hybridfree/eevblog-posts huggingface dataset:
Interface digitizer question - Page 1
Forum section: electronics / projects

author: Tony.T
author_rank: Regular Contributor
timestamp: November 25, 2022, 02:45:00 pm
content: i have a oled panel with digitizer (KTH3915SUS chip-.) it is a dell xps 15 oled panel.i have purchased a controller boardhttps://www.ebay.com/itm/165566515873and connected to the panel. Have picture and everything seems ok.want to use the digitizer to be able to have it like a touchscreen panel connected to a raspberry. On the controller board there is a touch port connector. Asked the seller about the pinout of the touch connector and if it will work. he said that i need to buy a new digitizer that fits to that controller board.dont want to buy a new digitilizer with controllerchip when it is already on my panel.The digitizer controllerboard is this one.https://www.ebay.co.uk/itm/234694403755?hash=item36a4e066ab:g:XrkAAOSwmWRjIPQpPlan to connect this digitizer controllerboard directly to the raspberry. BUT...the interface FROM the digitizer board. is it USB? SPI? ic2?Can i connect it directly to the rasberry in any way? and use it as a touchscreen for the raspberry os?the connector from the digitizer controllerboard has 6 leads.... the pinout??? two negative...one +5V ?? positive and the rest?Thanks
Interface Geiger counter - Page 1
Forum section: electronics / projects

author: @rt
author_rank: Super Contributor
timestamp: January 20, 2016, 04:17:34 pm
content: Hi Guys,I have an early 60’s Geiger counter, and would like to interface it to a micro through it’s headphone socket if possible.When connected to a scope, I see a negative going signal, but there appears to be a pair of negative peaks for every count.Has anyone interfaced to these, and is it usual to divide the total count by the micro by 2 to get a result?Cheers, Art.

author: vindoline
author_rank: Unknown
timestamp: January 21, 2016, 03:52:39 pm
content: I believe that the pulse sensing is generally taken right off the Geiger tube. See, for example,http://www.techlib.com/science/geiger.htmlandhttps://sites.google.com/site/diygeigercounter/circuit-description. You might be able to clean up the headphone "click" with a Schmitt trigger and use that, but you will have to experiment with your setup. Good luck!

author: m98
author_rank: Frequent Contributor
timestamp: January 21, 2016, 08:51:20 pm
content: Well, no need for external Schmitt-Triggers, because an digital input of a uC already has one.Could you show a picture of the generated waveform? Maybe there's just some ringing, which can easily be filtered away with a low-pass filter.

author: MartinX
author_rank: Regular Contributor
timestamp: January 21, 2016, 10:41:20 pm
content: The output is for a headphone so some load may be required, did you measure with the scope probe as the only load on the output? If so try to load it down with a resistor. If the headphones were in place when you measured it may be the headphones themselves created some kickback , try replacing them with a resistor.
Interface UART Touchscreen with CANBUS - Page 1
Forum section: electronics / projects

author: townie.au
author_rank: Newbie
timestamp: May 06, 2024, 06:34:49 am
content: HiIve got a 3d printer that its display uses a UART connection to connect to the mainboard. My setup uses CANBUS to communicate between the CB1 (RP4 equivalent) and the mainboard and between the CB1 and the EBB42 toolhead board. I want to use the stock screen.I was thinking I would need a CAN>UART(TTL) converter to interface the display on to the CANBUS so they can all communicate together. Ive looked around but not sure which one I need. The display uses 5V, so Im guessing I would need 5v type not 3.3v?. Do these adapters work in both directions?. The display would need to recieve the data to display info and will also send input from the touchscreen to the CB1.Or can I run UART and CANBUS together?

author: kevin.gibbs
author_rank: Regular Contributor
timestamp: June 27, 2024, 03:34:09 pm
content: The converter on the TJA1050 chip works in both directions and has a 5V supply on the UART side.
Interface/protocol to encoder on Panasonic servo motor   - Page 1
Forum section: electronics / projects

author: richardhsewell
author_rank: Newbie
timestamp: July 20, 2020, 03:03:22 am
content: Anyone know anything about the protocol used to interface to the rotary encoder in a Panasonic industrial servo motor? (MINAS A5 series, MSME). It is a 20 bit incremental encoder and has 5V/GND/PS/PS(NOT) connections. I was expecting this to be a regular quadrature encoder, but this seems to be a proprietary serial interface, with a bunch of chips (MNM 1222??) inside the encoder to support.Only information I can find is a short discussion which goes nowhere herehttps://www.physicsforums.com/threads/panasonic-incremental-encoder.879929/Was hoping to use some of these as input devices for a jog-wheel type application. Just spent ages figuring out the quadrature hardware module on the pocketbeagle, which I may still have to use but with a different encoder.

author: OM222O
author_rank: Frequent Contributor
timestamp: July 20, 2020, 06:55:11 am
content: What does the waveform look like? For any reverse engineering project you shouold start there. Post waveforms of both going forward and reverse.

author: capt bullshot
author_rank: Super Contributor
timestamp: July 20, 2020, 07:05:37 am
content: The Japanese drives have a bunch of more or less proprietary protocols. Don't know what Panasonic actually uses, but Tamagawa and A-Format come to my mind.There's a thread regarding this topic :https://www.eevblog.com/forum/projects/familiar-with-fanuc-servo-drives-reverse-engineering-serial-encoder/msg3045986/#msg3045986

author: richardhsewell
author_rank: Newbie
timestamp: July 20, 2020, 06:53:00 pm
content: Thanks for the link to the discussion capt' , that's sort of what I was looking for to give me a sense of what I'm dealing with here. Looks like this would be fairly challenging reverse engineering project starting from scratch and may require an FPGA to interface to the signal. That's more than I want to take on for this project when the alternative is to just use a regular optical quadrature encoder. Bit of a shame 'cause these are very high precision encoders with some nice tech inside them (and I'm getting them free from a machine pull).

author: smooker
author_rank: Newbie
timestamp: October 20, 2020, 08:28:53 pm
content: 2.5MBps RZ 8N1 RS4850x52 comes from drive - seems encoder reset.changes afterwards to 0x2a - read encoder command

author: grkmgry
author_rank: Newbie
timestamp: August 20, 2024, 01:54:58 pm
content: seems to respond to the following commands. but I could not find a protocol that fits these commands. it is not compatible with the standard tamagawa protocol.0x2A0x4A0x520x7A0xA20xDA0xF2
Interfacing 68k Peripheral IC (shared mem) with SDRAM / STM32 - Page 1
Forum section: electronics / projects

author: TheMenace
author_rank: Newbie
timestamp: September 13, 2018, 08:56:23 pm
content: Hi guys,i was wondering if it would be possible to interface an old chip, that was designedto share a 30pin simm-memory (4x4mb) with an Motorola 68000, with a 32MB SDRAM and an STM32F4?Giving levelshifting to meet up to voltage (5v vs 3.3v) of cause, but could the restbe as easy as just interfacing data/adress/CAS/RAS and WE one on one and providing the clock?Has anyone done it before and can shed some light for me?Thanks in advance!
Interfacing a large LCD with a little Micro - Page 1
Forum section: electronics / projects

author: Unclegummers
author_rank: Contributor
timestamp: June 11, 2012, 07:16:27 pm
content: About a year ago I came across this large LCD. Hitachi made, really nicely made kit.There are two power supply pins on it. Vcc/ground, and V5. The Vcc is for powering the chips, and the V5 is the "LCD Drive."Vcc takes up to 5.5 volts, which is fine, but the LCD drive takes up to 11V.When I originally tried powering this thing I figured the LCD drive needed 11V and only 11V. I hooked up the 5V to my Micro's power supply and a separate source for the 11V (It was a late night after some beers I'm sure.) It worked for about a second then my Z8 micro turned into a radiator.I realize that I can probably just power everything from some 5V source and not worry about power feeding back, but say I wanted to power it with the 11V? How the heck could I set this up so I can safely communicate with the LCD? Is it a specific power supply setup? Like not using two floating supplies? Or should this be done with some bi-directional optocouplers?You may notice a lot of optocouplers on my breadboard, but I realized that I would need a ton more just to get data in both directions...I was thinking of some kind of zener clamp as protection, but ahhh, dont like it.Anyway, let me know what you guys think.

author: mukymuk
author_rank: Contributor
timestamp: June 11, 2012, 09:02:47 pm
content: QuoteHow do you know? Datasheet? The datasheet should also tell you how to connect it all up. Post it here if you're having trouble understanding it.

author: TerminalJack505
author_rank: Super Contributor
timestamp: June 11, 2012, 10:48:21 pm
content: Most LCD modules these days are single supply. You might want to ditch that LCD module and buy one that operates from a single voltage. (The backlight, if any, is separate.) You can get them dirt cheap so there's really no reason to hassle with it.Either that or you are misunderstanding something. The V5 pin of the HD44780s are going to be wired-up something like the attached schematic. So, the voltage V5 needs to be might actually be -5V. Or, V5 is what other LCD modules call either Vo or Vee, which is used for contrast control.

author: Unclegummers
author_rank: Contributor
timestamp: June 13, 2012, 12:08:07 am
content: Quote from: TerminalJack505 on June 11, 2012, 10:48:21 pmThis is the first LCD I've interfaced with multiple supplies. And yes, you did clear that up, thanks!
Interfacing a LCD screen with a FPGA - Page 1
Forum section: electronics / projects

author: diracshore
author_rank: Regular Contributor
timestamp: February 19, 2012, 12:59:11 am
content: Looking at recent ipad 3 rumors it would appear mass production of 2048x1536, 9.7 inch screens has begun in China and the price will be around $120.http://www.truesupplier.com/oem-apple-ipad-3-lcd-screen-display-replacement-pr-29884.htmlIt would be nice to try something like this with these new parts, perhaps using say 4 at a time. With linux combining 4 screens is quite trivial.http://g3nius.org/lcd-controller/Just putting it out there. Would be interested in thoughts and opinions.

author: amyk
author_rank: Super Contributor
timestamp: February 19, 2012, 09:23:50 am
content: Quote from: Dave.S on February 19, 2012, 08:47:39 am2048x1536 15" has been around for some time already, look up the 92P6684. I don't find 9.7" at that resolution today to be much more than that.The refresh rate with using 4 of them at a time over a single link can't be very high. Maybe 4 video cards would be better suited to that.

author: Unknown
author_rank: Unknown
timestamp: February 19, 2012, 10:51:42 am
content: Quote from: Dave.S on February 19, 2012, 10:33:37 amHow can ppi be too high? Why would high ppi be unreadable? There's no requirement for characters to be 8 by 5 pixels. Just increase the resolution of the fonts and you get nicer, sharper text. Resolution is 256 ppi, lower than the modern iPhone displays, for example, and I don't see anyone complaining that its display is too sharp. Do you also believe that printing photographs at 400 ppi is pointless? Why should displays be any lower? Is there a requirement to always keep them at arms length?Sure, there will be diminishing returns at some point, but if the technology is available and the costs are not prohibitive, why not?

author: 8086
author_rank: Super Contributor
timestamp: February 19, 2012, 02:48:09 pm
content: Quote from: Dave.S on February 19, 2012, 10:33:37 amThe resolution of the next iPad is still going to effectively be 1024x768, except instead of 1x1 actual pixel per "pixel", there's 2x2 pixels, making a sharper, but not smaller, image.

author: diracshore
author_rank: Regular Contributor
timestamp: February 19, 2012, 07:45:14 pm
content: I think you might be surprised how easy tiny text is to read. If the resolution is capable, then you can feed it whatever you like, even if Apple just want to sharpen image uses. Using linux it is often the case I have never ending realtime log readouts I have to refer to. It would be nice to use a screen like this. Plus you know they will be IPS.

author: born2bewilder
author_rank: Newbie
timestamp: February 20, 2012, 06:38:43 am
content: The resolution of my motorola droid is 235 ppi, and I find that a distinct improvement over most device displays.I didn't find the measurements exactly but I think this display should be like 250-260 ppi.I find the higher ppi very nice, whether just for playing angry birds or esp. using dynamic zoom on a large doc or web page.That res. on a 9-10" screen, with enough hardware to run it smoothly... that plain makes me drool.
Interfacing a simple reed switch for measuring low speeds.  - Page 1
Forum section: electronics / projects

author: XaviPacheco
author_rank: Regular Contributor
timestamp: June 29, 2018, 06:03:01 am
content: Hi,I'm using a reed switch those found in home treadmills to measure speed. Which would be the best way to interface it with a microcontroller according to the attachments? I intend to do debouncing by software maybe.

author: duak
author_rank: Super Contributor
timestamp: June 29, 2018, 04:11:51 pm
content: I would debounce the signal in software. The exact method depends on what resources are available in the microcontroller. One way is to use an interrupt timer to invoke a service routine to sample the signal at, say, every 10 ms or so. A software flag can then be set if two successive samples are the same.If you decide to use a more complicated circuit that uses a capacitor to filter the signal beware that a reed switch, or any switch, may have its current rating exceeded by discharging the capacitor. I would use a resistor between the the switch/pull-up resistor node and the capacitor/input node to limit the discharge current. The value of the resistor must be greater than the maximum voltage across the switch divided by the switch's current rating. I would try to find the typical operating current for the switch - the one that the manufacturer uses to determine lifetime - and use it as the maximum current rating.Cheers,

author: XaviPacheco
author_rank: Regular Contributor
timestamp: June 29, 2018, 07:00:31 pm
content: So, If I decide to debounce in software I can use the first configuration.
Interfacing AMC1203 To Cortex M3  - Page 1
Forum section: electronics / projects

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: August 13, 2017, 08:51:02 am
content: Hi,Do you have any experience regarding interfacing these Isolated Delta-Sigma ADC's to Cortex M parts, how we should read them? can we read the data with SPI and do the math in DSP libraries? do we have enough MCU Power? Have you done it?The cortex in mind is something Like LPC1768 or STM32F103 or something similar,

author: Yansi
author_rank: Super Contributor
timestamp: August 13, 2017, 09:30:46 am
content: Use an STM32 part equipped with DFSDM peripheral. Look at the ST website for those. DFSDM will accept the pulse density modulation and produce a usable result out of it. (STM32F412, STM32L476, etc..)Otherwise you're left with an SPI and then processing it via software. Can be done on F103 I guess, was done before with MEMS microphones.ST has a library for that, seen that somewhere, but I consider that to be stupid to do by SW.If you have the AMC1203 I guess you do not need to cheap out, you probably will be able to buy a properly equipped MCU, like the STM32 with DFSDM. They are not as much more expensive compared to the F103 and also the F412 and L476 are both Cortex M4F, which will leave you a PLENTY of processing power for any DSP algorithms.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: August 13, 2017, 10:27:54 am
content: Thanks, Does Cube Support the DFSDM?

author: Yansi
author_rank: Super Contributor
timestamp: August 13, 2017, 10:42:01 am
content: I think it should.
Interfacing an ACS37220 current sensor to MCU ADC. - Page 1
Forum section: electronics / projects

author: djsb
author_rank: Super Contributor
timestamp: July 30, 2024, 05:00:31 pm
content: I'd like to interface a ACS37220 +/- 100A 20mV per amp current sensor (ACS37220LEZATR-100B5) with a 5V supply to a PIC/ESP32/PICO MCU.https://www.pololu.com/product/5297The output of the sensor with nothing connected to it is 2.48 Volts. I need to send the CHANGE in voltage to an ADC convertor. So if the voltage goes ABOVE or BELOW 2.48 volts, then pass this along to the ADC. If the voltage stays at 2.48V then the output of the interface circuit stays at ZERO or maybe just pass the 2.48 volts through? I am used to only working with 0 to 5 inputs to an ADC so I'm just wondering the best way to proceed with this bidirectional voltage. It's probably really simple, but a nudge in the right direction would be nice. Thanks.

author: langwadt
author_rank: Super Contributor
timestamp: July 30, 2024, 05:12:25 pm
content: when there's no current the voltage is 2.5V, when there's current in one direction the voltage is above 2.5V, when there's current in the other directed the voltage is below 2.5VCurrrent in amps = (voltage - 2.5V)/20mV ...

author: Terry Bites
author_rank: Super Contributor
timestamp: August 01, 2024, 10:22:10 am
content: A level shifting opamp circuit will do the job, see attached.Its a simple subtractor with a gain of 2The opamp needs to be a single supply RIRO eg MCP6497.See this handy pdf on solving single supply offset and gain issues.

author: Jeroen3
author_rank: Super Contributor
timestamp: August 01, 2024, 10:36:59 am
content: Will you be measureing AC or DC?If AC, ignore the 2.48V, put a high pass filter in software.If DC, put a potentiometer on other ADC channel and subtract this value. Zero offset calibration performed with potentiometer.

author: djsb
author_rank: Super Contributor
timestamp: August 01, 2024, 04:59:16 pm
content: Thanks for all of your replies.My application is DC. I want to measure the current into and out of my motorcycle battery. It is a lithium-ion battery with built-in battery management (that's what they claim). I suspect that there is a parasitic current draw as well.Initially, I want to try using a Sparkfun OpenLog Artemis.https://www.sparkfun.com/products/16832The problem is the ADC of the Artemis has a maximum allowable input of 2 volts, so I have to scale the output of the current sensor to match the Artemis.

author: langwadt
author_rank: Super Contributor
timestamp: August 01, 2024, 06:53:37 pm
content: Quote from: djsb on August 01, 2024, 04:59:16 pmresistive divider to get 0-5V down to 0-2V

author: djsb
author_rank: Super Contributor
timestamp: August 01, 2024, 06:56:42 pm
content: Yes, I'm going to try a 10k and 6k8 resistor. I'm hoping it's that simple.
Interfacing an audio amp to my bluetooth speaker? - Page 1
Forum section: electronics / projects

author: iamdarkyoshi
author_rank: Frequent Contributor
timestamp: December 21, 2015, 07:41:48 am
content: I have a pam8610 premade amp board with a standard analog audio input. My bluetooth speaker (which I want to supercharge with larger speakers and amp) uses a pam8404 amp. On the inputs of the pam8404, each channel has a + and - input and each of the four total inputs have a small capacitor in series. How would I connect my pam8610 amp (or basically any amp) with it only having standard analog in? How does this negative and positive thing work on the bluetooth's amp? I see that my pam8610 seems to use the same type of positive and negative configuration but the board somehow makes it a single input fpr each channel, should I connect the output of the analog swith to the input of the pam8610 though the surface mount capacitors using bodge wires, just like the existing amp? I should also add that I plan on using both amps at the same time. Thanks!
Interfacing CML devices at different Vcc levels? - Page 1
Forum section: electronics / projects

author: DenzilPenberthy
author_rank: Frequent Contributor
timestamp: April 15, 2024, 03:27:15 pm
content: Hi, I've got various components in a signal chain which use CML input/output stages. However I can't find all the components I need in the same Vcc range. Some are 5/3v3, some are 3v3/2v5 and some are 2v5/1v8. So I can't makle the whole chain the same Vcc. I can narrow it down to one discontinuity - from a 3v3 output to a 2v5 input.Our signal isn't DC balanced which makes AC coupling problematic.Is there some easy way that I'm missing to interface a 3v3 CML output (which is internally pulled up to 3v3):https://de.wikipedia.org/wiki/Current_Mode_Logic#/media/CML_output_stage.svgwith a 2v5 CML input which idealy needs to be terminated with a pullup to 3v3 to satisfy the requirements of the outputhttps://en.wikipedia.org/wiki/Current-mode_logic#/media/CML_line.svgCheers.(I couldn't get inline picture to work and the links seem to take you to the wikipedia pages, rather than the images, sorry)
Interfacing door phone - Page 1
Forum section: electronics / projects

author: hari
author_rank: Contributor
timestamp: March 26, 2014, 04:24:46 pm
content: Hello,the house where I live has a multi-party 2wire door phone system from the italian manufacturer ACET. I want to hook that up to my home automation system somehow. Here are some details about the innards of the door phone:http://www.intercomsrus.com/handset%20pdf/Acet%2022220%20_2%20Wire_%202011%20Version%20Intercom%20Handset%20Data%20Sheet.pdfI can open the door strike by just shorting the two wires coming in from the main unit to my door phone. What I'd like to achieve is a) triggering a binary input on some micro controller when it rings, b) power the micro controller from the 2wires, and maybe c) hook that up somehow to a telephone (FXS adapter).Any hints?br Hari
Interfacing LCD projector panel - Page 1
Forum section: electronics / projects

author: jjman
author_rank: Contributor
timestamp: January 31, 2015, 06:03:41 pm
content: Does any of you guys have idea how to interface these?Something like this:http://www.yylamp.com/products_info/Projector-Replacement-LCD-Panel-LCX039A-134320.htmlI am building a projector and I did made it work with RaspberryPI and one of those 1.8 inch screens (removed the backlight and used the LCD only) but the polarized filtes make the picture extremely dim. (Of course if you remove them then it is bright but ... does not work
Interfacing mass-produced camera chips - Page 1
Forum section: electronics / projects

author: 741
author_rank: Frequent Contributor
timestamp: May 16, 2018, 02:24:25 pm
content: I had an enquiry about producing a customised cycling/action camera. I'd guessing '720p', not sure.I wonder how to source/second-source the basic camera 'chips' and how to interface, also typical pricing and what standards the various chips might have in common.It needs to loop-record to SD card. I've done a little basic low-speed SD card stuff + FAT once, that's all though.Is this feasible with "PIC & 'C'" and - in an attemptto save a lot of time searching - please does anyone have some relevent pointers/links?Thanks.Stephen.

author: Rerouter
author_rank: Super Contributor
timestamp: May 18, 2018, 03:24:10 am
content: For interfacing, have a look at mikeselectricstuff 's youtube channel, he goes into interfacing cameras. And heavily using the DMA functions to allow handling camera datarates on the cheap.Still a 720p sensor will take a fair bit of bandwidth depending on your desired frame rate.

author: amyk
author_rank: Super Contributor
timestamp: May 18, 2018, 04:17:04 am
content: 720p is consideredlowresolution for the typical smartphone camera modules which you would probably be fine with, and they're pretty cheap. The interface is likely to be MIPI CSI or perhaps serial, it is doable to "stream" data into an SD card if you get all the timings lined up just right. You'd probably want to compress the output, however, and that goes easily into the realm of custom SoCs --- 1280x720 60FPS 24bpp uncompressed video takes ~160MB/s which is far beyond what the majority of SD cards can do.

author: 741
author_rank: Frequent Contributor
timestamp: May 18, 2018, 08:21:12 am
content: Compression is a good point, I seem to recall Microchip have libraries implementing that, though it might just be JPG.Two other routes I'm consideringFTDI do a range of camera interface chipsRasperry Pi - would the 'nano' suffice?
Interfacing Raspberry Pi with Keithley 3390 - Page 1
Forum section: electronics / projects

author: john1998
author_rank: Newbie
timestamp: June 21, 2018, 05:41:34 am
content: I wanted to interface Rpi with the function generator Keithley 3390. My goal is to capture the signal which Keithley 3390 generates and plot it using Rpi, i.e, to function it as an oscilloscope. I went through the reference manual of Keithley 3390 but could not come up with a solution. Please help.
Interfacing SGMII to an SFP module - how? - Page 1
Forum section: electronics / projects

author: Yansi
author_rank: Super Contributor
timestamp: April 04, 2021, 01:23:11 pm
content: Hello,I am having a difficulty understanding, how one interfaces an SGMII to an SFP module.SGMII by itself seems to be a one pair Tx and one pair Rx serial stream running already at 1.25 Gbps, likely carrying the 8b/10b encoded ethernet data.The 1000Base-X optical interface is also running 8b/10b encoded at 1.25 Gbps.So can one interface an SGMII directly to the electrical side of an SFP module or not? I am finding contradicting information.Based on studying two different (yet very very similar) GbE switch chips:Realtek RTL8367S (datasheet)Microchip KSZ9897S (datasheet)The Microchip one states clearly, that it supports 1000Base-X mode and you need obviously to flip some bits in the config to be able to use the SFP module.While the Realtek makes no mention of "fiber" or "1000Base-X" in the datasheet, apart from a table 32 describing a read-only status register, claiming 1000Base-X support: No!So what is the puzzle I am missing, what fits in between SGMII and the SFP? Can one use an SFP slapped onto the Realtek switch?Many thanks for making this mess more understandable for me.Y.

author: mvs
author_rank: Frequent Contributor
timestamp: April 04, 2021, 08:59:23 pm
content: SFP interface (1000Base-X SerDes) is a subset of SGMII. In contrast to SGMII it's fixed to 1Gbit/s speed and has no autonegotiation.

author: Yansi
author_rank: Super Contributor
timestamp: April 08, 2021, 08:39:10 am
content: Thank you for reply. I am ccompletely new to designing stuff with the gigabit ethernet and fiber optics, so I am sorry for so dumb questions, as this seemed to be very confusing at first.Later I have found out exactly what you told me. The ASIC with SGMII needs to have an option to select 1000BASE-X interface it seems. To be honest, I am currently researching a Realtek RTL8367S for an application, and it was a bit complicated to decrypt how it can be used, the documentation is not as easy to find.//I am glad the eevblog forum is working again!
Interfacing Sony's IMX Sensor - Page 1
Forum section: electronics / projects

author: damien22
author_rank: Contributor
timestamp: October 25, 2019, 09:22:39 am
content: Hi There,I would like to interface a Sony sensor directly and the goal is to get an image through an Ethernet connection. The setup is to take long exposure still images in low light, like astrography. There is no needs of high-speed onboard processing or compression.Despite having done quite a bit of research, informations are sparse, to say the least. From the sensor datasheet itself, it seems doable to directly control it from a powerful 32bit uC (some of the microchip comes with integrated 32MB of ram) and quite a bit of firmware.Also some Chinese made USB cameras using IMX sensors seem to have very little electronic while others seem to be heavily packed, I guess all depending on resolution and framerate required.Is there anyone had to experience with sony's sensor, does sony has some specific chipset that can be used (haven't found anything so far), DIY projects of some sort.. ?Any pointers to any useful resources would be greatly appreciated!

author: Someone
author_rank: Super Contributor
timestamp: October 25, 2019, 10:04:23 am
content: Quote from: damien22 on October 25, 2019, 09:22:39 amImage sensors have a data sheet collection including details of the interface, and even within Sony IMX they are widely varied and most have minimum clock speeds. But, supply will be your biggest challenge as trying to buy one offs or low quantities will usually end up at a higher unit price than a fully built camera with the same chip.

author: damien22
author_rank: Contributor
timestamp: October 28, 2019, 04:04:02 am
content: Cost isn't an issue even if it is above having a complete camera (although standard IMX290 sells for about 15$), we are looking at a very specific sensor from Sony which is the IMX290LQR.

author: amyk
author_rank: Super Contributor
timestamp: October 28, 2019, 12:08:48 pm
content: Quote from: damien22 on October 25, 2019, 09:22:39 amThe full datasheet is easily obtained and has almost all the information you need.

author: damien22
author_rank: Contributor
timestamp: October 29, 2019, 09:38:31 am
content: Well yes, but the question isn't really about the sensor itself, but the possible implementations. Notably specific control chipset and overall experience and software stack....

author: Someone
author_rank: Super Contributor
timestamp: October 29, 2019, 11:12:37 pm
content: Quote from: damien22 on October 29, 2019, 09:38:31 amThe sensor manufacturers treat them as hardware items, you attach/design a suitable interface and processing/software, they don't get involved in that. You're asking more about an ISP (image signal processor) which are produced by 3rd parties.
Interfacing STM32 and Tenum-640,  Camera Not Responding  - Page 1
Forum section: electronics / projects

author: Assad
author_rank: Newbie
timestamp: June 16, 2025, 11:47:47 am
content: I'm trying to connect a Tenum 640 thermal camera (Base + Feature Board configuration) to my STM32 Nucleo board but getting absolutely no response from the camera. I've tested my STM32 UART with loopback and it works fine, so the issue is definitely with the camera side. The camera doesn't respond to any commands through RS232 interface (using TTL-to-RS232 converter) and also doesn't show up as a COM port when I connect it directly to my PC via USB.I've tried different baud rates (9600, 57600, 921600), waited long boot times, used external power supply, and tested with both terminal software and STM32 code. The camera seems to power up normally but just won't communicate at all. There are no error messages or unknown devices showing up anywhere.Has anyone successfully interfaced a Tenum 640 Base + Feature Board before? What could be causing this complete communication failure? Any suggestions on how to troubleshoot this or alternative ways to test if the camera is working would be really helpful. I'm open to any ideas or different approaches to get this working.

author: Simon
author_rank: Unknown
timestamp: June 16, 2025, 04:42:53 pm
content: https://www.eevblog.com/forum/microcontrollers/interfacing-stm32-and-tenum-640-camera-not-responding/msg5949675/#msg5949675Please do not double post. You will not be popular.
Intermittent ADV7125 - Page 1
Forum section: electronics / projects

author: MattHollands
author_rank: Frequent Contributor
timestamp: September 10, 2018, 11:53:14 pm
content: Hi all.I am driving an ADV7125 video DAC (50MHz, QFP) with an FPGA, but it is working intermittently.By "working intermittently" I mean that it stops working for periods of 30+ mins and then starts working for equal periods of time.By "not working" I mean, there is zero volts on each of the IOR, IOG and IOB pins. When it is working it works perfectly. Putting a slight pressure on the chips doesn't help.I am driving it with a 48.75MHz which I have measured (scope attached). The edges aren't perfect but I am measuring this signal using passive probes over a 1.5" twisted pair so I reckon in reality it is better.There is a 75R resistor terminating each output on the board and when it is connected via the VGA cable there is a 75R termination on the display. I have measured this to be about 38R in circuit on each output which seems right.My original guess was that there was a setup/hold issue but driving the DAC with a constant RGB value does not fix the issue, which it would if there was a setup/hold issue.There is a 523R resistor between ground and RSET which I have measured in circuit to be about 480R which sounds about right.Vref measures about 1.2V in circuit which is fine.I have measured all Vaa pins to be 3.3V during operation and all of the grounds appear to be connected.PSave is connected to 3.3V via a resistor.I have not measured all of the R[7:0], G[7:0] and B[7:0] pins at once but maybe I will have to, but it's a real pain.Seriously at a loss, going to try to clean the board better incase it's some flux or something but I am grasping at straws. Has anyone seen any similar issues? Any idea why this is intermittent? Any suggestions?Could it be a dodgy chip?

author: james_s
author_rank: Super Contributor
timestamp: September 11, 2018, 06:33:44 am
content: I'm not sure what else it could be if all the signals and voltages are correct, if vref is ok and data is being clocked into the DAC it's probably a defective IC. You might try heating or cooling it.

author: MattHollands
author_rank: Frequent Contributor
timestamp: September 13, 2018, 10:55:55 pm
content: I tried heating and cooling but couldn't find any strong correlation between temperature and health.I managed to track it down to the compensation pin. Replacing the capacitor on the compensation pin made it workUnfortunately threw away the old capacitor without thinking so can't look into exactly what was wrong, but it wasn't measuring short... Suspect dry joint or something, although I would've expected temperature to have an effect if that were the case... Anyway, fingers crossed it is solved... has been working for about 4 hours of runtime so far...
International Equivalent Standards   - Page 1
Forum section: electronics / projects

author: darthhideous
author_rank: Newbie
timestamp: January 07, 2019, 01:53:20 am
content: Hi all,Can anyone shed some light on how equivalent US/UK/Australian electrical standards are? I'm wondering how much additional testing may be required for a product to be compliant in the US/UK. From some quick googling I've found what appears to be equivalent standards for what the product is already compliant to in Australia if anyone that's worked in the US/UK could clarify whether they actually are or know of anyone that can assist?AS/NZS 1768 -> IEC 62305AS/NZS 3123 -> IEC 60309AS/NZ6 3820 -> IEC/UL 60335 or IEC/UL 61010 or NFPA 70AS/NZS 3000 -> IEC 60634 or NFPA 70AS/NZS 60950 -> IEC/UL 60950AS/NZS 60038 -> IEC/EN 60038Are there any additional standards in the US/UK that may be applicable for a general electrical appliance (runs off 240V 50Hz but can run off 110V 60Hz) ?Thanks!

author: amyk
author_rank: Super Contributor
timestamp: January 07, 2019, 03:15:59 am
content: I haven't looked at those specific standards before in particular but for some of them I know that "equivalent" really means "we just reformatted the text a little and changed the cover page" --- in other words, the technical content is the same.Edit: I found the first two (AS/NZS 1768 and IEC 62305) and they are more different than just reformatting. However I believe the ones which have the same numbers, like the 60950, may be a simple reformatting.

author: Neilm
author_rank: Super Contributor
timestamp: January 07, 2019, 07:51:50 pm
content: See if you can download the first few pages of the standard. If you can have a read - if they are equivilent there may be a statement to that effect.

author: Apollyon25_
author_rank: Regular Contributor
timestamp: January 31, 2019, 02:23:42 am
content: Generally speaking, if it has the same number, it is a 'harmonized' standard to the original parent, be that IEEE, IEC, EN etc etc. and that results to one apply to the other. Though there may be some exceptions to this - especially if there are intentional radiators (i.e. radios) involved.Typically you'll have to pay for the standard in order to see if you need to meet it. Though at one point I found a site that had ripped copies of a bunch of standards so you could actually read them to see if you needed to meet the damn thing...You might be better off talking to a local compliance lab (EMC Tech in Australia is one...) as they'll know what you need for a given geographical market, and which local standards are relevant, or can be used cross-credit style, if at all.The other option is to find a similar product for sale in the market you intend to go into and query their compliance documentation (if it isn't already published or the relevant standards at least listed).Though I suspect you may have already done this exercise to have come up with the list you posted.
internet controlled remote vehicle - Page 1
Forum section: electronics / projects

author: kyndal
author_rank: Regular Contributor
timestamp: August 23, 2017, 11:21:38 pm
content: Hi Guys.I'm about to get going on a hobby project I have been wanting to do for a while. i want to build an over internet controlled vehicle, robot, rover ??I got hold of a kids sized "mini pocket quad" for next to nothing mechanically good. burnt out motor'I'm going to go electric anyway. but rather large i suppose. for a toy. Similar to the one below.my idea is to have a usb steering wheel, with buttons and what have you hooked to a computer. windows/linux?couple of screens for IP cameras and such.(or maby simpler) a dedicated micro. with USB HOST & HID input that "streams" values (buttons, wheel inputs etc) to the receiving end..vehicle end. probably a raspberry pi. with a handful of arduinos running various I/O motor controllers, servos, lights, lasers, guns etc.connected to wifi.my question is. for the control side of things. what would be the best / proven "go to" framework for this sort of thing.. communicating the information needed to drive the servos, actuators etc.that i can adopt. rather than reinventing the wheel.should it be home brewed. then i'm leaning towards running MQTT on a raspberry pi on the vehicle. my experience so far with MQTT is adaptable and pretty fastwhen on a dedicated deviceany input would be greatly appreciatedThanks

author: mubes
author_rank: Regular Contributor
timestamp: August 24, 2017, 04:15:50 pm
content: Hi,There's an infrastructure over athttps://github.com/mubes/garonnefor low level vehicle control based around a lpc4367 dev board for low level control and a pi for high level. Dunno if it's any use for you but it was basically designed to be uber-extendable so it might be suitable. Current high level infrastructure is python so it's easily adapted.Dave
Internet watchdog relay project - Page 1
Forum section: electronics / projects

author: Solder_Junkie
author_rank: Frequent Contributor
timestamp: March 22, 2024, 08:13:39 am
content: I have a remote controlled system that uses a mobile broadband router, occasionally it has needed a reboot, which is a job that could be done automatically saving me driving to reset it...There have been one or two Raspberry Pi projects that turn off a relay for a few seconds if a return ping to an internet address fails. There are also Chinese internet watchdog units, such as eBay.co.uk item 296195240193, that might be cheaper than buying a Pi, but lack details and have a general "toy shop" look about them.It seems like such a common requirement that others must have done this before, yet such projects seem scarce... Any pointers and ideas, other than using a clock timer to turn it off twice a day?ThanksSJ

author: Berni
author_rank: Super Contributor
timestamp: March 22, 2024, 10:32:47 am
content: Yep, however the alternative is buying proper networking equipment that keeps working without the need to be restarted every so often.I had to restart routers at home too here and there say once a month or two. Some of the failures wouldn't even be picked up by such a internet watchdog device, like one of the failure modes was that DHCP stopped handing out IP addresses. So technically the internet is still working for all existing devices, but plugging in a new device set for dynamic IP would fall on its face and not work.Then once it was time to upgrade my network to gigabit (yeah this was a good while ago) i decided to spend a bit more money on a serious router (rather than the cheep home routers i had until then) and so i bought a little 5 port Mikrotik routerboard. It was a game changer. In the over a decade of owning it, i had to only reboot it twice, both of those was due to performing a firmware update. They are rock solid. Also am running my modems all in bridge mode to prevent them from trying to do anything to my traffic.I also had coworkers that had lots of reliability problems with their home network, recommended them a Mikrotik and from then on they have 0 issues.

author: nali
author_rank: Frequent Contributor
timestamp: March 22, 2024, 10:45:26 am
content: It's quite an old problem for mobile data modems/routers where the site is static and stays registered to the same cell. The network just "forgets" the device until it re-registers which is normally done by repowering the modem. More a cellular network issue than the quality of the mobile device.Most of the equipment I've seen (and all the equipment I've comissioned) contain either a watchdog in the router itself, or a modem power switch controlled by a GPIO for this very purpose.

author: fourtytwo42
author_rank: Super Contributor
timestamp: March 22, 2024, 07:36:01 pm
content: Quote from: Solder_Junkie on March 22, 2024, 08:13:39 amUse an ESP8266 much cheaper than a Pi, about a fiver IIRC (Ebay).I have quite a few dotted around and they all check there connection to whatever net device they are interested in, it would be very easy to drive a relay from a pio line.
Interpreting datasheet - Page 1
Forum section: electronics / projects

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 24, 2014, 03:03:03 am
content: Hi all,p/n ADS5292http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=ads5292&fileType=pdfUnder absolute max ratings pg 5, for digital inputs, it says "min[2.2, AVDD+0.3]". I've never seen that before but I guess it means pick the least between the two.So with AVDD at 1.8V, it would mean that 2.1V is the absolute max for a digital input?But on pg 9, "DIGITAL CHARACTERISTICS", it says "All digital inputs support 1.8-V and 3.3-V CMOS logic levels."So, um, now what?Any ideas? What am I seeing wrong here? Can I skip level converters here or will the chip explode into a shower of sparks?TIAAlex

author: T3sl4co1l
author_rank: Super Contributor
timestamp: July 24, 2014, 08:00:29 am
content: Guessing they mean the usual 0.8/2.0V thresholds typical of CMOS. So you'd have to use a limiter, say a current limiting resistor and schottky diode clamp, to connect 3.3V outputs to it. But you're otherwise guaranteed to get correct logic states.Yeah, they could've written that better.A proper level translator will probably use less current and offer slightly better switching performance, if that's a concern. Of course, you'll need one to go from 1.8 to 3.3, regardless.Tim

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 24, 2014, 03:44:02 pm
content: Quote from: T3sl4co1l on July 24, 2014, 08:00:29 amThanks, I see what you mean and I'll stick a level translator on there.

author: David Hess
author_rank: Super Contributor
timestamp: July 26, 2014, 03:49:55 pm
content: I agree. It supports 1.8 volt and 3.3 volt CMOS logic levels because the minimum logic high input voltage is 1.3 volts but is *not* 3.3 volt tolerant.What a useless statement in a datasheet given that they do not specify maximum permitted input current. They might as well have said it supports 5.0 volt CMOS logic levels as well.I actually expect this kind of thing from TI. They have a long history of such shenanigans.
Interpreting markings on motor start capacitor - Page 1
Forum section: electronics / projects

author: calzap
author_rank: Frequent Contributor
timestamp: January 17, 2020, 06:09:58 pm
content: The capacitor is Lorenzetti brand, and a picture of the label is below. First thing that puzzled me was the capacitance rating of 540/648uF. Ordinarily this would indicate a two-in-one capacitor like the type used in air conditioning units ... one cap for the compressor, the other for the fan. However, those combo caps have three terminals, one being a common. This cap has only two terminals. See the pic below. So, I'm guessing the 540/680 is a range of needed starting capacitance for which this capacitor will work. It measures 540 uF on my meter.Then there is the vn/vP 110/120vca designation. I'm familiar with Vn and Vp for opamps, but not capacitors. The vca I assumed at first was a typo for VAC. Then I noticed the cap was made in Brazil .... so the abbreviations could be Portuguese. Volts in Portuguese is volts, and alternating current is corrente alternada ... that matches vca.What about vn and vP? First, I assume the printing device did not allow descenders, so it's vn and vp. And assume vn applies to 110vca and vp to 120vca. So vn might be volts normal, and vp might be volts pico. Anyone have a different interpretation?Mike in California

author: Benta
author_rank: Super Contributor
timestamp: January 17, 2020, 09:03:29 pm
content: The 540/648 uF rating is most likely the capacitance range, read: tolerance.It tallies with 540 uF -0/+20%, which is a normal range for this type of capacitor.vn I'd guess as nominal AC voltage, vp as maximum AC voltage (which is tight, not much margin there).
Introduction and Question - Page 1
Forum section: electronics / projects

author: testep02
author_rank: Newbie
timestamp: June 02, 2015, 02:21:20 am
content: Hey, Dave. First time poster, but long time follower. Let me just say that I love your videos and have seen just about all of them. I have learned so much over the years.I really like the design of the uSupply, but have some questions about when the code will be released. I'm especially curious about the part where the voltage is read in by the ADC and the value converted to a decimal value to display on the screen, and how you convert the rotary encoder input to a value to set the DAC value and also display that value on the LCD in decimal form. I read an earlier post that you don't like to post incomplete code and board files, but do you think you could do maybe a small write-up or video on how you control that part of the uSupply? I think a lot of people would be curious about that.