hybridfree/eevblog-posts huggingface dataset:
Product certification - Page 1
Forum section: electronics / beginners

author: Ryan_!
author_rank: Newbie
timestamp: February 21, 2017, 07:49:02 am
content: Hello I'm an electrician and an electronics enthusist. I have designed a board that basically takes in serial information from an rs232 port, decodes it and sends it off to the cloud over 3g. My one time off solution for a client has drummed up a fair bit of demand. My question is, Is there any certification or design criteria required to sell a electronics product in Australia keeping in mind there is no AC in the product and the max voltage the product is 27vdc. I have tried to conduct research but nothing could be found. The two devices use a teensy2.3 and a particle electron

author: Benta
author_rank: Super Contributor
timestamp: February 21, 2017, 08:47:20 am
content: Most of all these certifications are beginning to look the same, no matter where you are in the world. I can only tell you the EU ones:R&TTE - this should be already taken care of if you use a certified 3G module, provided it only has a PCB antenna. If you use an external antenna, it has to be certified together with the module.Low Voltage directive - should be OKEMI directive - this is nasty and probably needs a certified lab for complianceRoHS/REACH - you'll need to do some paperwork hereBattery directive (provided your device has a battery)There might be some additional rules on fire hazards (eg, what happens if the battery is shorted)Cheers.

author: ebastler
author_rank: Super Contributor
timestamp: February 21, 2017, 05:01:35 pm
content: Quote from: Benta on February 21, 2017, 08:47:20 amI think those last two are largely European. Less directed at product performance, but at environmental aspects. You can add another one in this category for Europe, namely WEEE (i.e. the need to participate in some electronic waste collection and recycling scheme).The other requirements you listed are probably somewhat more harmonized across large parts of the world.For Europe, the amount of regulations makes it pretty impractical to market electronic niche products as a little side business (legally). If such products are directed at a techie user base, offering them as a kit makes life a bit easier.
Product development lifecycle and documentation - Page 1
Forum section: electronics / beginners

author: Griffin
author_rank: Unknown
timestamp: March 26, 2012, 06:22:00 pm
content: Hi every1After going through some of Dave's old videos I came across video #138 where he talks about the Top 5 tips for graduate engineers. In this he mentioned taking a project from start to finish documentation, design, testing and deployment. Basically the whole shebang and as a serious enthusiast I wanted to do this with a couple of my personal projects.Now I have researched the typical project lifecycle for this kind of project but I would like to know from the people who have done this a couple of times where I can get some good information as well as a few templates for the documents that are part of this lifecycle or a copy of such a complete project so I know where to start.I am working on both the software and hardware for this and would appreciate it if these information sources included both worlds.Thanks
ProFet BTS7008 Resistor IN calculation - Page 1
Forum section: electronics / beginners

author: misiek303
author_rank: Contributor
timestamp: April 29, 2023, 12:46:25 am
content: I am looking at the BTS7008 family and I can see that there is 4.7k for R(IN) value. I wonder how they come up with the value, I don't see the logic controller output voltage example anywhere. I know it would be probably 5V but still can't find the info about the voltage drop and amps to turn on the profet.Can you point me in the right direction please?https://www.infineon.com/dgdl/Infineon-BTS7008-2EPA-DataSheet-v01_20-EN.pdf?fileId=5546d46258fc0bc101590212356876b1

author: m k
author_rank: Super Contributor
timestamp: May 06, 2023, 04:02:06 pm
content: Since the other side is an external and unknown device only some educated guesses can be made.Arduino is giving 40mA for single pin, so 188V over 4.7k.
ProfiNET and ProfiBUS add to existing board - Page 1
Forum section: electronics / beginners

author: Yaroooo
author_rank: Regular Contributor
timestamp: March 10, 2022, 03:44:26 pm
content: Hello,I need to implement ProfiNET and ProfiBUS respectively in two different projects to communicate with a S7 PLC Siemens.What I've is a custom MCU board with RS485 interface. I want to choose most economic solution.I've some questions:- Is there libraries for ProfiBUS (something like Modbus) to easy integrate into fw?- Is there something like this also for ProfiNET? I would integrate just an ethernet port.Otherwise, is there cheap modules that perform translation between RS485/Modbus -> ProfiNET?

author: KaneTW
author_rank: Frequent Contributor
timestamp: March 10, 2022, 07:25:48 pm
content: Do you need to be standards compliant or is this DIY? Real-time? Data rate? Latency?
program arduino for lc7881 16 bit dac - Page 1
Forum section: electronics / beginners

author: dwc5496
author_rank: Newbie
timestamp: July 24, 2017, 02:27:37 am
content: s

author: danadak
author_rank: Super Contributor
timestamp: July 24, 2017, 11:15:41 am
content: The interface pretty simple bit banging serial, just a thought.Regards, Dana.

author: alexanderbrevig
author_rank: Frequent Contributor
timestamp: July 24, 2017, 01:05:26 pm
content: One thread is enough.https://www.eevblog.com/forum/microcontrollers/program-arduino-for-lc7881-16-bit-dac-92343/?topicseenShow us your attempt

author: Buriedcode
author_rank: Super Contributor
timestamp: July 25, 2017, 03:00:12 pm
content: I can see where you're going with that, and looking at the datasheet, it isn't quite as simple as a I2S-like interface. But some minor criticisms:"out" doesn't need to be a boolean array. Why can't it just be a 16-bit value - unsigned int? Generally serial bit banging, regardless of the protocol, uses bit shifting after each bit is sent out. eg:Code:out =<< 1;Google bit banging serial to see how others do this. It will generally be the same for SPI, UART, I2C, I2S etc.. some will have clock lines (SPI, I2C I2S). Although using a single bit array and looping through it does effectively the same thing, your array isn't a variable, so it only works for hard coded values.As you have a few 'clock' lines there, bit clock - BCLK, LRCLK, and two word clocks WCLK1/2, then as you have tried to do in your code, you must toggle these lines at the appropriate bitclock. In this case I would have a 'shadow mask' register, which stores the value that is to be written to the port (which has all the control lines on it), and write that to the port at the end of every bit clock transition. That way you 'update' WCLK1, WCLK2, BCLK, LRCLK and data all at the same time, rather than doing each one sequentially. Also, as you're bit banging the clock, I would use a counter for each transition. So for 48 it clocks, I would use a counter of 96. That way everything is synchronous to the clock edges, and you have complete control over timing.Example in pseudo-code:Code:for(i=0;i<96;i++)outputreg = 0; // clear our output register.if ((bitcount & 0x01)== 0)outputreg |= (1<<BCLK_PIN) // set clock high. Otherwise it remains low.if (8 < bitcount < 29)outputreg |= (1<<BCLK_PIN) // set LRCLK high if its within range.if (22 < bitcount < 42)outputreg |= (1<<WCLK1_PIN) // set WCLK1 high if its within range.if (72 < bitcount < 92)outputreg |= (1<<WCLK2_PIN) // set WCLK2high if its within range.if (bitcount == 9)// start sending first word, LSB first; resets datacounter in preparation for bitshifting....outputPORT = outputregdelay_halfbitperiodetc..It might look even more convoluted that your current work, but once you have it working - more or less) you can adjust the range values, add another data line, or shift them.I'll admit, after looking at the datasheet, its not a particularly pleasant protocol. But certainly doable when bit banging.edit: far too many typos.
program ATMEGA2560 (arduino mega) in circuit - Page 1
Forum section: electronics / beginners

author: SnakeBite
author_rank: Regular Contributor
timestamp: June 05, 2014, 01:41:58 pm
content: Hi,i designing a PCB that include arduino mega 2560 microcontroller and i'd like to program it in circuit using arduino mega board that the microcontroller on it has been removed. which pins i need to connect to which pins in the arduino board? i do have 5v on my pcb and a local 16MHZ crystal.thanksIdo

author: retrolefty
author_rank: Super Contributor
timestamp: June 05, 2014, 03:33:59 pm
content: First you have to decide what method you wish to program it in, ICSP or USB serial via a installed bootloader?

author: SnakeBite
author_rank: Regular Contributor
timestamp: June 05, 2014, 10:38:56 pm
content: I want the simplest way. i don't want to include more circuitry just to connect the mega2560 to exist arduino board (arduino mega) that doesn't have the microcontroller on it (desoldered from the board). how can i connect it?

author: retrolefty
author_rank: Super Contributor
timestamp: June 05, 2014, 10:48:32 pm
content: Quote from: SnakeBite on June 05, 2014, 10:38:56 pmOk, lets assume you have a arduino Mega board with it's micro chip removed, and on your 'target' PCB you have a ATmega2560 chip that has the proper arduino bootloader already installed in it. The hook-up would be as follows:Arduino shield pin name ATmega2560 chip pin number on custom PCBD0 serial rec 2D1 serial tx 3GND (any ground pin) PCB groundRST (reset pin) 30This also assumes your custom PCB supplies the needed +5vdc for it's chip, if not you could also jumper shield 5V pin to the Vcc bus of your PCB if the current requirements are within the USB current limit.

author: SnakeBite
author_rank: Regular Contributor
timestamp: June 05, 2014, 11:02:02 pm
content: i have 5v on my pcb and also i have 16MHZ crystal.thanks for your help!
Program for drawing circuits for reports? - Page 1
Forum section: electronics / beginners

author: Jolle
author_rank: Contributor
timestamp: February 20, 2015, 11:59:42 am
content: I am looking for a program to draw circuits that can produce nice and clear drawings without having to spend hours aligning connections and drawing all the components myself. I have tried microsoft visio but my urge to kill someone increases linearly with the time spend with the programI really like the drawing system in LT spice and how everything snaps together, but since the figures is going to be used in a more serious report it would be nice if it was possible to write subscript text and specifying the line thickness.Does anybody know of a program that can do this beside visio? Or is visio the only possibility when I only want it to look good?

author: free_electron
author_rank: Super Contributor
timestamp: February 20, 2015, 02:53:27 pm
content: inkscape

author: Lukas
author_rank: Frequent Contributor
timestamp: February 20, 2015, 03:28:44 pm
content: If the circuits are simple and you have lots of time, you may try circuitikz. (Even if you don't use latex, just convert the pdf to a vector format your word processor understands).A while back, I've hacked a python script that takes an ltspice .asc schematic file and converts it to tikz for embedding in latex documents. This allows me to use latex markup in labels etc. Unfortunately, it messes up text positioning and is rather ugly...

author: Zero999
author_rank: Super Contributor
timestamp: February 20, 2015, 08:20:43 pm
content: LTSpice can output schematics in WMF format which can then be edited to change the line width, imported into a word processor or converted to another format.EDIT:WMF files are crap. You're much better printing the file to PDF (using a PDF print driver such as PDF creator) and importing it into a program which can edit PDF files, such as Inkscape.
program / software to the microchip - Page 1
Forum section: electronics / beginners

author: Pulpo
author_rank: Newbie
timestamp: November 04, 2012, 03:57:01 am
content: GreetingsMost of this environment is bewildering.I have built a small device using an Arduino.A couple of neigbours saw it and want one.For lots of reasons I cannot really sell them what I have, its simply not robust enough.So I though I would have a PCB made, as a few others may want one.And the person / company who will help me design and make the PCB will have to help with components and schematics.But how do I get the program / code from my computer onto the chip?The Arduino has a boot loader to assist, but don't think I want one for my gadget.Maybe there is some sort of product that I can plug the chip into download the code and unplug the chip ready to be solder to the PCB?If there are some good links to assist would appreciate.Or any suggestions or thoughts would be appreciated.ThanksPulpo

author: notsob
author_rank: Frequent Contributor
timestamp: November 04, 2012, 04:18:42 am
content: be careful using the word 'microchip' - it is an actual brand name of a chip manufacturer.Probably better if you used 'microcontroller'

author: fazz33
author_rank: Newbie
timestamp: November 04, 2012, 04:21:26 am
content: Ah, beat me to the punch. Anyways I think what you are looking for is an Atmel programmer of sorts. Like this one (http://store.atmel.com/PartDetail.aspx?q=p:10500054) if you plan to use the same atmel chip in the arduinos

author: Pulpo
author_rank: Newbie
timestamp: November 04, 2012, 11:23:57 am
content: Micro controller got it.That is exactly what I'm looking for I think.Many ThanksPulpo

author: fazz33
author_rank: Newbie
timestamp: November 04, 2012, 04:43:06 pm
content: No problemBest of luck!

author: AndreasF
author_rank: Frequent Contributor
timestamp: November 04, 2012, 09:43:46 pm
content: There are also ways of using your existing Arduino to program other AVR controllers (either with the Arduino bootloader or a bare bones firmware). A quick Google search of "use arduino to burn bootloader" or similar will give you plenty of results.
Programable DC Load, Silicon Chip Kit - Page 1
Forum section: electronics / beginners

author: C-47
author_rank: Regular Contributor
timestamp: July 12, 2024, 08:19:05 am
content: Hi,Has anyone built the above kit published Sept / Oct 2022, any comments.I'm considering having a go at it, mainly due cost compared to a commercial unit. Thanks, Alan.

author: perieanuo
author_rank: Frequent Contributor
timestamp: July 12, 2024, 08:43:21 am
content: You can just build one with one operational and some parallel mosfets on a radiator and attach a esphome If you want wifi. You have q challenge to set the esp to control the load, but it's not complicated.If design maters for you buy that one.I have lot of equipment in my work lab, scpi sw control made by me in Python including gui, zero are wifi-linked.why wifi? If your DUT îs smoking you're gonna stop it with wifi?

author: C-47
author_rank: Regular Contributor
timestamp: July 13, 2024, 10:35:59 am
content: Thank you for the reply, certainly some items to be considered before advancing. Alan.
Programmable AC Source out of inverter and porgrammable DC power supply - Page 1
Forum section: electronics / beginners

author: Michal Mytnik
author_rank: Newbie
timestamp: June 24, 2023, 07:58:37 pm
content: Hi,since Programmable AC Sources are rather expensive, I was wondering if an idea of using Inverter (which is rather cheap) and supplying it with 12/24V from DC bench power supply and controlling DC current make any sense?Any bright idea, someone tried that?

author: Benta
author_rank: Super Contributor
timestamp: June 24, 2023, 09:05:19 pm
content: Won't work.It would be a little like putting a dimmer on the mains wire to your TV to control the brightness.

author: Emrys
author_rank: Newbie
timestamp: June 24, 2023, 09:22:17 pm
content: Hi Michal,I don't think that setup would do what you're expecting. It's likely that reducing the current supply to the inverter will just cause it to stop working - but maybe if it was made cheaply enough, the output might scale with the input voltage (probably not).The cheapest / easiest way to change AC voltage is to use a transformer, but that's a fixed solution.You can use a VARIAC (basically a variable transformer) if you only want to vary the voltage and not the frequency.It's possible to turn DC into AC, but it will require a significant amount of design + control & some pretty beefy power transistors / heat sinks (depending on the power you want to deliver). Basically you adjust the DC power to the level you want, then use an H bridge circuit to switch it on and off to your output. Just putting out a square wave will work ok in some applications, but you can improve that by adding dead time between the positive and negative states to make your signal look more sinusoidal.I put together a quick simulation to show the basics, but you can probably find a ton of info online if you really want to go down the road of making your own AC supply.

author: Michal Mytnik
author_rank: Newbie
timestamp: July 01, 2023, 09:40:19 pm
content: Thanks guys, was just curies, but guess you are right.

author: Terry Bites
author_rank: Super Contributor
timestamp: July 02, 2023, 07:59:33 pm
content: That dimmer's been workin' for me bro.
Programmable boost converter - Page 1
Forum section: electronics / beginners

author: tridentsx
author_rank: Regular Contributor
timestamp: November 22, 2015, 09:01:37 am
content: I am trying to find a dc/dc boost converter that takes 5V IN and supplies 5V to 25 V. The converter should have an MCU serial interface I2C/SPI etc ... where the output voltage is programmable and the IC provides a constant voltage at a current draw up to 50 ma. Wouldn't mind if the current draw was monitored with programmable shutoff and readout available via the serial interface. The current monitoring is not .a must but would be good to haveIs there anything like that out there ?
Programmable electronic load device - Page 1
Forum section: electronics / beginners

author: Jane
author_rank: Frequent Contributor
timestamp: July 27, 2023, 01:19:18 pm
content: During my hobby repairs, sometimes,a programmable electronic load device could come in handy.Can you advise how to choose a budget programmable electronic load device? What to be the most aware of ?

author: Grandchuck
author_rank: Super Contributor
timestamp: July 27, 2023, 05:33:29 pm
content: How much do you want to spend? There are several threads in the Test Equipment forum. On a modest budget, some like the DL24P and its variants.
Programmable Logic Array (With enable change & Clock Pulse) - Page 1
Forum section: electronics / beginners

author: johnnyblaz
author_rank: Newbie
timestamp: December 27, 2015, 12:52:44 pm
content: Hello Everyone!!As far as I know Programmable Logic Arrays (PLAs) are used for implementing combinational circuits & combinational circuits do not operate on clock pulse.Given the homework problem statement I don't understand how to design a pla that makes connections according to the value of S . I'm a complete newbie on this topic. Please explain the problem statement and suggest a method to implement the problem. Any kind of help would be greatly appreciated. Thanks!!For those who don't want to download the pdf:Programmable PLAProblemSpending a lot of time with a 3 input, 3 product term and 2 output PLA,the designers finally found that there ever changing design needs a dynamicallyprogrammable PLA, such that the connections can be turned on and off by inputsto the circuit. A 3x3x2 PLA has 26 connections that can be turned on or off. Soapart from the normal A, B, C inputs and F1 & F2 output, it has 7 additional inputsE, S & N0…N4. When E (enable) is high, the connection numbered N (N0…N4) isturned on or off according to the value of S. You can number the connections inanyorder. Don’t take any action if a number above 25 is available in N i.e. a wronginput.Input: Clock Pulse CP, PLA Inputs A, B, C, Enable change E, Connection numberN0…N4, Set connection SOutput:PLA Outputs F1, F2
Programmable power supply design 24V,  48W - Page 1
Forum section: electronics / beginners

author: Cobalt 60
author_rank: Newbie
timestamp: August 09, 2020, 09:42:14 am
content: I want to design a programmable Power supply. I started with a fixed 9 volt power supply, then the output is taken through a 100 k digital potentiometer, I can control the digipot by arduino hence the output from 0 to 9 volt . After few minutes my pot burn since it drawing more current then the rated one. So, I stopped at this point . Someone please help how to proceed further to design 24v power supply

author: MosherIV
author_rank: Super Contributor
timestamp: August 09, 2020, 10:23:12 am
content: HiMax points for curiosity and problem solving.Nil points for correct circuitTry looking at thishttps://www.eeweb.com/quizzes/op-amp-with-voltage-regulatorReplace the resistor and zener to the positive input of op-amp with the output from your digipot.Remove the 100\$\Omega\$ resistorUse a power transistor like the 2n3055 and make sure it is on a heat sink, it will dissipate the power ( voltage drop x Current through transisotr and your load)You will need a filter capacitor on the negative input of the op-amp to stop oscillations.Note : This is purely a Voltage Control circuit, ie there is NO current limit control. Over current (eg short circuit) may destroy the transistor.

author: ledtester
author_rank: Super Contributor
timestamp: August 09, 2020, 11:28:49 am
content: You can use a LM317 with a pass transistor:https://www.pcbway.com/blog/technology/LM317_Current_Boosting_Secrets.htmlor look on page 17 of the TI LM317 datasheet:https://www.ti.com/lit/ds/symlink/lm317.pdfIf you haven't used the LM317 before it might be a good idea to first build a vanilla LM317 power supply without the pass transistor to familiarize yourself with the circuit:https://www.eleccircuit.com/lm317-voltage-regulators/

author: MosherIV
author_rank: Super Contributor
timestamp: August 09, 2020, 12:38:48 pm
content: I did consider the lm317.However the OP wants to able to control digitally with microcontroller.It is possible to do it with lm317 but the circuit is actually more complicated than just building voltage regulator from scratch with opamp. (You have to use opamp to sense output and control voltage at pin1 of lm317 - circuit is harder for beginner to understand)With simple opamp voltage regulator, it is easy to set the output voltage, just by presenting the wanted voltage to the positive input of the opamp.

author: ledtester
author_rank: Super Contributor
timestamp: August 09, 2020, 02:12:36 pm
content: Quote from: MosherIV on August 09, 2020, 12:38:48 pmAh - I missed that.Here are some other forum posts:https://www.eevblog.com/forum/projects/lm317-digital-control/https://www.edn.com/control-an-lm317t-with-a-pwm-signal/https://www.electro-tech-online.com/threads/digital-control-voltage-using-lm317.96957/#post-783822Apparent successful use of a digital pot with a LM317:https://www.instructables.com/id/Arduino-Controlled-Power-Supply-Source/
Program/App to know how much curent is my phone sucking from my PC - Page 1
Forum section: electronics / beginners

author: bender120
author_rank: Newbie
timestamp: October 31, 2022, 05:00:37 pm
content: Hi guys, I often charge my phone from my PC using the USB-Port, so I wanted to know if there is a program or app for Android to know how much current is the phone sucking from the PC?I know that usb mutieters does the same, but I wanted to save some $$

author: Terry Bites
author_rank: Super Contributor
timestamp: October 31, 2022, 05:14:50 pm
content: https://play.google.com/store/apps/details?id=com.waterdaaan.chargemonitor&hl=en_GB&gl=USFree!!BTW phones just suck... you cant see the world through a drinking straw.

author: JustMeHere
author_rank: Frequent Contributor
timestamp: October 31, 2022, 05:17:57 pm
content: Google around for a "charge doctor"

author: MrAl
author_rank: Super Contributor
timestamp: November 01, 2022, 12:52:47 am
content: Quote from: bender120 on October 31, 2022, 05:00:37 pmYou can get a USB inline meter with nice display from Amazon for under $10 USD.I use that for my phone.It shows Amps, Volts, Watts, AmpereHours, WattHours, Resistance of the item being charged or powered.I think i got 2 for $10 on Amazon.Plug the thing into the wall wart, plug the phone into that. If you use a wireless charger, plug the thing into the wall wart, plug the wireless charger into it.Works with all charge modes up to i think 12v but they may have even better ones now.

author: bender120
author_rank: Newbie
timestamp: November 01, 2022, 05:00:47 pm
content: Do you have the link, I need one with usb A and C output

author: BILLPOD
author_rank: Frequent Contributor
timestamp: November 01, 2022, 06:29:28 pm
content: I like this one:https://www.amazon.com/MakerHawk-3-7-30V-Voltage-Multimeter-Voltmeter/dp/B07FMQZVW2/ref=asc_df_B07FMQZVW2/?tag=hyprod-20&linkCode=df0&hvadid=242041198988&hvpos=&hvnetw=g&hvrand=13884892466088568055&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9005066&hvtargid=pla-527423472436&psc=1

author: MrAl
author_rank: Super Contributor
timestamp: November 01, 2022, 07:38:48 pm
content: Quote from: bender120 on November 01, 2022, 05:00:47 pmYes they do and very easy to find just go to Amazon and type in "USB meter".If you get an A type only, you can get an A to C adapter then use it for A or C.The ones with the C connector may be a little more expensive.I typed in "USB meter" and got a lot of hits, and this was one of them (both A and C):https://www.amazon.com/Eversame-Multimeter-Voltmeter-Indicator-DC3-6-30V/dp/B07JYVPLLJ/ref=sr_1_3_sspa?crid=3L5UUIU29AJ08&keywords=USB+meter&qid=1667331464&qu=eyJxc2MiOiI0Ljg1IiwicXNhIjoiNC44NSIsInFzcCI6IjQuNDgifQ%3D%3D&sprefix=usb+meter%2Caps%2C89&sr=8-3-spons&psc=1

author: DavidAlfa
author_rank: Super Contributor
timestamp: November 01, 2022, 09:48:43 pm
content: Ampere does the job pretty good, also in Play Store.Anyways, it always depends on the phone, those apps only read the information reported by the system.
Programmatically switch betwean ground/Vcc/signal for input port - Page 1
Forum section: electronics / beginners

author: gcardinal
author_rank: Unknown
timestamp: March 10, 2016, 12:55:07 pm
content: I have this idea on creating a Atmel-based board with PS/2 (6 input lines) connector for testing of old keyboards.So I'm looking for a way to assign 5V, ground or signal to each pin of the connector after board has been manufactured. All 3 lines do exist - also I have 6 extra digital pins to control all this - but I'm not sure what is the best solution here.My original idea was to have logic gate and then set of 3 NPN for each connector line - but that sounds a bit too complicated - since it will be 6 logic gate arrays + 3 x 6 NPN'sIs there a more "basic" way to do this?.. Vcc = +4.5V to +5.5V and Max Current = 0.3 A.Any feedback is greatly appreciated!

author: danadak
author_rank: Super Contributor
timestamp: March 10, 2016, 03:12:41 pm
content: This is a fairly easy job for a Cypress PSOC as it has the abilityto route on chip and handle both analog and digital signals.I assume you have to supply power to keyboard, and that is justa few mA, easy for a UP to supply from a digital pin. If keyboardalso has LEDs then power will be too much and have to be handledwith external MOSFET high side switch. Or possibly use multiplepins paralled to supply power, check specs both keyboard andthe processor you use to control all this.So what you have remaining are just normal digital I/O to mux, usemux/demux logic parts for that.Regards, Dana.
Programming Atmega 328pb using Arduino IDE (Arduino as ISP) - Page 1
Forum section: electronics / beginners

author: TechJunkie97
author_rank: Contributor
timestamp: June 02, 2019, 08:55:04 pm
content: Hi, I made my first PCB using Atmega 328pb micro controller. I have an ICSP header on the board for programming. I successfully burnt the bootloader using the OptiLoader (https://github.com/WestfW/OptiLoader) using an Arduino UNO board. However, I can't seem to program the microcontroller. I am trying to program the microcontroller using "Arduino as ISP". I took the following steps in the Arduino IDE.1) Uploaded the Optiloader Sketch to Arduino UNO board.2) Connected the ICSP header as described in the OptiLoader Sketch and opened Serial Monitor.The bootloader was burnt successfully to the microcontroller.3) Uploaded the Arduino ISP sketch using "AVRISP MkII" programmer option to the Arduino Uno Board.4) Uploaded a test sketch (turning a pin HIGH/LOW every 500 ms) to the microcontroller using "Arduino as ISP". I chose the board as the "Arduino /Genuino Uno" in the "Tools" menu in the Arduino IDE.The sketch got uploaded to the Arduino Uno board instead of the microcontroller. I don't know what I am doing wrong. Does anyone have any suggestions for this problem? I only have ICSP header available for programming.Thanks!

author: Wigo
author_rank: Contributor
timestamp: June 02, 2019, 09:51:54 pm
content: You are on the right track. But there is one small detail every turorial is missing. Insetead of uploading the sketch via the arrow or the upload button, you have to choose the upload via programmer option. It is in the tab left to the tools options if i recall it correctly.Oh and you can burn the bootloader via the arduino ide as well. As long as you have not to set other fuses.

author: TechJunkie97
author_rank: Contributor
timestamp: June 02, 2019, 10:16:15 pm
content: Thanks Wigo. You were totally correct about the upload via the programmer. It is in the "Sketch" drop-down menu. One more thing is that the Atmega328pb microcontroller is not supported natively in the Arduino IDE. I had to download 3rd party boards to make it work (https://github.com/watterott/ATmega328PB-Testing/find/master).

author: tooki
author_rank: Super Contributor
timestamp: June 04, 2019, 12:27:13 am
content: You can modify the Arduino IDE preferences in a text editor to default to upload using the programmer, if that’s your primary method.
Programming for a  HT68FB560 mcu? - Page 1
Forum section: electronics / beginners

author: shitfstacker
author_rank: Newbie
timestamp: August 24, 2016, 06:03:36 pm
content: Hi!I can code software in c, c++ java and python but I've never tried to program something "material" andI'm completely lost here. I've got a board with a "HT68FB560" mcu but I don't really know where to start so........ I came here to ask you where should i begin from?

author: MosherIV
author_rank: Super Contributor
timestamp: August 24, 2016, 07:10:21 pm
content: QuoteDo your home work, have you searched for info on the mcu (data sheet)?Is the board a demo/development board?Does the board have a programming or debug interface?The mcu sounds like a 68000 derivative, is that correct?If so, there should be freely available compilers linker and debug tools.You will need the memory map for the board to be able to access/control the peripherals.Search for any free drivers (source code) for the mcu/peripherals even if they are the wrong os, yiu can port them.
Programming Help for EPROM Chip - Page 1
Forum section: electronics / beginners

author: onyx
author_rank: Newbie
timestamp: February 05, 2018, 06:25:02 pm
content: Hello EEVblog,I have this EPROM chip (M27C2001-12C1 Datasheet) along with thisprogrammerI purchased from eBay; I haven't had any success in getting the FlashCat USB software to recognize my chip. I believe the problem is that the FlashCat only supports up to 5V and the programming voltage of my chip is 12V. Does anyone know of a USB programmer and software that is compatible with my chip. I appreciate any kind of information/help I can get.Thanks!

author: Cliff Matthews
author_rank: Unknown
timestamp: February 05, 2018, 06:44:19 pm
content: I didn't see that 27c device listed on the supported device list.. mfg says it's open to questions about other devices..http://www.embeddedcomputers.net/contact/

author: onyx
author_rank: Newbie
timestamp: February 05, 2018, 06:47:54 pm
content: I will probably return the programmer I ordered as it only supports up to 5V and the programming voltage of my chip is over 12V. Although I have emailed the mfg of the programmer for more help.

author: Cliff Matthews
author_rank: Unknown
timestamp: February 05, 2018, 06:51:27 pm
content: Ask them and maybe they support some off-board charge pump to give you the gated 12.25v. Can't hurt.

author: onyx
author_rank: Newbie
timestamp: February 05, 2018, 10:34:22 pm
content: Got a reply back and they did not have a 12V programmer, they did refer me to a compatible chip but that was 5V. My main board supplies 12V so changing the chip wouldn't work.

author: Sarcarean
author_rank: Contributor
timestamp: July 24, 2018, 02:51:56 am
content: Quote from: onyx on February 05, 2018, 10:34:22 pmEmbeddedComputers's DIP32, PLCC32 and SO44 adapters all have "12V" switches to enable a ST662AC (5V to 12V charge pump) in order to program 12V EPROM devices. The M27C2001 is supported, but not automatically detected. You need to go to the settings window, the last option to select it from the OTP EPROM (series 27) devices. Then set the Mode to EPROM. Now you can read the device and program it as needed.
Programming MAX3949 Laser Driver IC (Solved) - Page 1
Forum section: electronics / beginners

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 06, 2020, 07:46:53 pm
content: i've setup everything, give pulses to it, set the TX_EN to 1 means transmitter active. TXSTAT returns 0 means everything is fine, but i got no output to the 50 ohm load other than 50mVpp pulses, useless! what else to do? can someone help me on this?ps: i read the Design Procedure but dont fully understand it. there are IMODMAX, SET_IMOD, MODINC and BIAS etc i'm not sure how they are implemented, and what unit is in the explanation. they are not explained in detail or as an example in practice. still reading it letter by letter, its like having brainfart moment. fyi i try to make another fast pulser using it.got it! its all in those mentioned registers.. try and error is the key...request 240418: someone asked for the source code, here it is attached (the rule is, dont edit the header on each file, cheers).
Programming PIC16F676 with TL866II Plus - Page 1
Forum section: electronics / beginners

author: hyuma
author_rank: Newbie
timestamp: September 03, 2020, 10:29:34 pm
content: Hi guys, I'm new here, i'm trying to do switchless mod on my sega genesis and I have to program the pic16f676 with the .hex code. As I don't have the pickit3 i'm using the TL866II plus. The programming is successful but when i solder the chip on the board it doesn't work. I've add 2 files, the .c code and the compiled .hex file. Anyone could tell me if this .hex could be flashed with minipro? I have latest version xpro 10.15 software, but a friend told me that had same issue and seems there are some "initializations" problem with tl866II plus. I really need your help, thanks a lot!
Programming remote receiver - Page 1
Forum section: electronics / beginners

author: kcs
author_rank: Regular Contributor
timestamp: September 06, 2015, 09:37:23 pm
content: A sh*tty remote receiver (image attached; it has the following markings: TY-RS-L011, v1.2) has stopped working. It was possible to toggle relay with a remote control, but it is no longer the case. It is now turning relay ON once power is applied and I can no longer control it. If I press a small button on the receiver it turns into another mode (I guess learning mode) and I can see how LED reacts to pushes of a button on a remote control. So, that tells me it still can correctly decode push button events, but it is no longer able to control a relay. I would like to know if I can somehow reprogram it so that it works correctly (I am hoping to find some magic button pressing sequence that allows to program it). Is there any information available about this receiver on the internet?Yes, it would be much easier to order another one, but I don't want to wait for one month.

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 06, 2015, 10:06:46 pm
content: Could be that the part (BJT, FET) that controls the relay has failed and is now shorted, that would explain the relay activating at power on and not being able to control it with the remote.

author: SL4P
author_rank: Super Contributor
timestamp: September 07, 2015, 02:20:39 am
content: Either the output driver is shorted as suggested above, or the receiver has forgotten the transmitter (less likely unless you held the rx button as below!)Typical operation:The LED flash when you press a Tx button is simply saying it received a key, but other than 'opening' the relay, there is usually no other indications for a successful key press.CAREFUL. If you hold the receiver button down for an extended period, it's will 'erase' all known Tx keys...!Learning is usually - press the Rs button once quickly (sometimes a 'learn' LED will light up, then press a Tx key within 5-10 secs to memorise the key.

author: kcs
author_rank: Regular Contributor
timestamp: September 07, 2015, 02:21:49 am
content: PA0PBZ, thanks! You was right. S8050 (NPN) has failed. As I didn't have any suitable transistor to replace it, I have used BS270 (n-FET). Seems to be working fine.SL4P, I see. I will try to program another remote control using your suggested method.
programming Rigol dg1022 - Page 1
Forum section: electronics / beginners

author: Marissa
author_rank: Newbie
timestamp: September 16, 2014, 08:49:07 pm
content: Good day!I was wondering if any of you had already used a waveform generator Rigol in a programming form. I have a Rigol dg1022 and I'm trying to control it using labview. I want to create a burst but not with a defined period. I want to activate the trigger manually but I cannot find the instruction for this action.The step secuence that I'm using is:FREQ 9VOLT 2BURS:STAT ONBURS:NCYC 1BURS:MODE TRIGTRIG:SOUR BUSOUTP ONBut I do not know how can i write the next step...Using a agilent 33220A generator we can write just TRIG to generate the signal but this does not work with Rigol.Thanks in advance.

author: AlessandroAU
author_rank: Regular Contributor
timestamp: September 28, 2014, 05:29:27 pm
content: In labview go to help and select find instrument drivers, download the package for the 1022u the example VI's show how to do everything
Programming Xilinx XC1765ELSO8C PROM with TL866II - Page 1
Forum section: electronics / beginners

author: siliconbrush
author_rank: Newbie
timestamp: November 28, 2020, 04:18:04 pm
content: Hi,Can anyone tell me if it's possible to program a XC1765ELSO8C PROM with a TL866II programmer? If not, can anyone recommend a cheap programmer that does support this PROM type. I'm doing a project where I need to program this PROM.XC1765ELSO8C datasheet:http://www.xilinx.com/support/documentation/data_sheets/ds027.pdfI do know that the Roman Jones programmer supports it, but it's a bit expensive and not easily available it seems.http://www.roman-jones.com/SPROMProgrammer.htmThanks in advance.

author: jmelson
author_rank: Super Contributor
timestamp: November 28, 2020, 05:39:13 pm
content: Quote from: siliconbrush on November 28, 2020, 04:18:04 pmYou might be able to replace this with an SST 25VF010 or similar serial EPROM, although it might take a change to the program select jumpers on the FPGA. I've also used the Atmel AT17LV256 reprogrammable EPROM for some older FPGA boards. All of these are way cheaper than Xilinx, and reprogammable. These other parts may point you toward other programmer units that will work.I've used the Xeltek Superpro to program some of these parts.JonJon

author: siliconbrush
author_rank: Newbie
timestamp: November 28, 2020, 07:05:50 pm
content: Thanks man. It would be great if I could use such a EPROM instead. This project was done by someone else years ago and I'm trying to replicate it.Project entails upgrading a BGA304 CPU from 300Mhz one to an 600Mhz, which I hope to do by someone more experienced.After this the old PROM needs to be removed and replaced with the new one which has the correct setup data for the new CPU. The PROM file is available as a .mcs file, which I assume can be used in an Atmel AT17LV256 EPROM?It's been 15 years or so since I've programmed EPROMs in college (and then only for a bit), so I'll need to refresh my memory.Project details:http://www.sgidepot.co.uk/o2cpumod.htmlThis project is definitely out of my depth, but as I don't have anything better to do, I might as well try it ¯\_(ツ)_/¯.EDIT: I checked farnell and mouser for similar chips. The Atmel AT17LV256 seems to be very similar to the Xilinx PROM with same pinout. So it's probably my best bet. I just have to find a programmer for it.

author: siliconbrush
author_rank: Newbie
timestamp: December 04, 2020, 01:03:21 pm
content: I got the AT17LV256 EEPROM. I'm trying to program it without success so far. Can anyone confirm the blue arrow is pointing to PIN 1 of the EEPROM. Thanks.

author: psxpetey1
author_rank: Regular Contributor
timestamp: January 28, 2022, 05:27:26 pm
content: why didnt you use the xilinx original?
PROJECT - Page 1
Forum section: electronics / beginners

author: Balaji
author_rank: Newbie
timestamp: February 23, 2017, 05:27:29 am
content: We need to convert load cell output (millivolt) to (4-20)milliamps, to give input to the PLC. Is there any IC Or circuit diagram to directly convert millivolt to milliamps?

author: Refrigerator
author_rank: Super Contributor
timestamp: February 23, 2017, 05:30:22 am
content: I believe what you're referring to is a resistor.

author: bharatcs
author_rank: Contributor
timestamp: February 23, 2017, 05:47:03 am
content: You mean a voltage controlled current source

author: rstofer
author_rank: Super Contributor
timestamp: February 24, 2017, 06:25:07 pm
content: Why not use a manufactured item like:http://www.omega.com/pptst/DRF-LC.htmlThere are many other converters, I just happened to look at Omega.
Project Box Creation - Page 1
Forum section: electronics / beginners

author: ChrisGreece52
author_rank: Frequent Contributor
timestamp: January 31, 2013, 07:36:20 pm
content: Now that i have completed my Lm386 project (Thanks to all the guys that helped me troubleshoot my board) i need to host it somewhere....and i do not know where.So i would like you to suggest me please1 ) what program should i use to design my box and the components that will be in it?2 ) what material should i use to make my box so it can be easily modified and crafted3 ) shall i buy ready hobby boxes from ebay or taydaelectronics??Thank you looking forward to your answers.PS (i have no fancy tools like a hacksaw i don't even have a dremel but i have a quite big wheel grinder which i can use.) so i would appreciate if you suggested me simple materials.Thank you.

author: kizzap
author_rank: Unknown
timestamp: February 01, 2013, 12:31:38 pm
content: TBH, you are probably better off designing your circuit to fit a ready made enclosure of some form that you like...saves time and tooling issues.and at a minimum, you will probably need a drill of some kind...

author: ChrisGreece52
author_rank: Frequent Contributor
timestamp: February 01, 2013, 10:57:36 pm
content: Thank you i will find one.
Project case and size - Page 1
Forum section: electronics / beginners

author: TorqueRanger
author_rank: Frequent Contributor
timestamp: January 01, 2016, 06:01:44 am
content: I was looking around for project case and ideas to current projects ..I found Ian over at Dangerous Prototypes and he had a pretty cool idea for case and size patterns which I might try including in Diptrace . So what kind do you guys use for case or pcb size standards for building
Project enclosure/perfboard combination recommendations - Page 1
Forum section: electronics / beginners

author: JuiceKing
author_rank: Regular Contributor
timestamp: July 31, 2012, 09:47:51 pm
content: Do you have any favorite lines of enclosures that take various standard-sized perfboards and/or Arduinos?I've got ideas for projects, but I find that when I build something on a piece of perfboard, I wish I had first through through all the implications for the enclosure, it's controls, displays, jacks, etc. On-line, the selection is too vast. I get stuck trying to figure out which enclosures are available on-line that would have mounting holes in the right places and enough space for batteries and all the rest. I probably should have started my design with the box, but it's too late after I build the circuit.There must be some good approaches to this out there... What do you like to use for small projects (smaller than a cigar box)?Thanks!- Ken

author: JuiceKing
author_rank: Regular Contributor
timestamp: August 02, 2012, 02:01:24 pm
content: Quote from: Electroalek on August 02, 2012, 01:29:25 pmGood leads. Thank you!For posterity, here's another that looks promising:http://www.circuitspecialists.com/- Ken
NFC project inspiration please? - Page 1
Forum section: electronics / beginners

author: theperson333
author_rank: Newbie
timestamp: October 20, 2015, 04:13:02 pm
content: Hi,I am doing A-level computing (United Kingdom), and the coursework element, quite naturally, requires you to program a solution. This can include programming a microcontroller or other embedded platforms. I'm quite interested in using NFC in my project. Has anyone got any basic ideas that I can build into a project? I've only used arduino to date, but I'm willing to learn. I'm a lot more fluent in VB.net, so ideas that also include some kind of desktop element would be goodP.S. Ideas do not need to include NFC, I just find it interesting, so would prefer an NFC incorporating project.P.P.S. Not sure if this would be suitable for the projects forums, so I put it here.Thanks.

author: Fred27
author_rank: Unknown
timestamp: October 20, 2015, 05:42:47 pm
content: My latest NFC project was using my NFC implant to unlock my PC. The microcontroller emulated a keyboard and just typed Crtl-Alt-Del and the password. I used an MSP430 but you could do this with any microcontroller that can manage USB HID.0xfred.wordpress.com/2015/01/14/nfc-login-version-1-0/If you like coding in VB.net there's always a raspberry pi running windows 10 IoT. It's still a little rough round the edges and feels like a beta, but has promise and might suit you.http://ms-iot.github.io/content/en-US/GetStarted.htm

author: Wilksey
author_rank: Super Contributor
timestamp: October 20, 2015, 07:53:06 pm
content: You could use NFC as a login to a system, or as a security override type of thing perhaps?

author: Maxlor
author_rank: Frequent Contributor
timestamp: October 20, 2015, 10:17:55 pm
content: A couple of things I used NFC for in the past, maybe it'll be of some inspiration:- Per-unit calibration data for a product where we couldn't add a direct electrical connections without having to jump through tons of regulatory hoops.- My business card. For phones that support it, it's a lot quicker than a QR code, which is the fallback.- Distributing WiFi info. Again, fallback is manual entry.- Inventory tracking.- (merely as a user:) Hong Kong's octopus card.I wouldn't recommend using it for authentication-related things. The ID and storage-based mechanisms aren't secure. There are crypto-capable chips available though.