Close
0%
0%

Microcontroller based curve tracer

Electronic Curve tracer for measure and compare components on circuit boards

Similar projects worth following
This project was based on the Huntron Trackers. I could not afford to buy one, so I developed my own ones and built them.

What is it good for?

It is good for compare a working and a not working circuit board, without you have to apply any power to it. A curve tracer show Voltage - Current characteristic of any electric component, like diodes, capacitors, CMOS ICs and many more, which you want to look.

This equipment mostly used in repair purposes

I created two version of the tracker, called Version 1 and Version 2. Recently I am working on a new version (Version 3). Below this lets see how each version works.

Version 1

I started develop this version about a year ago, when I saw a Huntron tracker at my work and I thought it is not too difficult electronic, but so overprice at the same time.

The Version 1 has just one voltage and one frequency range, so it is a very basic model. The basic idea behind a curve tracer a simple circuit, which input is a sine wave and has some resistor in it. We need a current limit resistor and a current sense resistor.

The other big part is a dual channel oscilloscope with X-Y mode, or like my version I used a cheap arduino pro mini and a display, it is more then enough for a basic operation. I added a function, with the tracker can save a curve on the display and can measure an other component at the same time, so with that you can compare a good component with a bad component.

Tracker Version 1

The schematic is a updated version, with some compensation, and modification on it, I could reduce the short circuit difference, so the line is almost vertical on the screen, when the two probe is shorted.

The upper op-amp is the voltage sense (X axis on the screen), the lower op-amp is sensing the current, which is flowing through the measured component (Y axis on the screen).

Some picture about the Version 1

Tracker Version 1

Tracker Version 1

It is not too pretty, but it works well, for a beginner I recommend to start with this, because it is cheap, and after easier to improve.

A short slow mo video how it is works.

I am planning to add some feature to this version, so it more capable of repair works.

Version 2

The second version is basically a much closer producte what I really wanted to create, it is based on the Version 1, but I learned a lot from my mistakes. I wanted a multi range and pc compatible version with the stand alone usability without pc, so most of the time I can use it like a independent device, but if I have to I can save the curves to the pc as well. The development was long, it took me more than half a year, and a lot of money as well. I think it is worth all the time I put in it.

Lets start show what I am talking about.

Tracker Version 2It has 25 voltage range, 5 resistance and 6 frequancy range. The screen is a 4" mcufriends tft touch screen, but in this operation I did not put any function on the touch screen. The Version 2 has two channel, it is more easier to compare curves at the same time.

The buttons light up when the actual function selected.

This device is much more complicated then the first version was, so I do not recommand a beginner to try to build this. I am planning on making a kit about every version, so it will still stay cheap and I can give a little bit of fun to build these.

The Version development is still on progress, so I did not have a propper schematic, but it will be released soon, as well as the code.

More info about this version you can find below at the log section.

Version 3

I started developing a new version at a couple weeks ago, which will be similar to the Tektronix TR210. It is basically the Version 2 without the screen and any pc connection option. For this version you need a dual channel oscilloscope, but I think it is not a problem for that who is looking these types of instruments. I would like to make this open source, like the Version 1 so if anybody want to help developing this version, please contact me.

Version 3 will have at least 25 voltage range, 5 resistance and minimum 5 frequancy range, and ass well two channel measuring input, with...

Read more »

SCH-MeasureAmp R0001.pdf

V4 Measurement amplifier schematic

Adobe Portable Document Format - 96.47 kB - 08/10/2018 at 12:30

Preview
Download

SCH-Attenuator R0002.pdf

V4 Power attenuator schematic

Adobe Portable Document Format - 144.05 kB - 08/10/2018 at 12:30

Preview
Download

SCH-PowerAmp R0003.pdf

V4 Power Amplifier schematic

Adobe Portable Document Format - 73.91 kB - 08/10/2018 at 12:30

Preview
Download

SCH-PSU R0003.pdf

V4 Power Supply schematic

Adobe Portable Document Format - 80.18 kB - 08/10/2018 at 12:30

Preview
Download

Block Diagram V4 R002.pdf

Block Diagram for the upcoming V4 version

Adobe Portable Document Format - 210.48 kB - 07/29/2018 at 15:29

Preview
Download

View all 13 files

  • Analog circuits

    SUF08/10/2018 at 13:25 0 comments

    I'm heavily working on the next version of the curve tracer. Today I almost finished the schematics of analog modules of the device. All of drawings are uploaded into the files section. Actually everything reside in a private repo on the GitLab. This will be publicly opened when I order the first revision PCBs. Until this time the whole circuit is so shaky that I don't want anyone to build it, because the design will probably heavily changed and there are incompatibilities exists between the schematic an PCB designs.

    About the circuitts

    Power supply module:

    The power supply use a enclosure mounted toroid transformer with two 14V secondary windings (probably a 100VA model). The circuit itself provide +-15V from linear regulators mainly for the analog circuits and the power amplifier, a +5V and +3.3V from buck converters for the logic circuits (plus MCU, Display, etc.). And a four channel buffered rail splitter (virtual ground) used for the level conversion of the ADC and DAC (probably two will be used, but it is easy to build four from a 4 channel opamp)

    Power Amplifier module:

    It converts the 0.65V-2.65V swing sine wave from the MCUs DAC module to +-10V (20Vpp) gound referenced load capable signal.

    In the input I put a unity gain differential amplifier. This will convert the input to -+1V by substracting the 1.65V reference DC from the power supply.

    The next stage is a 1.28x gain non-inverting amplifier creating 2.56Vpp signal. This signal attenuated by a 256 step digipot. This give us 10mV step control of the power amplifier. The power amp has a 10x gain. So the result: we can control the output voltage of the amp 0-20V in 100mV steps.

    Attenuator module:

    This module control the current limiting resistors on the output of the Power Amplifier. As requirement we can't use conventional mechanical relays mostly because of the noise it makes. Therefore I choose three different kind of solutions to set the current limiting resistor value (we need AC capable devices):

    1. Low current version: ADG451 (or ADG441) and ADG1411 analog switches (capable around 100mA)

    2. Medium current version: Vishay VO14642 photovoltaic AC MOSFET SSR (capable 1A AC)

    3. Load switching: Si8751 isolated MOSFET drivers + dual MOSFETs (capable 4.5A AC)

    Also this circuit provide the TVS protected output for the DUT and the measurement point for the output current and voltage. The output current measured across the whole resistor network and not on an additional current sense resistor. This solution probably generate less noise, but on the other side more sensitive to the temperature drift of the resistor (we will see, how this works in practice)

    Measurement Amplifier:

    This is a two channel amplifier one for the current, and one for the voltage. The input signals are buffered with two unity gain amplifiers. The voltage signal is coming from the voltage across the DUT and amplified by a "PGA" capable of creating x0.1, x1, x10, x100 and x1000 gain respectively. The current signal is comming from the voltage across the current limiting resistor. As this is not ground referenced I used a differential amplifier configuration with x0.1, x1 and x10 gain.

    The outputs of this circuit can be directly connected to the oscilloscope X and Y inputs and will be also connected to the MCUs 12bit ADC through a level shifter (not implemented on this board) 

    This is all for now. More to come.

    If you have any question, suggestion on this design, please let me know in the comments

  • MCU Selection

    SUF07/31/2018 at 19:03 0 comments

    As I mentioned earlier I wanted to change the two AVR MCUs from the original design to a single 32bit one.

    Here are my selection criteria:

    • Two at least 12bit DAC channel - One channel is used for the sine wave generation, the second maybe used for the pulse generation (not designed, decided yet, but better if it is available)
    • Two at least 12bit ADC channel - For measuring current and voltage on the DUT. If parallel sampling and/or differential input available is good but not requirement
    • DMA for DAC operation
    • 32 bit core - ARM Cortex-Mx prefered
    • Arduino framework support, free, native C/C++ IDE support (I haven't decided between the two, so the support is necessary)
    • Low cost development board
    • Easily solderable (for me. Means: TQFP accepted, QFN, BGA not - I know this is my personal limitation, but I don't want to learn it right now)

    Based on the specs above my choice is an STM32F303RET6:

    https://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-mainstream-mcus/stm32f3-series/stm32f303/stm32f303re.html

    And the development board for it:

    https://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-eval-tools/stm32-mcu-eval-tools/stm32-mcu-nucleo/nucleo-f303re.html

    I ordered the board from Farnell yesterday. Today arrived:

    Next: seting up the development environment

  • V4 Anouncement, new member

    SUF07/29/2018 at 15:34 0 comments

      Hi Everyone,

      My name is Zoltan Gomori (SUF). I recently joined the project to speed up the development.

      I started to develop the new V4 version of our curve tracer. Here is what you can expect:

      Now, I'd like to summarize a few design concept for the project.

      I started to work from the 3rd version. As I see now, It can be called as the 4th version because it will have so much differences.

      1. Modular design. I want to be able to use the design either with internal display or with an oscilloscope
      2. Use one 32 bit MCU instead of the current two 8 bit AVR (most probably an STM32)
      3. Internal power supply
      4. Based on the Huntron Tracker 3200S specification - except the 128bit scanning interface
      5. Complettely elliminate mechanical relays (even the reed ones)
      6. Get rid of the most of the digital potentiometers - not really fits for the needs, using resistors and analog MOSFET switches instead
      7. Get rid of the discrete R-2R DAC using an MCU integrated instead
      8. Utilize MCU integrated ADC/DAC/DMA as much as I can
      9. Get rid of the trimpots as I can (probably need to keep it for some offset setting functions)
      10. Keeping the error of the equipment around 1% every place (it is not a high precision equipment. If we want to decrease the error significantly, it cause significant rise in the costs)
      11. Adding the pulse generator as an optional module. It was missing from the 3rd version
      12. Adding the lower current limiting resistor ranges (down to 10 ohms)

      First of all, I made a block diagram of the equipment:

  • Files for Trackers

    Máté Tóth04/08/2018 at 19:08 0 comments

    Dear all,

    I uploaded all of the latest drawings and ino (arduino) files for all 3 version.

    You can find in the "File" section, and you can download those.

  • Version 3 is done!

    Máté Tóth03/18/2018 at 17:07 1 comment

    I finnished the Version 3 prototype, every function is working now. I found tested some future development on it, and I managed to connect it to the PC, so will be also capable of saving curves onto an excel sheat. I need some time and I will finnish the configuration on this also.

    Here is a video about every function:

    Some picture:

    Curve Tracer Version 3
    Curve Tracer Version 3
    Curve Tracer Version 3
    Curve Tracer Version 3
    Curve Tracer Version 3
    Curve Tracer Version 3
    Curve Tracer Version 3
    Curve Tarcer Version 3
    Curve Tracer Version 3

    I am quite happy about the prototype, I think it is better then what I expected when I started. Now I have the final circuit so I am looking forfard to designing my own pcb for it. 

    It still missing the power plug at the end, but I will place it.

  • Version 3 #2

    Máté Tóth03/15/2018 at 17:39 0 comments

    Hi everyone,

    I did some progress on the Version 3 prototype, it has more working function then before. I am still facing with some hardware butg, what I inherit from the Version 2. I found out the original circuit has big issues, because I did not had Oscilloscope when I developed the Vesion 2 I could not see these issues before. The Voltage ranges was messed up. Most of the issues I could fix, but it has still some.

    A little bit about the spec:

    • 6 Voltage range (6 Current range)
    • 6 Frequency range
    Ranges123456
    Resistance250ohm2k5k10k15k20k
    Voltage0,5V1,8V3,3V6V8V10V
    Current2mA0,9mA0,66mA0,6mA0,5mA0,5mA
    Output1mW1,6mW2,2mW3,6mW4mW5mW

    And the video:

  • Version 3 Function test

    Máté Tóth02/11/2018 at 21:23 0 comments

  • Version V3 in the final!

    Máté Tóth02/03/2018 at 21:50 0 comments

    Hi everyone,

    I know you are waiting really long time to see how is this project develops. I had a bit of time recently and I could work on the Version 3 electronic development and bulding ass well. It took me a lot of time, to start it, but I am getting ready to finish it in the next 2 week. 

    Some improvement, I managed to build it a bit smaller then what I thought and it may get smaller with time. Because it is still a prototype, I am building it on a proto board, and after if everything works I will designe a PCB for it.

    The improvement was, I managed to get more resolution on the Voltage ranges, but it is not has any big deal in Version 3, because it will be have 6 Voltage range, but if I need in theary it can be handle 255 Voltage range now if it needed. Also if I redo at Version 2 I can use the 255 voltage ranges. :D

    Also I would like to improve the frequancy ranges, which has at the moment 6 ranges.

    As I mentioned before the Version 3 specification will be:

    - 6 Frequancy range between 50Hz and 20KHz

    - 6 Resistance range between 47ohm and 25kohm

    - 6 Voltage range between 0,2V and 28V peak to peak

    Some picture :

    The improved circuit designe:

  • Version 3 prototype is on the way

    Máté Tóth07/24/2017 at 19:29 0 comments

    I started working on the nev version prototype, which will be really simmilar to the Tektronix TR210. For use you will be need an oscilloscope to display the curves.

    It will have:

    • 2 channel
    • 6 voltage ranges
    • 3/6 frequancy ranges
    • will work both 230V and 110V AC

    I still have to finish the pcb designe, and manufacture them.

  • Version 1

    Máté Tóth06/29/2017 at 17:05 0 comments

      The hardware:

      It has tree main part, which are:

      1. Display (2.4" TFT Touch display)
      2. Arduino pro mini (5V 16Mhz version)
      3. Analog stage of the curve tracer

      The display has 320x240 pixel resolution, which is perfect for this application. I only use 240x240 pixels for the curves and the other part of the screen is used to show some basic parameter, which is minimum and maximum measured voltage. These two voltage point can show you the break down points on the Zener diode for example.

      When I was developing the sketch I was optimistic to use the Arduino pro mini, but end of the project I had to realise it can not handle very well the display functions and at the same time the measure functions. I ran out very quickly of the 2K RAM, so I had to do some optimalisation. In the "final" code I am using half of the program memory and almost 90% of the RAM. On the Pro Mini I had to use almost all digital and analog pin, to make it working.

      For power the microcontroller and the display I used a small DC-DC converter, which I not recommend to do, because I figured out it makes a lot of noise. This noise has a very bad effect on the current measurment, that why I do not have a perfectli straight line on the display.

      On the picture above you can see I hacked a button on the red probe. That button has a purpose, if you push it when you measure something, the tracer can store that curve into the memory. The stored curve showed on the display as a red curve, and same time you can measure a other component, which you want to compare it.

      The software:

      Part of the code was from my other project, which was a simple arduino oscilloscope I made. I never thought I can use it for anything usefull, because of the low speed, but for this project it was perfect. I modified to handle two channel, and it worked perfectly.

      In this project I did not need any trigger function, because it does not matter where the drawing is starting. It just simple measure 240 point on each channel as fast as can do, and after those stored in two array, it start drawing the dots on the display.

      After all this project was successful for me, I learned a lot.

      A slow mo video how it works:

      Upgrade plans:

      In the future I would like to separate the display functions from the measure functions.

      I am thinking about to make a function generator for drive the analog section, and then I can change the voltage, frequency and with some other component the resistance, with I can limit the current.

View all 19 project logs

Enjoy this project?

Share

Discussions

Marek wrote 07/08/2018 at 14:58 point

Hello. 

Could you give me schematic data and a list of components like display type etc Versions 2 ? 

Well thank you.

bresto100@gmail.com

  Are you sure? yes | no

worrawit wrote 05/14/2018 at 02:13 point

Hi, Máté

I'm sorry.I'm not good English.

Thank you very much. For the document you uploaded.

What version of the board INO  do you use for the project Tracker_V2?

I use the board Arduino mega 2560.

Do not compile source code. Error  

tracker-V2_2017.04.10:157: error: 'REG_ADC_MR' was not declared in this scope

   REG_ADC_MR = (REG_ADC_MR & 0xFFF0FFFF) | 0x00020000;

   ^

tracker-V2_2017.04.10:162: error: 'DAC0' was not declared in this scope

   analogWrite(DAC0, 100 );

               ^

tracker-V2_2017.04.10:757: error: 'DAC0' was not declared in this scope

   analogWrite(DAC0, freqvalue );

               ^

Thanks! brother

  Are you sure? yes | no

Máté Tóth wrote 05/14/2018 at 04:08 point

I used Arduino Due, that why you have errors. Due has 16 bit adc an 2 Dac. 

That what the errors say.

  Are you sure? yes | no

John Rad wrote 04/06/2018 at 15:50 point

Máté:

Do you have the INO for Version 1?

If you are not sharing that, can I ask if my assumptions are correct;

- X axis is A7 input, Arduino , Voltage

- Y axis is A5 input, Arduino, Current

and I will make up some plotting code that is X vs Y  with 'previous plot' persist feature.

I will port over to Arduino Nano V3 clone which are flooding Canadian market now at $8cdn

I assume Op Amp is dual or quad, rail to rail, single +5V . LM339? Not high frequency.

I assume I could use a 9VAC transformer secondary to run a Regulator 7805 into the Ardy NanoV3 for power and isolate the Laptop USB (+5V) for safety.

What settings for the pots were useful in testing? R3(gain)&R4(offset) adjust Volt X axis ranging, so setting them for a nice amplitude ratio is obvious. R5(gain)&R6(offset?) adjust the current Y axis scaling. 

The tricky settings will be  R1(I-Limit) and R2(?I-shunt?) settings. I have 50Ohm 10turn pots but it may be that a good setting comes from display on Red-Black lead short circuit current, which I think I would like to be 1mA or lower. I have a 1982 DynaTracer

and its highest in-circuit current is 333uA or 1/3rd of my multimeter but with like 16.8VAC on my true-RMS Fluke, so like a bit high. That DT-1 adapter used the famous low profile FlatHead 115 VAC primary - 12.6 VAC dual series secondary and I have had issues with testing delicate 3.3V modern logic.

summed up:

Your V1  is a good front end for an Ardy NanoV3 with cheapo display OLED 0.96 128x64, total $15 here in Canada.

I had a Huntron1000 for 17years and  I am familiar with the characteristic failure mode waveforms on V+/- and I+/- quadrants. (the problem is that Tracer+Oscope+AC+probes is not really 'portable' IMHO).

If any of the other readers have INO to share, post them somewhere and publish that link here in this forum. Please and thanks

Wishing Well:

A 'self contained Pen' (like:logic style) Probe with small 128x64 Oled I2C 

using your V1 front end, 

and psuedo-sinewave transformer oscillator from arduino as source, 

all running from Li-Ion single cell 18650. 

the problem may be that a mini audio TXfmr may not have enough power at output (1000:8ohm oldschool style)  to make a V/I display "work"

A Huntron in a Pen with USB charging, and ground clip, for comparison sniffing.

You V1 thing, cased up V2, and the range chart in V3 (settings 2 and 6)  gave me the idea.

RadMan 

  Are you sure? yes | no

Máté Tóth wrote 04/08/2018 at 19:06 point

Hi,

You can find every documents in the download section.

  Are you sure? yes | no

eyyubkoseoglu wrote 03/20/2018 at 11:57 point

Hi Friend... thanks for information about your Project. it is a nice job. ı like it. I am an electric and electronics teacher in a high school in turkey. I want to make it your Project. Can you share me your Project details.

my email is eyyubkoseoglu@hotmail.com or eyyubkoseoglu@gmail.com

thanks for your interest

  Are you sure? yes | no

feyyaz kurt wrote 01/27/2018 at 08:42 point

Hi, sorry for my bad english. The progeny are great. please share with me from the developments and documents.

kurtfeyyaz@gmail.com

  Are you sure? yes | no

gomecatronica wrote 10/04/2017 at 02:33 point

Hello,

The project is very interesting it will be very good to link it with a database in such a way that the curves of the article have been analyzed, I can collaborate on that topic.

My email is gomecatronica@yahoo.com

Sincerely

Diego

  Are you sure? yes | no

worrawit wrote 10/02/2017 at 04:05 point

Hi, Máté
I'm sorry.I'm noot good English.
It is a beautiful project.
Could you upload arduino code curve tracer V3 files if thats ok or send to this email:worrawit2010@gmail.com Thankyou verry much.

  Are you sure? yes | no

Máté Tóth wrote 10/04/2017 at 20:57 point

Hi, worrawit

I did not write the code yet, i still have to write it, sorry.

Thanks for your interrest.

  Are you sure? yes | no

worrawit wrote 10/07/2017 at 06:29 point

Hi, Máté Tóth

Thank you for answering my question.

Can you send a source code  version 2 by email?

I have doubts about this. How you wrote source code read analog input 2ch plot to curve trac and show on tft lcd to smooth it..

Thanks you very much.

  Are you sure? yes | no

dardo wrote 08/19/2017 at 01:48 point

Hola, gracias por tan gran aporte, espero puedo resolver la versión 3, si puedo ser de ayuda dejo mi mail trcelectronica@gmail.com 

Le hago una consulta, el transformador de características es?

El código en la descarga es de la versión 1 ?

En la versión 3 usaría tres arduinos?

El MICRO, el DUE y el MEGA?

Saludos Dardo

  Are you sure? yes | no

Davey3D wrote 06/28/2017 at 13:58 point

Do I read correctly that you are not able to add beyond version 1? It would be nice to know so that I can plan to add some features myself or wait for you to release the information or an actual product to buy. I don't have nearly as many features as your V2. 

I think it  would make a nice product but I am guessing that you may have troubles with Huntron or some of the other manufacturers. I hope they have not caused you legal difficulties! :-( Perhaps you can sell it to them lol? Theirs looks primitive compared to this and I'm sure will not cost $2k ~ $4k  to make.



  Are you sure? yes | no

Máté Tóth wrote 06/28/2017 at 16:20 point

Hi,

I did not  have any problem with Huntron. I can sell my trackers I guess.

The Version 1 documentation you can find at the download section, but it is not too well made. I am working on a new updated Version 1 with better documentation and a new Version, which is called Version 3. It will be like the Tektronix TR210, but much cheaper. 

The Version 2 is waiting for some finishing, but it is in use at the moment. I am not sure what I wanna do with these, but I am sure I would like to make it open source and both make a kits from them, so I can get some money to develop new features.

If you are interrested, i am locking for people, who wanna help developing these.  (Like Open source project) 

  Are you sure? yes | no

Davey3D wrote 06/28/2017 at 21:32 point

I think a kit would be very popular. It would be too ambitious for me to tackle without one. I'm a hardware person that knows just enough programming to be dangerous lol. I don't know what I can offer there. Is there specific help that you're looking for? I have been thinking of ways of making something like this for a while. I decided to google before I started serious design and this popped up.


The V1 docs are fine from what I saw.  Perhaps not for an inexperienced person. The big limitation in the V1 design as you know and resolved is that it relies on the fixed 60hz signal. The other you've solved as well- the ability to compare 2 channels "A-B" testing. 

There are a couple of other players in the game that you may
already be aware of. This is probably closest to what you're doing- big
difference is that it's windows based. I think it's around $1K - $1.5K from
memory.  google: FADOS9F1


At the other end is the Saelig ABI System 8. It's an extensive system- starting around $6k. The AMS is the VI module. "Using a novel approach to V/I signature testing, the SYSTEM 8 AMS increases test coverage by varying the frequency of the test signal to observe the DUT's Device Under Test) response over a frequency range. This can lead to finding faults not detectable with other instruments."

It has 64 channels and can do a matrix scan. Rather than comparing the test point against a single ground reference, it can test one test points against multiple other test points. Our company is looking at buying one as the 64 channels and requiring less operator interpretation is better for a production system. 


Thanks!

  Are you sure? yes | no

Walter wrote 06/19/2017 at 03:12 point

This project is way awesome!

  Are you sure? yes | no

PROFESOR wrote 03/08/2017 at 21:31 point

Hi, Máté Version 2 is a beautiful project as you can see from the picture. I wish you continued success.

  Are you sure? yes | no

Máté Tóth wrote 03/08/2017 at 22:06 point

Thank you, I am planing to make a PC software for it, with that I will can save curves, and that is the goal.

  Are you sure? yes | no

PROFESOR wrote 02/24/2017 at 17:11 point

Hi, Máté wonderful project. You will share files. ??

Best regards

  Are you sure? yes | no

Máté Tóth wrote 02/24/2017 at 18:20 point

Hi PROFESOR, Thank you. To be honest with you all of who here because of you want to build it. I have to tell, I have many many reasons why I should not to publish everything about my Version 2. It is not fully my decision.  I am sorry, have to tell you now, but I can not publish the version 2 schematic and code.

But I will polish the Version 1 and fix al those bugs That have, and I will give every information about the Version 1 tobyou

  Are you sure? yes | no

xt1541xt1541xd1541 wrote 02/24/2017 at 16:52 point

cool Mate hope you finished soon !

  Are you sure? yes | no

Máté Tóth wrote 02/24/2017 at 18:13 point

I hope so

  Are you sure? yes | no

daniel elvas wrote 02/21/2017 at 17:29 point

hi Máté could you upload curve tracer V1 files if thats ok thank you

  Are you sure? yes | no

xt1541xt1541xd1541 wrote 02/07/2017 at 12:10 point

keep on going dude ur great !   we hope to see the final version soon ur freind 

respect

  Are you sure? yes | no

xt1541xt1541xd1541 wrote 02/03/2017 at 12:00 point

hello Mate i would like to help with some funds i find it a very nice project far away to be simple 

and at anytime i would like to see it work im a repair technician with a littel money cant afford a huntron or an abi or a deltest or a polar or fados1F7

anytime i would loe to help make a production version for you better casing better screen 

  Are you sure? yes | no

Máté Tóth wrote 02/03/2017 at 19:28 point

That is cool man, first I would like to make a working prototype of it and after I have some plan, to make both the V1 and the V2 ready for production. I would like to help people like you or me and make a cheaper but usable versions. 

If you have any good idea or question, or anything, go for it, I am open for ideas. And thank you for the offer I will ask you If i am stuck with the project

  Are you sure? yes | no

xt1541xt1541xd1541 wrote 02/03/2017 at 19:47 point

ok Man the ideas that i have is making a cnc version of it 

what i mean is make a programmable cnc to verify some tp you already tested on a working board and save them then later compare to other non working boards

  Are you sure? yes | no

xt1541xt1541xd1541 wrote 02/02/2017 at 23:12 point

hope we see the new version soon it is very very nice 

thank you my freind it is a wonderfull tool

  Are you sure? yes | no

Máté Tóth wrote 02/03/2017 at 19:12 point

Thank you, I am working on it, it is going well, maybe a couple of day and I can test the basic functions on it, but I have to work a lot on it still

  Are you sure? yes | no

PROFESOR wrote 01/30/2017 at 22:57 point

Hi,Mate please explain save button function which pin.??

  Are you sure? yes | no

Máté Tóth wrote 01/31/2017 at 06:35 point

It is buttonPin = 12,

So digital PIN 12 is the input. Do not forget to add a 10k pulldown resistor to it

  Are you sure? yes | no

PROFESOR wrote 01/29/2017 at 19:06 point

Waiting version 2 Test video. Best regards. :)

  Are you sure? yes | no

Máté Tóth wrote 01/30/2017 at 09:13 point

Thank you PROFESOR, I am working on the analog section recently, hoppefully it will be done shortly.

  Are you sure? yes | no

mkpael wrote 01/26/2017 at 11:50 point

Do you have some equivalent for the TLC2721P?

  Are you sure? yes | no

Máté Tóth wrote 01/26/2017 at 18:24 point

You can use any precision op-amp, like TLC 272 CN, TLC 2272 IP, TLC 2272 CP (these are dual precision op-amps), or two OP07CP, which is a singe op amp, that why you have to use 2 of those. OP07CP is much cheaper, and maybe better, but I did not have those on hand.

  Are you sure? yes | no

mkpael wrote 01/27/2017 at 16:19 point

ok. thank you.

  Are you sure? yes | no

Similar Projects

Does this project spark your interest?

Become a member to follow this project and never miss any updates