hybridfree/eevblog-posts huggingface dataset:
Problemd with finding datasheet - Page 1
Forum section: electronics / projects

author: J.Tax
author_rank: Contributor
timestamp: March 05, 2015, 10:25:02 pm
content: Dear all,I'm currently bissy with a little projecy, and for that project I use a philils rc 0150 / 01 remote control.For some minor changes I'm looking for the datasheet of the chip on the pcb, and cant find it any were. The chip on the pcb is a; 'MALAYSIA D6133520' (see picture down below). Does somebody knows where I can find the datasheet or has the datasheet?I hope you guys/girls can help me.Greetings,J.Tax

author: wraper
author_rank: Unknown
timestamp: March 05, 2015, 10:41:09 pm
content: 5 seconds of googling:http://www.alldatasheet.com/datasheet-pdf/pdf/6962/NEC/UPD6133.htmlhttp://documentation.renesas.com/doc/DocumentServer/U11726EJ1V1AN00.pdf

author: J.Tax
author_rank: Contributor
timestamp: March 05, 2015, 10:45:47 pm
content: This seems to be what I'm looking for. I searched for weeks and didnt find anything.Thank you very much.
Problems trying to develop a stepper motor driver with TB6600 - Page 1
Forum section: electronics / projects

author: SERGIO_372
author_rank: Newbie
timestamp: June 22, 2024, 07:11:33 pm
content: Hello, I am developing a stepper motor driver using the TB6600HG. However, when I plug the motor, all I hear is a faint buzzing sound, and the motor does not rotate. When I send commands to rotate, I can hear a subtle sound, but the motor still does not move.This is the first time I am trying to develop my own hardware, I will post the schematic.The step motor is a NEMA 23 model 23HS5628What I have done so far:- Tested the motor with a driver I had already bought, and it worked perfectly.- Replaced the TB6600HG and got the same symptom.- Soldered the components onto a board, as I thought there might be a bad contact or interference on the breadboard, but the problem persisted.- Tested with different microstep configurations.Could someone help me understand what might be happening? Did I design something incorrectly? What am I missing?

author: Benta
author_rank: Super Contributor
timestamp: June 22, 2024, 09:00:22 pm
content: You seem to be powering things from the Vreg pin.I don't see that as possible from the data sheet. In fact, quite the opposite.If you have an external +5 V supply, it should not be connected to Vreg like you've done.

author: SERGIO_372
author_rank: Newbie
timestamp: June 22, 2024, 10:52:48 pm
content: You are absolutely right. And yes, I'm using 5V from an external supply. I removed the external 5 volts from VREG. I also noticed that the sounds the stepper motor was making were because of the poor quality of the 5V supply (ripples). Fixing those issues made the driver work. Thank you.
Problems with a ripple counter + logic gates. Please help! - Page 1
Forum section: electronics / projects

author: PauloConstantino
author_rank: Regular Contributor
timestamp: January 10, 2017, 08:51:34 pm
content: Hey friends,this is my first post here.I was designing a circuit and in the end it didnt work. I tried to identify the problem and I noticed something really weird. Basically I have a 4bit binary ripple counter, and I take 2 of the outputs 3 and 2 say, and send them into an OR gate. Then I probe the output with my scope and I see a waveform which is kind of a superposition of the two inputs, rather than an actual OR. I can't tell if it's just my scope that is going nuts, or whether I can't gate the outputs of the counter.Here are some photos of the waveforms:The first two are the input waves into the OR gate. The last is the output, as you can see it's garbage. As far as Im concerned, the main problem is not hazards, although there are small hazards embedded in the signal. But for the most part the signal is just an undecided signal. I dont know if my scope is loading the signal and changing it, but my scope is working perfectly. If I probe the inputs, they look perfect. It's just the outputs that are undecided. Please please help me!!

author: Andy Watson
author_rank: Super Contributor
timestamp: January 10, 2017, 09:05:37 pm
content: Try triggering the scope on the slowest output. The glitch at each clock looks like a race-condition - one of the gotchas of using non-synchronous logic.
Problems with an LTC4001 Board? - Page 1
Forum section: electronics / projects

author: snowluck2345
author_rank: Newbie
timestamp: September 16, 2015, 10:43:30 pm
content: I just assembled an LTC4001 board and am having some issues and would love some help. The CHG pin is pulled low which means the chip thinks it is charging, however only 5-30mA is drawn.

author: qwaarjet
author_rank: Regular Contributor
timestamp: September 17, 2015, 01:56:27 am
content: Whats the voltage on the battery? If it is already near a full charge the chip might be in the constant voltage stage and not draw much current. Alternatively if the battery is very dead <3V it will do a linear charge of 50mA on the battery.

author: snowluck2345
author_rank: Newbie
timestamp: September 18, 2015, 10:34:45 pm
content: Battery voltage was around 3.9 on the pack I was charging which isn't that low, It should still be in CC mode, and even in CV mode would draw more current than that, I think.

author: qwaarjet
author_rank: Regular Contributor
timestamp: September 19, 2015, 12:00:25 am
content: ok something probably broken thendo you have any other parameters available:battery currentvoltage across inductor with a scopeis it switching?is it soldered correctly? QFN is hard to do by handDoes the voltage on all the parts make since?Are all the component values right?I never used the 4001 but I have used the 4000-1 which is somewhat more complex and I had to measure the voltage on each pin to find the state it should be in and ultimately find the value that was inconsistent with correct operation. Ultimately it was an incorrect voltage divider

author: snowluck2345
author_rank: Newbie
timestamp: September 19, 2015, 01:26:24 am
content: I will look into it more on monday.I am pretty confident the chip is soldered correctly, I inspected the edges with a microscope afterwards and everything looked good, properly lined up.
Problems with DC analysis of integrator - Page 1
Forum section: electronics / projects

author: srtquery
author_rank: Newbie
timestamp: March 09, 2015, 06:57:14 pm
content: I am working on circuit to convert micro ampere current into voltage. For this purpose, I am using an integrator circuit using LMC6001 as the op-amp. I want to convert DC current in the micro ampere range into voltage. My circuit output for AC analysis matches with the simulation results, where the input is a sine wave or a square wave. Unfortunately, I get no circuit output for DC analysis, when the SPICE simulation software gives the correct output as calculated mathematically. I am using a feedback capacitor of 2nf and a resistor of 10M ohms as feedback resistance in the Integrator circuit. I am using these values of capacitance and resistor so that my integrator circuit can work with in a frequency range of 8-20 Hz.In DC analysis, for discharging the capacitor I am using a JFET (2N4117) that has to be given a clock pulse with a period of 50ms and the JFET will be switched off for 1msec. I want my capacitor to discharge in this 1ms and then start integrating once again for the next 49ms. For the rest of the 49ms, the JFET will not be working as it will be in open circuit. I am placing this JFET in such a way that the source and drain are across the feedback resistor and capacitor in the circuit. I am providing the gate with a clock pulse of amplitude of -5V for 49ms. This for the off condition and 0V for the rest of 1msec : this is the on condition for the JFET.The main problem in this circuit is that the switching action of the JFET works fine in AC analysis, but not in the DC analysis.I would be grateful for any help / suggestions.P.S : Do you think that it’s because of testing this micro ampere- range circuit on a breadboard ?Does any precaution needs to be taken for the circuit testing ? Any design changes that need to be done

author: dannyf
author_rank: Super Contributor
timestamp: March 09, 2015, 09:40:13 pm
content: The integration approach is best for really small current, like pa or fa range. For us range, an i-v convert would work - I just build one recently and posted some tests here.Your approach has quite a few flaws, btw.

author: moffy
author_rank: Super Contributor
timestamp: March 10, 2015, 03:12:16 am
content: the 2N4117 will inject charge at switch on and off, the clock pulse will be capacitively coupled into your integrating cap. Read the article "What's All this Femptoampere Stuff, anyhow?" by Robert Pease in "www-national-com_rap.pdf". Freely available, it will answer all your questions.
Problems with large neutral to earth caps?  - Page 1
Forum section: electronics / projects

author: BiOzZ
author_rank: Regular Contributor
timestamp: April 24, 2014, 07:20:15 am
content: I have an isolated switching power supply but there is a decent amount of neutral to earth voltages at around 70vRMS and gives you a nasty bite if you touch it and ground ... its only a few uA but im worried about frying my circuits when i start probing around on themit uses a fairly large looking round mains rated cap (sorry the value is pointing away from me .... but its clearly not trying to filter 60hz just hv spikes) between neutral and ground, i found that a large cap like 0.1u or 0.33u (mains rated) drops the voltage differential majorly in both AC and DC. are there any problems with this? does this affect my ground isolation? would this cause only nastier shocks?normally id leave this be, but as i plan to use this for general high current lab stuff i would like to have this a bit safer for me and the circuits under test

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 24, 2014, 07:52:44 am
content: If you can feel it, it ain't uA.Neutral is supposed to be bonded to ground at the breaker panel. Either your wiring is dangerously faulty and should be serviced as soon as possible, or you have more than just one cap from neutral in there.0.33u is way too much for a line-to-ground cap. 10nF is around the absolute maximum. And it must be Y1 rated.Tim

author: BiOzZ
author_rank: Regular Contributor
timestamp: April 24, 2014, 09:58:16 am
content: Quote from: T3sl4co1l on April 24, 2014, 07:52:44 amfirst point what you feel is not related to current but more closely related to wattage ... at 100v you can feel even in to the low uASecondly i dont think you understand what im saying, this is a power supply's isolated output neutral (aka 0v) not mains line neutral, this is a 0-24v DC switching power supply

author: Bored@Work
author_rank: Super Contributor
timestamp: April 24, 2014, 01:56:57 pm
content: Unplug it from mains, rotate the plug by 180°, plug it in again, check if there is still a problem.
Problems with the CX101BG LCD - Page 1
Forum section: electronics / projects

author: JimmyM
author_rank: Regular Contributor
timestamp: July 15, 2011, 02:55:17 am
content: I just got 2 CX101BG LCDs. They're the ones OK for common ground. I tried hooking them up like in Dave's schematic. No dice. I tried the schematic that came with the displays. Still no dice. Am I missing something? Perhaps Dave can pipe in with a tip or two. Dave's DaveCAD drawing doesn't show the Jumper between pins 5 and 8. But with Dave's schematic the voltage connected the voltage at pins 6 and 7 shows the same voltage as at the input before all the resistors. It's like the COM pin isn't connected to ground and thus the voltage divider doesn't divide.Information on the CX101BG is hard to come by on the net.

author: JimmyM
author_rank: Regular Contributor
timestamp: July 17, 2011, 02:20:06 pm
content: I hate to bump my own post, Buuuut Bump.I found some additional info regarding the CX101BG herehttp://www.edaboard.com/thread123247.htmland have posted my own question there as well. Here -http://www.edaboard.com/thread218888.htmlI have connected it differently and now I get readings. But they're way off.Does anyone here have any thoughts? Dave got his working just fine. How are mine not working?

author: JimmyM
author_rank: Regular Contributor
timestamp: July 18, 2011, 07:25:19 pm
content: OK. I got them working. I'm not quite sure how Dave got his working the way he showed it, but I got some info from edaboard and that got me on the right track. My Dummy Load is just about complete. It's got an Amps display up to 1.999V and a volts display up to 19.99V as well as a 10 turn pot for adjustment. I have internal pots for calibrating the volts and amps displays. I'm using a 0.15 Ohm resistor as the current sense shunt. I just use a different divider for the amps display and it all works out very nicely. Now I don't have to have 2 heat generating devices. Just the FET which is an IRL8113 (100+W dissipation).

author: J4e8a16n
author_rank: Regular Contributor
timestamp: August 12, 2012, 02:26:34 pm
content: It would be nice to have a shematic :-)JP

author: J4e8a16n
author_rank: Regular Contributor
timestamp: August 23, 2012, 09:59:15 am
content: Quote from: JimmyM on July 15, 2011, 02:55:17 amThere is a 100k resistor between pin 5 and 8.Here is a link:http://pianointune.blogspot.ca/2011/04/voltage-division-with-coarse-and-fine.html

author: J4e8a16n
author_rank: Regular Contributor
timestamp: August 23, 2012, 10:04:11 am
content: Quote from: JimmyM on July 18, 2011, 07:25:19 pmThe shunt is between pins 5 and 8?JP

author: J4e8a16n
author_rank: Regular Contributor
timestamp: August 24, 2012, 01:39:18 pm
content: Quote from: JimmyM on July 18, 2011, 07:25:19 pmWhe are very happy for you and dont forget to keep your secret. :-)
Processor upgrade in an Agilent Infiniium MSO/DSO 9000 scope? - Page 1
Forum section: electronics / projects

author: F1GWR
author_rank: Regular Contributor
timestamp: August 24, 2024, 10:51:25 pm
content: Hi,Did anyone succeed to speed up processing in win XP based Infiniium 9000 scopes? (I already swapped the original Fujitsu 2.5" drive by an SSD after DDing its contents)Made some search here. Found Intel M370, M385, T7600 but are they electrically compatible?Furthermore some of them have socket M and P versions available.After that question is: will BIOS be compatible?So upgrade seems risky business without authoritative advice...

author: squadchannel
author_rank: Frequent Contributor
timestamp: August 25, 2024, 03:12:09 am
content: From the block diagram, USB is used for communication with the scope's acquisition.Is the current CPU and memory usage close to 100%?If the bottleneck is not the CPU or memory, but the USB transfer rate, changing the CPU or memory to make it faster will not change anything; it will only make Windows run faster.MOD:https://www.eevblog.com/forum/testgear/agilentkeysight-infiniium-mso9000-series-motherboard-repairupgrade/This post says that it is PCIe connected. This seems different from what is stated in the block diagram.Either way, USB or PCIe, it does not make sense to upgrade CPU or memory if the bottleneck is not CPU or memory, but bus speed.

author: F1GWR
author_rank: Regular Contributor
timestamp: August 25, 2024, 11:18:02 am
content: Thanks for your contribution.Communication between MB and Acq board is done by two SATA cables.I can't check processor load right now as the scope unfortunately doesn't power up due to one PSU supervisor shut-down and things are currently under investigation. Therefore speeding things up would be the next step. Main concerns are : traces throughput (in waveforms/sec) and render the bandwidth limit processing reasonnably fast enough.I already saw that MB upgrade thread but seems it's not an easy task... Therefore the expected half-way solution of processor upgrade...

author: coromonadalix
author_rank: Super Contributor
timestamp: August 25, 2024, 12:07:33 pm
content: always check you background processes, you could have some who suck resources or not useful at alli had in an old tds 7254bxp came with crap in the days

author: F1GWR
author_rank: Regular Contributor
timestamp: August 26, 2024, 09:01:57 pm
content: Quote from: squadchannel on August 25, 2024, 03:12:09 amSo my 9404A fired up again. I checked XP system processor load. When running the DSO app it jumps from around 10 % to a 96-97 %. So answer is yes. And bandwith limit adds a tremendous amount of interleave between acquisitions.Therefore it seems that neither SATA nor bus are the culprits as when I revert to 4 GHz bandwidth traces throughput on display is way faster.
Producing a cheap nixie tube socket from D-Sub connector.  - Page 1
Forum section: electronics / projects

author: `
author_rank: Newbie
timestamp: June 15, 2016, 06:47:51 am
content: The original Bakelite vacuum tube sockets for a lot of nixie tubes like IV-18 are only really available as pulls from old military gear and are getting increasingly expensive. There's a solution mentioned as a comment Mike's electric stuff that you can use the pressed metal inserts fromPCB mount female DB9 connectorsas a cheap replacement, I thought I'd give this a try.The pins are extremely easy to remove from the connector by drilling out the retaining rivet, they appear to be gold plated.A quick board (circular-layout.ulp) to test how the sockets fit, leaving the drills pretty slack to take into account the amount of variety in the tube bases. I had originally intended to bed the pins down to the middle collar but decided using them at their full length would allow for more flexibility.The center drill will be reduced when used for real, it's not necessary for this particular tube but the pip length varies enough that it's necessary to prevent fouling. These particular tubes contain mercury giver pellets which would be unfortunate to break.Not having any routing space in the middle makes layouts with a lot of tubes extremely challenging, I've found it best to avoid that if at all possible.The only way to reasonably solder these in was to have a tube inserted in the socket during assembly, for a final build up I'll have to be extremely careful to have the splits in the pins around the same way, it looks a little messy otherwise and these pins will be a visible part of the product. There's enough slop in this setup that even my most bent tube looks completely normal when seated in this board.In all a significantly better solution than I was imagining it to be, total cost was tens of cents per socket.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 15, 2016, 06:37:22 pm
content: If you don't want to (or don't have) D-sub connectors to pillage, you can get Mill-Max PC mount pins. They're rather expensive, but the result is still cheaper than buying NOS sockets.Tim

author: Paul Moir
author_rank: Frequent Contributor
timestamp: June 15, 2016, 07:45:07 pm
content: I wonder if you could make a pin holding jig out of spare PCB space? Even one layer would help, or you could stack up a few layers.

author: `
author_rank: Newbie
timestamp: June 16, 2016, 04:05:25 pm
content: Quote from: Paul Moir on June 15, 2016, 07:45:07 pmDefinitely scope for that, I found that using the tube was enough for my purposes though. The pin inserts have such a low thermal capacity that there's no chance of it doing any damage to the dumet seals of the tube. If I was making a significant number of these I would probably make a jig that has rising male pins which are populated with the inserts and then the PCB is slid over the top for soldering.
Product ambient temperature ratings and testing - Page 1
Forum section: electronics / projects

author: Eric_the_EE
author_rank: Contributor
timestamp: May 29, 2019, 09:51:45 pm
content: I am in the process of testing an electronic device for min/max ambient operating temperatures. Currently, the device is operating in an environmental chamber at the rating extremes, but I'd like to learn more about how others verify temperature ratings. Proof of test is required, so I cannot just use the temperature rating of the weakest component in the BOM.In particular, I've been looking for an IEC/EN standard that specifies test parameters and execution for a given rating.For example, if my product is rated for 70 Celsius at 85% RH, what temperature and RH should I test at? How long should the test be? What is professional verification of the rating?Anyone know of any standards that address this? What temperature verification methods do you use?

author: Eric_the_EE
author_rank: Contributor
timestamp: May 30, 2019, 09:32:21 pm
content: Post update.After digging a while longer through commercial test reports and the IEC web store, I found some standards that I will be referencing for my application.Maybe these notes will help someone else someday looking for similar info.IEC-61131-2:2017 Industrial-process measurement and control – Programmable controllers – Part 2: Equipment requirements and tests. Specifically, the test will fulfill the requirements for Table 4 - Dry-Heat Withstand Test and Table 5 – Cold Withstand Test.IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: ColdSpecifically, the test will be completed with severity (temperature and duration of exposure) specified in section 6.6.1 Temperature and section 6.6.2 Duration.IEC-60068-2-2, Environmental Testing – Part 2-2: Tests – Test B: Dry Heat.Specifically, the test will be completed with severity (temperature and duration of exposure) specified in section 6.5.2 Temperature and section 6.5.3 Duration.
Product Description for EMC Test - Page 1
Forum section: electronics / projects

author: firasgany7
author_rank: Newbie
timestamp: January 06, 2021, 11:17:03 am
content: I'm writing a document that should explain about a mini-PC in my company in order to give information for EMC test engineers who don't know the product.The mini-PC introduces high granularity modular design and parametric enclosure.This is the product specification file.https://s3.amazonaws.com/fit-iot/tensor-pc/docs/introduction-to-tensor-pc.pdfI'm intending to make a one page brief overview of the product that could be useful before performing the EMC test and decide whether the device should be eligible for FCC Mark.I was wondering what are the product-related parameters, specifications, description that should be in the document in order to give a previous knowledge for the EMC engineers before performing the test.Here are some aspects that I thought of:-Power-Extensions for mini-PC-different enclosures for the SBC (including dimensions, Height, cooling ribs)-PCB Specs (number of Layers, diff traces impedance, single traces impedance)What do you think about these aspects, and can you suggest me more ideas?

author: Pack34
author_rank: Frequent Contributor
timestamp: January 08, 2021, 04:29:19 pm
content: Typically I would hand over the product manual so they can use the device.Typically this would have:1. Power requirements (110/220, etc)2. Wiring diagram (if you have ports, what do they connect to?)3. Getting Started (how the customer would go from box to hello-world)4. How do you use the device and software (be sure to focus on the intended operating mode)I'd be sure to put together some form of clean wire harness for any connectors on the device since they will need to be connected and plugged into something. If this is more than two cables I always bundle them so it makes their job easier.

author: firasgany7
author_rank: Newbie
timestamp: January 09, 2021, 08:26:52 am
content: Thanks Pack34, I really appreciate it.
Product Design Questions - Page 1
Forum section: electronics / projects

author: themacman33
author_rank: Contributor
timestamp: April 05, 2014, 10:01:43 pm
content: I am using Eagle to design my first product! I already have a schematic drawn out on paper, but I am having problems finding components and Eagle files.For example, I need a SMD 10uF 25V capacitor. I found a Panasonic one, but they don't give you the package type or CAD files.What should I do? How do professionals pick components and find Eagle files?Thanks!-Mac

author: madires
author_rank: Super Contributor
timestamp: April 05, 2014, 10:32:56 pm
content: Please check the RCL lib.BTW, there's an Eagle area athttps://www.eevblog.com/forum/eagle/;-)

author: themacman33
author_rank: Contributor
timestamp: April 05, 2014, 11:25:36 pm
content: Haha! I didn't see that!Thanks.

author: kizzap
author_rank: Unknown
timestamp: April 06, 2014, 09:50:45 am
content: if you struggle to find things use *. It gives any matching parts with those letters in it

author: made2hack
author_rank: Frequent Contributor
timestamp: April 07, 2014, 05:38:44 pm
content: Element 14's website has a section called theknode, where you can download a bunch of Eagle Cad libraries from different manufacturers.theknodeThere are the Eagle Cadsoft Libraries of components on their website:Eagle LibraryHere is a how to make your own package tutorial from dangerous prototypesHow to make parts in Cadsoft EagleIf I don't find the package, I sometimes find it is faster to create your own in Eagle using the datasheet as opposed to finding the eagle library online.
Product idea. 'Watchdog' mains power timer. - Page 1
Forum section: electronics / projects

author: philbx1
author_rank: Regular Contributor
timestamp: October 15, 2011, 06:36:41 am
content: Hi all,Just had a thought about a possible project.This is basically just an adjustable timer circuit that cuts power if it hasn't been switchedoff after a predetermined period.This is NOT a countdown timer as such, just something that would start timing once power is appliedand shut off a relay if the timeout had elapsed.I'm thinking uses like air conditioners, soldering irons, clothes irons, watering timers (even TV's etc.).

author: Zero999
author_rank: Super Contributor
timestamp: October 15, 2011, 03:11:46 pm
content: You can buy timer relays to do that.
Product idea:  Wearable Smart Watch charge pack - Page 1
Forum section: electronics / projects

author: paulca
author_rank: Super Contributor
timestamp: July 02, 2024, 05:55:28 pm
content: I hate charging my smart watch. I hate taking my watch off at all. I can attach the magnetic charge lead to the watch while I wear it, but unless I am really on the ball I have a tendency to walk off while cabled, taking the powerbank or the whole USB hub with me.I thought as a PoC it would be very easy to take a small power bank, a much shortened charge lead and just wear the power bank on my arm.So that led to... if I used very thin PCB to mount the magnets and pogo pins, then used a bit of flexi-pcb to get out from under the watch and a small 200mAh lithium cell + smd boost converter to make 5V.When I wondered, why does nobody make this, the answer is obvious. Every damn watch has a different damn connector.So. Why can't the end of that "ribbon PCB" now just be contacts which are inserted into <your phones charge adapter>I figure, as most watches are only like 100mAh or less, that a similar sized (or half the size) pouch cell could be supported by the watch itself, maybe 2 plastic rods to stop it flapping around.So, the lithium cell + boost converter in a nice little case, a ribbon connector/flexiPCB under the watch with a couple of tiny plastic or aluminium rods for rigitity and ... one of a selection of end connector modules for your watch docking port.In case I am missing anyone. You put the device under your watch, it snaps to the docking connector and charges the watch. No leads tying you down. When the watch is charged (an hour or two), just take the device off and put it on charge.It's academic, or free for exploitation as I have no interest in developing such a product. I'm probably going to settle for the smaller power bank I can find and a watch strap.
Product teardown: Verizon (Wistron NeWeb Corporation) CR1000A WiFi 6E Router - Page 1
Forum section: electronics / projects

author: nexus
author_rank: Regular Contributor
timestamp: December 01, 2023, 06:03:22 pm
content: Another teardown. This time its a late model CR1000A WiFi 6E (6 GHz capable) router made by Wistron NeWeb of Taiwan for Verizon.Enjoy:https://neonkev.com/2023/12/01/product-teardown-verizon-wistron-neweb-corporation-cr1000a-wifi-6e-router-teardown/
Product teardown: Verizon E3200 (Arcadyan WG9116B) WiFi 6 Extender - Page 1
Forum section: electronics / projects

author: nexus
author_rank: Regular Contributor
timestamp: November 12, 2023, 12:32:19 am
content: Hi all,Out of curiosity, I took a peek inside of a fairly late model WiFi 6 extender product from Verizon (actual OEM is Arcadyan Tech Corp. in Taiwan).This teardown includes a close look at the digital and RF boards, and some return loss measurements I did on the antennas because why not?Enjoy:https://neonkev.com/2023/11/12/product-teardown-verizon-e3200-arcadyan-wg9116b-wifi-6-extender/
Production Hipot tester makes LED lamps malfunction during production test. - Page 1
Forum section: electronics / projects

author: ocset
author_rank: Super Contributor
timestamp: May 15, 2018, 07:10:58 am
content: Hello,Please assist us with our Production test equipment, because it seems to interfere with our product on the production line..We have a HAL104 production tester for our offline, DALI dimmable , non-isolated 40W LED lamps.During production, we connect our lamps to the mains via this HAL tester. The HAL tester then does a high voltage test between live/neutral inputs and earth. Then, with our lamps still connected to the mains via the HAL tester (there seems no reason to disconnect them), we connect a comms cable to the lamp’s DALI input (optocoupler isolated from lamp's microcontroller) and configure the lamp with operation parameters such as…..Maximum dimming level...Shutdown temperature...etc, etcAnyway, the configuration program in the lamps’s microcontroller receives the configuration input as a stream of bytes…..it then acknowledges by replying back with what bytes it “thinks” it just got sent. If the “sent” bytes, and “reply back” bytes, don’t correspond, then the Configuration App in the laptop reports “Fail to Configure Lamp”.Anyway, when the lamps are connected to the mains via the HAL tester, about 20% of the time they “Fail to Configure Lamp”.Though whenever the lamps are just connected to the mains directly (not via the HAL tester), they always configure correctly.Lamps that “Fail to Configure Lamp” on the HAL tester, always configure correctly if subsequently connected to the mains directly.Do you have any ideas why the lamps often “Fail to Configure Lamp” when connected to the mains via the HAL tester?(incidentally, these LED lamps are linear regulator based and don’t have a Common mode or differential mode mains input filter. ..Well, there is a small amount of capacitance to give some diff mode filtering)Seaward HAL tester (HAL104)https://www.tester.co.uk/seaward-clare-hal-led-safety-tester?gclid=EAIaIQobChMIwO-qopGH2wIVxhbTCh0HmQAUEAAYAyAAEgKNJfD_BwEDALI optocouplers used are TCLT1009https://www.vishay.com/docs/83515/tclt1000.pdf

author: Whales
author_rank: Super Contributor
timestamp: May 15, 2018, 07:48:50 am
content: Daft question: what's the timing of all of this? How big are the delays between running the tests and talking to the micro?

author: ocset
author_rank: Super Contributor
timestamp: May 15, 2018, 07:55:32 am
content: Thanks, ..talking to the micro happens immediately after the HAL104 tests are run.By the way, the lamps PCB doesnt have an earth connection , but the lamp pcb sits on an earthed heatsink (on a thermal pad)

author: Whales
author_rank: Super Contributor
timestamp: May 15, 2018, 08:17:08 am
content: A long list of possible causes come to mind, but have you just tried inserting a short delay (eg 500ms) between those steps?EDIT: thoughts are along the lines of "HAL104 claiming that it's finished is not the same as it's effects actually finishing".
Products from maccdaq.com? - Page 1
Forum section: electronics / projects

author: iceisfun
author_rank: Regular Contributor
timestamp: January 20, 2014, 03:32:24 am
content: Does anyone work with maccdaq DIO boards?Wanting to link it against Visual Studio 2012 c++.It looks awesome but it does cost quite a bit and I would like to know how well it works and if there are any pitfalls I should be aware of?Above mentioned cardhttp://www.mccdaq.com/pci-data-acquisition/PCIe-DIO96H.aspx
professional electrostatic voltmeter probe? - Page 1
Forum section: electronics / projects

author: sarepairman2
author_rank: Frequent Contributor
timestamp: September 26, 2015, 05:33:50 pm
content: Has anyone here ever taken apart a professional electrostatic voltmeter probe? I get the sense of how one might work with a chopper etc, but I would like to read about the mechanical design etc that goes into one.

author: Gyro
author_rank: Super Contributor
timestamp: September 26, 2015, 05:49:41 pm
content: If you Google 'Field Mill Voltmeter' you should get some useful hits.

author: sarepairman2
author_rank: Frequent Contributor
timestamp: September 26, 2015, 07:16:27 pm
content: Well I saw a website that shows you how to build one, infact I have gathered the parts to build one, but I wanted to see what the "final evolution" of the mechanical design/etc is, unlike mine that will be built out of a CDROM motor and an old flash light tube.
Professor Cuk's TeslaCo training - Page 1
Forum section: electronics / projects

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: December 04, 2020, 02:47:09 pm
content: Has anyone taken Professor Cuk's power electronics "master class" training courses, either online or in-person? Feedback?https://teslaco.com/courses/

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: December 05, 2020, 02:43:40 pm
content: Well, I'll find out in March. Signed up thru work.

author: Yansi
author_rank: Super Contributor
timestamp: December 05, 2020, 02:59:43 pm
content: As an individual, I find the pricing offensive.

author: sclafa
author_rank: Newbie
timestamp: January 07, 2022, 07:04:54 pm
content: How did it go? I'm considering signing up myself.

author: Evan.Cornell
author_rank: Regular Contributor
timestamp: January 07, 2022, 07:48:06 pm
content: Quote from: sclafa on January 07, 2022, 07:04:54 pmDidn't end up attending.. changed employers, so presumably someone else did it instead.
Programmable Dalay Line Chips - Page 1
Forum section: electronics / projects

author: Timisthen
author_rank: Newbie
timestamp: October 09, 2015, 05:00:50 pm
content: I have a pile of programmable delay line chips I ended up with a while back, and I haven't the foggiest idea what to do with them.I want to do something with them, even if it's awful and abusive, so long as it's cool.I have, 6 PDU18F-.5's, 4 PDU1064H-1's, 3 PDU54-100's, 6 PDU16F-0.5's, and 2 PDU1016-1's. The datasheets are easy to find just by googling the chip number.If anyone has any ideas, I'd love to know what I could do with these. To my knowledge, they've never been used.

author: LaserSteve
author_rank: Super Contributor
timestamp: October 11, 2015, 01:26:35 am
content: Those chips have many applications in signal processing and spread spectrum communications or Radar.. However the best idea I have for useful "civilian use" is a programmable delay line oscillator.Steve

author: Timisthen
author_rank: Newbie
timestamp: October 11, 2015, 02:36:54 am
content: Quote from: LaserSteve on October 11, 2015, 01:26:35 amHmm... I may have to look more into all those applications. I never did say that I needed it to be useful.Can't be more useless to me than my, brand new, Altera EPX780-10.Well, EPX780QC132-10 to be specific, no clue what that means. I know next to nothing about PLD's.So, if I decide to destroy any of the chips, I'll keep at least a couple of each.Any ideas from anyone how to try and abuse/cook them though?Quote from: blueskull on October 11, 2015, 02:18:40 amThis sounds like it could be a good thing to tinker on to pass time.May look into this one too.

author: LaserSteve
author_rank: Super Contributor
timestamp: October 11, 2015, 03:27:27 am
content: Sounds like your too new at this for FM chirp radar or Hilbert Transform, so lets stick to making an oscillator...Or keep them ALL in a drawer for a while.They are probably an ITAR item, so please don't sell on Ebay and ship outside the US.Steve

author: Timisthen
author_rank: Newbie
timestamp: October 11, 2015, 04:29:06 am
content: I have no intention of parting with any of my components unless they're broken. It that happens they go in the trash.As for how new I am, I do know what a delay line is, and even have a decent idea of what they're used for. It's the "Programmable" bit that has me baffled. (Well, again I understand the concept, but not sure how it's applied.)Though I do probably need to read more about communications engineering. I have plenty of books, just haven't read through them yet, though I do intend to do so.
Programmable Interval Timers to read SRAMs - Page 1
Forum section: electronics / projects

author: D4rmond
author_rank: Newbie
timestamp: May 12, 2015, 05:48:56 pm
content: Hi there! (sorry if I do some grammatical mistakes but I'm not english xD)I'm looking forward to building a special waveform generator in the audio frequency range. I'll write the waveform on the SRAM with an Arduino or something similar. The waveform will be drawn from a special software with my pc. But that's not what I'm asking for.I'm in struggle with the "scanning" of the sram. With the help of excel, I found that it takes about 6MHz for getting on the output a sinewave at 4186Hz (C8 on the keyboard, that's my target).Therefore that will be my frequency limit. But I have to give at the binary counter (the one that scans the ram) any frequency starting from 1Hz (it has to be as low as possible, it doesn't need to be necessarily 1Hz) to about 6MHz. I found on google that I'll need some Programmable Interval Timers such as Intel 8253 or something like that. I have no idea about programming it and I'd like to use something that can do the "dirty job" but at the same time could be something I can program or at least understand.Any ideas? Do you know some PITs that are much easier to use instead of the Intel 8253? And if not, do you have any resources for the 8253?Thanks a lot for future replies.
Programmable RC Car: How-To Guide - Page 1
Forum section: electronics / projects

author: JBionics
author_rank: Newbie
timestamp: August 28, 2012, 08:21:57 pm
content: (First Post)I've hacked a generic $9 RC car's remote to add speed control (via PWM), make it programmable, and to let users drive the car using the keyboard or a gamepad. I've put together a step-by-step how-to guide so that others can make their own.The project was done using an Arduino Uno and a ULN2803 darlington transistor array IC. All hardware schematics and software source code is available to download and modify.Seehttp://jbprojects.net/articles/programmable-rc/.Any suggestions for improvement or enhancement?
Programmable Rotary Attenuator 5-10GHz waveguide test teardown - Page 1
Forum section: electronics / projects

author: oz2cpu
author_rank: Frequent Contributor
timestamp: May 13, 2022, 08:06:50 am
content: my latest video release :Flann Microwave Instruments Programmable Rotary Attenuator 5-10GHz waveguide Test Teardownhttps://youtu.be/DL6dcSfBBbAreally cool design, i always love to get special RF products
Programmable sine wave oscillator  - Page 1
Forum section: electronics / projects

author: AcHmed99
author_rank: Contributor
timestamp: April 04, 2011, 01:50:42 pm
content: A

author: deephaven
author_rank: Frequent Contributor
timestamp: April 04, 2011, 02:03:53 pm
content: Quote from: AcHmed99 on April 04, 2011, 01:50:42 pmAs the exact frequencies probably aren't that critical, you could make a free-running oscillator, either three different ones for the three frequencies or one with switched capacitors controlled by mosfets. Then feed the outputs into active low-pass filters using an op-amp or two. The design could be quite compact as you could use SOT23 op-amps, or SO8 dual op-amps. If you wanted the frequncy to be a little more accurate, you could program a small pic (or use your existing controller) to output the right frequencies and the feed the low-pass filter as before.

author: scrat
author_rank: Frequent Contributor
timestamp: April 04, 2011, 02:14:52 pm
content: I see a few ways for doing this: a PLL made by an analog sine output VCO and (squarer +) programmable divider feedback (but I doubt there are any VCO ICs working at 120Hz), filtered PWM or DAC.PWM should be the most economical. With a 500kHz carrier PWM, even with a 48MHz MCU (e.g. a cheap PIC) you have about 1% resolution (48M/500k = 96), there can be multiple outputs and it can deal with receiving customized I2C commands.

author: Jon Chandler
author_rank: Frequent Contributor
timestamp: April 04, 2011, 06:39:59 pm
content: EDN had an interesting Design Idea in the September 1st, 2006 edition for a sine generator. It uses a programmable clock chip and a switched capacitor filter to filter out the harmonics of the square wave. They use a PC parallel port interface to control the I2C clock chip but this can be eliminated and the clock chip added to your I2C bus. By my calculations, the 3rd harmonic is 64 dB down from the fundamental so the simple circuit yields reasonable results.The text of the original article is available at EDN but not the schematic as far as I can tell. Here's a copy of the original pdf plus some of my calculations.

author: Zero999
author_rank: Super Contributor
timestamp: April 04, 2011, 06:55:11 pm
content: What about doing it the old analogue way with a VCO?The LM399 can be used to make a triangle wave VCO tunable from 700Hz to 100kHz. It shouldn't be hard to increase the range by using a faster comparator and a relay to change the capacitor or resistor values for different ranges, see datasheet.http://www.national.com/ds/LM/LM139.pdfThe triangle can be converted to a sine using a wave shaping circuit, see below. I got the circuit from a website I can no longer find, if I do, I'll post a link.
Programmer box 3d print (STM8/32, MSP430 and AVR) - Page 1
Forum section: electronics / projects

author: alexanderbrevig
author_rank: Frequent Contributor
timestamp: April 27, 2015, 02:48:09 pm
content: I just made athingon Thingiverse today!Here it is:It's a box with:Olimex msp430-jtag-tiny-v2ST-Link/V2AVR ISP mk2It's kind of a hack, but in case any of you want to have one instead of three boxes on your desk - I thought I'd post it on here.
programming ATMEGA328p using PICKIT3 - Page 1
Forum section: electronics / projects

author: hussamaldean
author_rank: Unknown
timestamp: October 28, 2019, 03:11:40 pm
content: Dear all,I am currently learning MPLAB X to program both PIC and ATMEGA. anyway is there any way to upload the code to ATMEGA328p since I searched the web to figure out but I came up empty handedregards

author: Howardlong
author_rank: Super Contributor
timestamp: October 28, 2019, 04:15:43 pm
content: Quote from: hussamaldean on October 28, 2019, 03:11:40 pmPretty sure that Pickit3 is for PICs only, it was developed well before Atmel became part of Microchip.I did have some luck recently with a PICkit4 programming an ATTiny from MPLAB X, but it was reasonably hard work getting everything to work. In the end I went back to using Atmel Studio and an Atmel ICE, there are fewer unknowns that way. If you have to fight too hard with your debugging tools, IME you're probably better off taking a different approach.

author: hussamaldean
author_rank: Unknown
timestamp: October 28, 2019, 04:18:52 pm
content: Quote from: Howardlong on October 28, 2019, 04:15:43 pmseems I will use arduino as ICP with gui-avrdude

author: iMo
author_rank: Super Contributor
timestamp: October 28, 2019, 04:29:07 pm
content: This is a must for an atmel userUSBASP ProgrammerAdapter (optional)

author: hussamaldean
author_rank: Unknown
timestamp: October 29, 2019, 04:46:32 am
content: Quote from: imo on October 28, 2019, 04:29:07 pmI have this but it doesn't work with MPLAB X

author: iMo
author_rank: Super Contributor
timestamp: October 29, 2019, 05:22:45 am
content: FYI - GUI for your USBASP programmerhttp://khazama.com/project/programmer/

author: Ian.M
author_rank: Super Contributor
timestamp: October 29, 2019, 06:00:26 am
content: IIRC AVRdude supports the PICkit 2, and if you use Microchip's standalone PICkit 3 utility (see below), it will install PICkit 2 emulation firmware into your PICkit 3, which AFAIK is then good enough for AVRdude to see it.Give it a try and report back please.PICkit3 Programmer Application and Scripting Tool v3.10Don't forget to use the utility to revert back to MPLAB mode (disable PICkit 2 emulation), before trying to use your PICkit 3 with MPLAB again (or simply hold the button down when plugging in the USB to force bootloader mode so MPLAB reverts it for you).
Programming guide for apps on floppy disk for TDS500/600/700 series scopes? - Page 1
Forum section: electronics / projects

author: TERRA Operative
author_rank: Super Contributor
timestamp: August 26, 2025, 12:18:23 am
content: I'm just wondering if there is any programming guide available for writing apps for floppy drive use on TDS 500/600/700 series scopes?I've seen a few things around where people have written NVRAM and Calibration EEPROM dumpers etc with various internal GPIB and other commands that allow one to show the 'busy' clock icon and on-screen messages, but I have yet to find a manual detailing all the commands etc.I can find the usual Tektronix programmers manuals for communicating from a PC via GPIB, but nothing for a program to be put on floppy disk and run internally on the scope.Here is an example of what I am talking about from here:https://blog.mbirth.uk/2022/02/03/pimp-my-scope-unlocking-software-features-in-a-tektronix-tds784d.htmlCode:nulldev = open("/null",3,0666)taskSpawn "Redirect",1,0,0x4000,ioGlobalStdSet,1,nulldevtaskDelay (100)GpibInput("WAITICON OPEN")GpibInput("mess:box 80,80,450,200")GpibInput("mess:show \"\n\n\n\n Unlocking Option 2C for TDS 784D in 6 seconds.\n\nPOWER OFF NOW IF YOU HAVE DIFFERENT SCOPE!\"")taskDelay (600)GpibInput("PASSWORD PITBULL")GpibInput("WORDCONSTANT:ATPUT 327692,1")GpibInput("mess:show \"\n\n\n\nOption unlocked. (If not, check NVRAM protect switch!)\"")GpibInput("WAITICON CLOSE")GpibInput("bel")I have a few ideas I want to try out, and having access to available commands would be really helpful.Thanks!

author: colorburst
author_rank: Regular Contributor
timestamp: August 27, 2025, 04:22:54 am
content: I do not believe such a guide exists (for any scope) but people have figured out many things on their own. I suspect Tek didn't want other people to be able to write competing applications, and things like WORDCONSTANT would never show up in a public manual anyway.Take a look atthis projectby @iliasam, in which he managed to implement Tetris as a first-class application on a TDS540. It shows the steps to build the program as well as some of the prerequisite research.If you're thinking of similarly complex applications, it's probably going to be easier to write it in C with his toolchain as opposed to figuring out the vintage Java dev enivronment Tek used originally. Simple scripts it looks like you can just write as text files, but you'll still need to look into the firmware to learn the commands and functions.

author: TERRA Operative
author_rank: Super Contributor
timestamp: August 27, 2025, 06:54:43 am
content: Yeah, I assumed as much.Checking out the link now, thanks for that.My ultimate goal is to write a script to check the scope model number, check available memory (for 1M or 2M option), then enable all available options for that scope.Just stick a floppy disk (or USB stick if the gotek adapter is installed) and boot the scope for completely automatic option unlock.