BC - Page 1
Forum section: electronics / projects

author: nardev
author_rank: Unknown
timestamp: November 26, 2012, 09:34:58 pm
content: Can somebody pls help me to match pins on these two IC'sAs far as i see, these two IC's are very similar one to another, both 8 bit shift registers, WITH OUTPUT LATCHES (3 STATE)I need to know what pin [1-16] in M74HC595 matches what pin [1-16] in CD4094BC.I have problems identifying pins STROBE, DATA, CLOCK, OUTPUT ENABLED, Q's, QsHere you can find data sheets:M74HC595:http://www.datasheetcatalog.org/datasheet2/c/0hek9e6rpc50aywfc8085prha4cy.pdfCD4094BC:http://www.jaycar.com.au/images_uploaded/CD4094BC.PDFThank you

author: westfw
author_rank: Super Contributor
timestamp: November 27, 2012, 01:10:25 am
content: The CD4094 has a much wider supply voltage range, and is much slower (min max clock about 1MHz vs 5MHz.) Whether 1MHz is "fast enough" is a separate question...

author: c4757p
author_rank: Super Contributor
timestamp: November 27, 2012, 02:05:44 am
content: STROBE = RCK, CLOCK = SCK, Output enable = G (but is active HIGH on the 4094 and active LOW on the 595). The behavior of STROBE is subtly different though - on the 595, all output propagation and latching is done on the rising edge of RCK. On the 4094, it seems (I've never used it before, but according to the datasheet) that data islatchedon the falling edge, thenpropagatedto the outputs on the rising edge. So you need a full pulse, whereas with the 595 you just need an edge.

author: c4757p
author_rank: Super Contributor
timestamp: November 27, 2012, 02:10:50 am
content: The datasheet is your friend, and not just the pinout. Look at the block diagram, look at the timing diagram (yeah, I know, they suck, but there is information there that you won't see elsewhere), and readallthe text.

author: nardev
author_rank: Unknown
timestamp: November 27, 2012, 06:50:48 am
content: @c4757p thank you very much.westfw, both would suite my needs

author: Kremmen
author_rank: Super Contributor
timestamp: November 27, 2012, 06:54:04 am
content: Then take the 595. The polarities of its signaling are sucjh that you can combine the output strobe/clock and enable into one signal unless you specifically need them separate. Than simplifies the circuit a little bit. I always use 595s in display and key scanners and it has yet to fail me

author: nctnico
author_rank: Super Contributor
timestamp: November 27, 2012, 07:42:35 am
content: TI and ST have chips called TPIC6x595 (x=B, C depending on the current rating) which are open drain versions of the HC595. As an extra feature the reset pin on these chips also reset the output register.
M8 constant current electronic load the V6 version discharger - Page 1
Forum section: electronics / projects

author: TheAmmoniacal
author_rank: Unknown
timestamp: September 02, 2014, 09:42:04 am
content: I'm looking for a cheap small device that would let me test the full capacity of my batteries/battery pack. I'd love to have a real electronic load, but considering I already have a datalogging multimeter (and not much money), a simple constant-current load would be fine. While looking around I found this small circuit:http://www.aliexpress.com/item/Free-shipping-new-M8-constant-current-electronic-load-the-V6-version-discharger-discharger/1158031597.htmlhttp://www.ebay.com/itm/new-M8-constant-current-electronic-load-the-V6-version-discharger-discharger-/321216410343?pt=LH_DefaultDomain_0&hash=item4ac9fd72e7From what I can understand this circuit seems to be exactly what I want, but I can't entirely understand what it does or how it works. I'd like to ask if any of you understand more of what this circuit does, and if it works for my needs?As far as I can understand, the device allows me to connect a dummy load and my battery, but how would it draw a constant current from that? Does it boost the voltage to match my load's resistance?Any more explanation would be helpful, thanks.

author: cowana
author_rank: Frequent Contributor
timestamp: September 02, 2014, 11:06:33 am
content: The three terminal device mounted on flying wires is a K1450 N Channel MOSFET. This is connected across the supply, and the controller sets the gate voltage to ensure the desired current is drawn (and thus dissipated in the MOSFET). This means the MOSFET will get very hot - and certainly need to be mounted on a large (and possibly fan cooled) heatsink for anything but the smallest (<1W) of discharges.Andy

author: TheAmmoniacal
author_rank: Unknown
timestamp: September 02, 2014, 11:11:55 am
content: If that's the case it won't be very useful, I'm thinking of dissipating in the order of 40-70 W.

author: cowana
author_rank: Frequent Contributor
timestamp: September 02, 2014, 11:30:17 am
content: If you mount the MOSFET on a computer's CPU heatsink along with a fan, you shouldn't have any issues is dissipating that sort of level of power from it.
Mac8 alternative for their seemingly unique offerings? - Page 1
Forum section: electronics / projects

author: bugrobotics
author_rank: Regular Contributor
timestamp: October 25, 2022, 06:45:41 pm
content: I've used Mac8 (www.mac8usa.com) a few times in the past for some of their unique offerings. Now due to 6+ month leads I'm looking at alternatives.Stuff like this:Terminals for wire managementhttps://mac8usa.com/product/terminal-for-fitting-bundled-wire-band-side-face-type/M5 threaded SMT nutshttps://mac8usa.com/product/through-hole-tap-m5-type/Any alternatives out there? I will machine the M5 SMT parts if need be and then have them plated but was hoping to get another source. The wire management parts are nice but not absolutely necessary in this project.

author: bugrobotics
author_rank: Regular Contributor
timestamp: October 25, 2022, 07:10:55 pm
content: Update:Found a Wurth product from the Redcube line:https://www.we-online.com/catalog/en/WP-SMBU_THROUGH-HOLEAvailable from the major distributors. Labeled as a "terminal" (https://www.mouser.com/ProductDetail/Wurth-Elektronik/7466005R?qs=lBTPRtX1sU9OrmcTuT9vLw%3D%3D)

author: bugrobotics
author_rank: Regular Contributor
timestamp: October 25, 2022, 07:37:40 pm
content: And found another M5 threaded spacer from Wurth...5331006030.

author: Someone
author_rank: Super Contributor
timestamp: October 26, 2022, 12:01:46 am
content: Wurth would have been my first thought. If you go bigger volume than x,000 units its over to custom.

author: aeg
author_rank: Regular Contributor
timestamp: October 27, 2022, 03:56:53 am
content: Keystone is another option, but the biggest they go is M4, and less inventory of M4 than smaller sizes.
Machine Vision Development Systems - Page 1
Forum section: electronics / projects

author: XMAN23
author_rank: Newbie
timestamp: February 24, 2017, 12:50:39 am
content: I'm looking to design a free standing machine vision. I'm looking for a entry level development system and tools. Do you guys have any suggestions of what to look at.Thanks for any helpTom

author: nctnico
author_rank: Super Contributor
timestamp: February 24, 2017, 01:02:52 am
content: OpenCV (both the book and the programming library).
Machinery you use at your work - Page 1
Forum section: electronics / projects

author: SeanB
author_rank: Super Contributor
timestamp: June 04, 2012, 05:58:39 pm
content: Thought it might be interesting to see machinery you use around your work.http://youtu.be/JIGGKDVaZrU

author: codeboy2k
author_rank: Super Contributor
timestamp: June 04, 2012, 06:36:13 pm
content: huh? where do you work?

author: ftransform
author_rank: Frequent Contributor
timestamp: June 09, 2012, 08:44:34 pm
content: sir may I buy some disco biscuits from you?

author: Bored@Work
author_rank: Super Contributor
timestamp: June 09, 2012, 11:49:51 pm
content: Real men use thisat work.Welcome to worker's paradise.

author: SeanB
author_rank: Super Contributor
timestamp: June 10, 2012, 08:40:24 am
content: Very safe, and the operators get exercise every stroke. Now I know how those cheap leaky bowls were made. Thinnest metal that would survive the press.
Made a 5V source with LM22675-ADJ but it had coil whine - Page 1
Forum section: electronics / projects

author: Velth
author_rank: Contributor
timestamp: September 12, 2022, 02:12:18 pm
content: Hello guys I made two boards and my 5v using the lm226 it's making a coil whine , that don't affects my board but it's annoying, I already tried to change the inductor but no improves. I'm using a 27uH 1.9A, I use this scheamtic before and no problems, I would really like suggestions to make and fix for my final board.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 12, 2022, 02:16:59 pm
content: Are you sure it's the coil and not a ceramic capacitor?

author: AndyC_772
author_rank: Super Contributor
timestamp: September 12, 2022, 02:28:13 pm
content: What's the switching frequency? Is it stable? What does the waveform look like at each end of the coil, and what are the audible frequency components?

author: Velth
author_rank: Contributor
timestamp: September 12, 2022, 02:45:41 pm
content: Hello thank you so much for replying me, the problem was the ceramic capacitor, I changed to a PTH and no more noise.Can someone explain me why ? Never see this before.

author: coppercone2
author_rank: Super Contributor
timestamp: September 13, 2022, 05:42:28 am
content: a ceramic capacitor makes noise like a inductor but with electric fieldit is like resonating at the frequency of the field inside due to size. you could probobly change size too, it might make the noise less, maybe. it might be like a tuning fork

author: james_s
author_rank: Super Contributor
timestamp: September 13, 2022, 05:48:50 am
content: Are you sure the IC is genuine? There are some LMxxxx switcher ICs that are not what they claim to be and operate at the wrong frequency.
Made a 9V power supply board without switch control - Page 1
Forum section: electronics / projects

author: daisizhou
author_rank: Super Contributor
timestamp: March 15, 2021, 12:52:37 pm
content: Multimeters or common handheld devices use 9V batteries.Because of the rush, I often forget to turn off the power,Cause the battery to run out.There are many 18650 rechargeable lithium batteries on hand.So I have the idea of making 3.7V-4.2V voltage conversion 9V voltageThe highlight of this board is that there is no need to use a switch to control the DCDC conversion,Completely replace the 9V batteryI will post it and provide it to friends in need

author: mariush
author_rank: Super Contributor
timestamp: March 15, 2021, 06:58:23 pm
content: MC34063 is a switching regulator IC, so basically you're making a switching power supply, which can introduce noise in the circuit. Not to mention it also requires A LOT of parts.Since the multimeter doesn't consume A LOT of current, you could fake a 9v battery by simply using a ratiometric converter, a voltage doubler IC.So you get 3.7v...4.2v doubled, minus maybe 1-2 diode drops ... so you get around 7v..8v ... pretty much anything will work with this voltage, as 9v batteries will provide useful power down to around 5.5v..6vFor example, LM2665 regulators are 0.6$ each and all you need is a diode and 2 ceramic capacitors to get it working:LM2665 :https://www.ti.com/lit/ds/symlink/lm2665.pdfMAX1720 :https://www.onsemi.com/pdf/datasheet/max1720-d.pdfSee page 9 for example circuit ... you need 3 ceramic capacitors and 2 diodes ... which will be a bit more voltage drop.and here's a whole bunch of other chips including through hole ones (DIP) that should work (max current and max input voltage may vary) :https://www.digikey.com/short/j537qztr
Made a hi-res pressure sensor matrix foil from cheap materials - Page 1
Forum section: electronics / projects

author: baltersice
author_rank: Regular Contributor
timestamp: September 19, 2017, 02:56:53 pm
content: Cheap being a relative term ... Paid ~ 300 EUR for all the copper tape, but commercial units with lower resolution cost thousands.Generally an interesting project, that I though was worth a video

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 19, 2017, 03:42:38 pm
content: Maybe capacitive sensing across a non-conducting soft material could be a better option.Someone at the Hackaday Unconference last weekend showed this for pressure sensing in shoes to assist people with balance problems

author: baltersice
author_rank: Regular Contributor
timestamp: September 19, 2017, 04:49:52 pm
content: Thought about that too! With a good uniform 'rubber' mat that compresses proportionally to weight I could just measure capacitance between both sides. But that's about as far as that idea went. Because I have no idea how that could be done economically.Probably with vertical and horizontal stripes too? And then something ACish to one of 180 cols to measure miniscule ACish voltages on all rows?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 19, 2017, 05:05:30 pm
content: There are plenty of capsensing solutions out there - may even be cheapest to have one chip per zone based on how many sensing lines it can deal with, and tile these as necessary. maybe just have sensing on one side to a common groundplane.The nice thing about capacitance is it can be completely sealed from the compression medium so not rely on electrical contact, and the compression medium is probably going to be cheaper, and you have a much wider choice of materials.

author: kosine
author_rank: Regular Contributor
timestamp: September 19, 2017, 05:27:42 pm
content: Could have been a nice application for quantum tunneling composite, but it never seems to have been made widely available. (https://en.wikipedia.org/wiki/Quantum_tunnelling_composite) Used to be about 50p per 4x4x1mm "pill" in the UK, but no longer seems available.Really cool stuff, just basically nickel filaments in a rubber binder. Resistance goes from near infinity to near zero with fingertip pressure. I think the original patents must have expired by now, so maybe it'll get a renaissance.You can make a poor man's version with iron filing and latex, but you need to align the filings vertically with a magnet whilst the latex cures. (I've had reasonable success with a few seconds in a microwave.) Not as good as the QTC, and it rusts over time.
Made a new version of the µRuler - Page 1
Forum section: electronics / projects

author: DutchGert
author_rank: Frequent Contributor
timestamp: March 02, 2015, 10:29:02 am
content: Since I never got a chance to buy a µRuler and felt creative last weekend I decided to make a new version of the µRuler. Used the old one for inspiration and cleaned it up so it looks more neat (in my opinion. Also, its more 'metric oriented' this time.Two actually because I couldn't decide what version I liked the most.Dave, if you are interested at doing another campaign u can have the design. Otherwise ill think about doing a campaign or something if people are really interested.Update: for now it's a single sided 'board', if anyone has a good suggestion what to do with the other side feel free to make a suggestion. I was thinking of doing a bunch of packages but don't really know if my libraries are 100% IPC.

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2015, 10:57:26 am
content: We're all waiting for Dave to get Seppy on to this project:https://www.eevblog.com/forum/projects/new-uruler/msg512253/#msg512253But maybe you will finish yours first.Quick copy his before he copyrights it.

author: EEVblog
author_rank: Unknown
timestamp: March 02, 2015, 11:00:47 am
content: Quote from: tautech on March 02, 2015, 10:57:26 amFunny how many people already have my new µRuler!

author: EEVblog
author_rank: Unknown
timestamp: March 02, 2015, 11:02:20 am
content: Quote from: DutchGert on March 02, 2015, 10:29:02 amThanks, but I've had a new design for a long time now, and many people already have it. Just haven't gotten around to offering for general sale yet.https://www.eevblog.com/forum/projects/new-uruler

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2015, 11:10:29 am
content: Quote from: EEVblog on March 02, 2015, 11:00:47 amThats nice...selective who you offer them to ?Supporters first I suppose?

author: EEVblog
author_rank: Unknown
timestamp: March 02, 2015, 11:14:12 am
content: Quote from: tautech on March 02, 2015, 11:10:29 amIf you came to the Electronex show you would have got some as free swag.

author: tautech
author_rank: Super Contributor
timestamp: March 02, 2015, 11:19:56 am
content: Quote from: EEVblog on March 02, 2015, 11:14:12 amI'll put that on my "to do" list.
Made a nice "home" for my Efratom LPRO-101... - Page 1
Forum section: electronics / projects

author: TurboTom
author_rank: Super Contributor
timestamp: July 06, 2017, 07:46:08 pm
content: A long time after my surprisingly successful repair of my LPRO101 (see here:https://www.eevblog.com/forum/repair/repair-lpro-101-no-lock/msg848289/#msg848289), I finally managed to design some surrounding circuitry to make a full 10MHz frequency standard with it. Since I intend to run several instruments from its output, I opted for five isolated (to avoid ground loops), +7dBm (approx. 500mVeff) sine outputs and three fast-edge square outputs of 5V, 3.3V and 2.5V peak amplitude.A friend of mine helped me with a nice front panel and some other parts, and since he owns one of these rubidium oscillators as well, we directly built two such units. The enclosure is just big enough to contain everything but provides sufficient cooling since it's made of extruded aluminium.The LPRO101's outputs a pretty clean sine wave, harmonics are more than 50dB below the fundamental, much better than other Rb oscillators I've seen. I included a small circuit to automatically generate a 50% duty cycle square from the sine wave and as well fast drivers for several common digital voltage levels. Actual rise times are probably in the ballpark of 500ps, considering my MSO4**4reads round about 800ps, but the scope will also add some delay.FYI, I attached a few photos and the schematic. If someone's intending to duplicate this, I may add the required information.Cheers,Tom

author: HighVoltage
author_rank: Super Contributor
timestamp: July 06, 2017, 07:53:29 pm
content: That looks very nice.You could probably see these kits well.
made boxall templates - Page 1
Forum section: electronics / projects

author: LaserTazerPhaser
author_rank: Regular Contributor
timestamp: July 08, 2019, 12:21:29 am
content: Aidetek doesn't provide templates and they didn't reply to the email I sent which has these attached.

author: Domagoj T
author_rank: Frequent Contributor
timestamp: July 08, 2019, 06:03:09 am
content: What file type is that? I don't see any extension.

author: LaserTazerPhaser
author_rank: Regular Contributor
timestamp: July 08, 2019, 06:08:07 am
content: Updated attachment archive. They are libreoffice writer documents they work fine without suffix on gentoo along with many other file types.

author: Domagoj T
author_rank: Frequent Contributor
timestamp: July 08, 2019, 06:18:10 am
content: Works now.

author: LaserTazerPhaser
author_rank: Regular Contributor
timestamp: July 08, 2019, 06:21:13 am
content: Would be nice if borders can be made visible but not printed.
Magic Eye Tube Tester - Page 1
Forum section: electronics / projects

author: KD4CCF
author_rank: Contributor
timestamp: August 15, 2019, 08:22:41 pm
content: Here's my quick hack for making a Magic Eye tube Tester.Saves the drudgery of building circuit boards, and at a very low cost.https://youtu.be/OeVBEvgxMGQBe nice!

author: chris_leyson
author_rank: Super Contributor
timestamp: August 15, 2019, 08:53:37 pm
content: Neat, would be nice to add a B9A socket for EM84 and EM87.

author: David Hess
author_rank: Super Contributor
timestamp: August 16, 2019, 04:01:04 am
content: The general tube testers I have used could all test magic eye tubes as well.
Magic LEDs - Page 1
Forum section: electronics / projects

author: wholder
author_rank: Regular Contributor
timestamp: December 07, 2018, 12:30:14 am
content: I've posted a YouTube video that shows how to program an Arduino to “Magically” switch an LED on and off by shining a keychain light at it.The video describes how the technique works for one LED as well as for a set of 8 LEDs, each of which can be switched on and off independently. There also a bonus effect shown at the end of the video. Complete source code is available for all 4 examples and can be downloaded from a web page that’s linked in the description for the video. Enjoy!Wayne

author: chris_leyson
author_rank: Super Contributor
timestamp: December 07, 2018, 01:28:51 am
content: Thanks Wayne that's really neat. It would never have occurred to me to use a LED's junction capacitance to measure ambient light so I've learnt something new today, thanks. Given your YouTube video a thumbs up.

author: cdev
author_rank: Super Contributor
timestamp: December 07, 2018, 01:52:19 am
content: Miraculoso!
Magnec flux sensor tear down - long and boring video ... - Page 1
Forum section: electronics / projects

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: March 02, 2015, 09:44:29 pm
content: I have made my first video where I tried to tear down magnetic flux sensor which I purchased on Ebay recently for another project. It turned out very long, boring but I have decided to publish it anyway. I hope someone will find at least a part of it interestingLink:
Magnetic (hall effect) rotary encoder knob? - Page 1
Forum section: electronics / projects

author: 3dgeo
author_rank: Frequent Contributor
timestamp: April 25, 2019, 04:02:04 pm
content: Hello,currently I'm using low profile30 step regular rotary encoders, but due to their low profile they are a bit wobbly and they skip steps when rotating faster.So I was wondering, what about magnetic rotary encoder?I googles and found almost perfect (at least on a paper) IC:as5601. I wrote "almost" for a reason, looks like this IC has only one I2C adress (tried to contact AMS about it but their support is awful...) and it doesn't have interrupt pin which is kinda important in my opinion, cos now constant pooling is necessary. Well, interrupt is not a deal breaker – in a worst case scenario some sort of interrupt can be hacked from A/B output...What You think? Know better IC?I know that mechanical part design will be needed, but compared to "regular" encoder this will be a huge improvement in precision and user experience.EDIT:I found even better chip in all aspects: it has interrupt, different I2C addresses, way smaller and half a price:TLE493, take that AMS

author: Tek Tech
author_rank: Contributor
timestamp: April 25, 2019, 09:22:58 pm
content: Quote from: 3dgeo on April 25, 2019, 04:02:04 pmJust a suggestion: perhaps, alternatively to Hall effect, you could consider hacking the photo-encoder from intellimouse wheel? I think it has 24 interruptions in a full circle.Either way, it's quite an interesting project.Edit:There are rotary photo-encoders available for around $30. 8-64 pulses per revolution.https://www.digikey.com/product-detail/en/bourns-inc/EM14A0D-C24-L064S/EM14A0D-C24-L064S-ND/954403

author: 3dgeo
author_rank: Frequent Contributor
timestamp: April 26, 2019, 12:15:59 am
content: Thank You, thats an interesting suggestion, tho I need encoders for mass production and low profile – one off hack is not an option plus there are 2 encoders in the product, so using 2* 30USD encoders would increase price dramatically.I'm curious how much it would cost to order slightly modified (without "guts") regular encoders...I didn't mention that those chips encode in 12bit value, so 4096 steps per revolution, guess I'll have to buy few chips from third party and try them out (as I said AMS support sucks, hope their products doesn't).

author: Tek Tech
author_rank: Contributor
timestamp: April 26, 2019, 12:43:34 am
content: FYI, there is another type of optical encoder for $10 a piece or around $6 bulk price.https://www.digikey.com/product-detail/en/c-k/ENCOS16D2S65C/CKN11528-ND/7802517Other vendors (your local vendors?) may offer it even cheaper.Good luck with your project.

author: 3dgeo
author_rank: Frequent Contributor
timestamp: April 26, 2019, 01:06:18 am
content: Only 16 steps per revolution, that's too little, I need at least 30.Great news – I found even better chip in all aspects: it has interrupt pin, different I2C addresses, way smaller and half a price:TLE493, take that AMSI'll update main post.P.S. why aren't You sleeping, it's 3 at night in Poland
Magnetic Amplifiers - Page 1
Forum section: electronics / projects

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 25, 2014, 02:19:22 am
content: Good info / design resource:http://www.tuks.nl/pdf/Reference_Material/Magnetic_Amplifiers/Platt%20-%20Magnetic%20Amplifiers%20Theory%20and%20Application%20-%201958.pdfPractical note: although you can use most any core, "square" cores are best: special ferrites, permalloy, nanocrystalline... You can find Vacuumschmeltze parts at Mouser, or a few Magnetics parts here,http://www.surplussales.com/Inductors/FerToro/FerToro-3.htmle.g. 50B12-1D (a small permalloy type). Not sure where to find square ferrite aside from looking them up between manufacturers and magnetics distributors.The most common use today is the 3.3V post-regulator in ATX+ power supplies. These are usually amorphous or nanocrystalline inside a plastic snap-together case.I put together a 100W bias supply over the weekend,(I actually etched the board *years* ago, but never built it up until recently.)12V input, 71kHz 32V squarewave, bipolar, isolated.So, I've been playing with this a bit.Tim
Magnetic Card Reader Reverse Engineering (90's fellow) - Page 1
Forum section: electronics / projects

author: johm
author_rank: Contributor
timestamp: March 24, 2016, 09:41:59 pm
content: Hello!Does anyone have any info about this German magnetic card reader (Rinas MRW 1233)? I'm trying to reverse engineer this 7400 beauty. It has 90's written all over it. Take a look!

author: Seekonk
author_rank: Super Contributor
timestamp: March 24, 2016, 10:06:32 pm
content: I have boxes of new Wavetek card readers and cards same era. Just raw head ans motor drive.