Arduino Projects: Digital IC Tester With Embedded Truth Table

Bhaskar Jyoti Borah is studying physics at Tezpur University, Napaam. He has received INSPIRE scholarship under DST scheme. He has also won The Optical Society Best Scientific Model award at South Asian Workshop on Optics and Photonics-2015, organised at IIT, Guwahati & Rajib Biswas is M.Sc from Dibrugarh University, Dibrugarh, and a doctorate from CSIR North East Institute of Science & Technology, Jorhat. Currently, he is working as assistant professor in department of Physics, Tezpur University, Napaam


Author’s prototype was used to test the following ICs successfully: 4000, 4001, 4002, 4011, 4012, 4023, 4025, 4029, 4030, 4049, 4050, 4068, 4069, 4070, 4071, 4072, 4073, 4075, 4077, 4081, 4082, 4093, 5408, 5409, 5411, 5421, 5479, 7266, 7400, 7401, 7402, 7403, 7404, 7405, 7408, 7409, 7410, 7411, 7412, 7414, 7420, 7421, 7427, 7430, 7432, 7473, 7474, 7476, 7478, 7479, 7486, 74132 and 74393.

Fig. 3: Circuit diagram of the arduino based digital IC tester
Fig. 3: Circuit diagram of the digital IC tester

ICs 4011, 4023, 4029, 4030, 4069, 4093, 7402, 7404, 7414, 7476 and 74393 were tested in EFY lab.

The number of supported ICs can be enhanced with the incorporation of new functions and libraries to the program. As ATmega2560 MCU has 256kB of flash memory, a program for very large number of ICs can be uploaded.

Unlike a typical IC tester, this device provides many useful features to its user. Nokia 5110 display panel and a 15-key keypad were used in this device for designing a suitable user interface, which enables the truth table exhibition possible.

Users can find help on the testing procedure. While entering the inputs (for example, IC number and time interval), they can clear the digits if entered incorrectly and re-enter the correct ones. Truth tables for each individual gate can be paused for better observation and can be skipped for saving time. There is feasibility of reproducing the previous stage (for re-entering the data) without resetting the device.


table-216MHz of processing speed makes the time response of this IC tester pretty good. No time-lag is observed while accepting data from the keypad and displaying information over the LCD panel. In case of auto-search, this prototype takes about 0.5 seconds on an average to detect the IC. All these features make this device powerful and user-friendly. A comparison of its features and specifications with two other branded IC testers (DICT-02 (Brand: Kitek) and Leaper-1A (Brand: Leap)) is shown in Table I.


A brief note on the coding is shown in Table II with different uses of variables and in Table III with uses of important functions.



  1. I’m interesed me in the “IC tester” and I’m having two problems.
    A rebound problem on numeric keys (visible on the video demonstration posted by the author on the Net).
    And another problem: all circuits with open collector outputs (7403-7406-7409- etc …) I can test are found bads by the tester while most are surely very goods.
    I just check in your issues from February 2016 to November 2016, if a correctif was released, but it seems that not.
    Thank you for your attention and advices
    Serge COUPET

    • please describe the ‘rebound problem’ you have noticed in the video. I am not able to understand your question.
      About your second issue, please check your connections. To work with my code (with NO modification), you must have the connections exactly as per the circuit diagram. If you change any connection, you must modify the code.
      If you experience compilation error, try using old version of Arduino IDE (preferred version: 1.0.5)

  2. Helo my name is Ronald I was looking the digital IC tester, end I wuld like to make one to my uses,
    I have one arduino board mega 2560 . but Idont have the firmware code to programing the arduino board if you have code please you can sand me this link [email protected]

    • All recuired codes are available at the end of this article. You can download it.
      If you experience compilation error, try using old version of Arduino IDE (preferred version: 1.0.5)

  3. Here’s the reply from author Bhaskar Jyoti Borah:
    Please download the proper libraries available in the efy website. It contains all the required files for both lcd and keypad. Use older version of Arduino IDE (preferably 1.0.5).

  4. I would like to introduce myself as a undergraduate engineering student from Tamilnadu. while  I am in the search for my project work I got an opportunity to see your article on EFY regarding Arduino based IC functional tester. I was impressed with the article and as a continuation with that interest towards the Arduino I got some doubts. if u could spend ur valuable time to clear my doubts, it would be the greatest help for my upcoming project work….
    Is it possible to check the Mux / Demux, Encoder / Decoder , half adder / subtracter and shift registers.

  5. Digital IC detection was the easy part, analog IC’s offer a complication that far exceeds anything you have here. The Ic’s this device can test have been all but phased out in favor of the logic of cheap microcontrollers. Granted, the digital chips are still used in a minimal way, as support to microcontrollers, to extend their abilities. They are mostly all SO, (surface mount) devices, that are more difficult to test, and so cheap that the cost of a device to test them, plus the time required to test it, make it not cost effective. If you can’t read the number on the part, toss it in the trash and get another.
    When you can successfully test 100 common analog IC’s, and fashion a way to test SO devices as well, you will have something worth the time it took to write about it. This is not something worthy of the level of education you have.

    • Thanks for your compliment. You may know that it’s not a patent. It’s simply a project work. I hope people like you will make it worthy by including support for 100 analog ICs as well as SMDs. I hope to see a patent from you in the near future. Good luck!

  6. I’m interesed me in the “IC tester” and I’m having problems.
    A rebound problem on numeric keys
    And where join number key.?

  7. can i use serieal monitor in arduino software instead of NOKIA 5110 display
    if so could you please help me with the source code…

    • You should be able to “fork” Bhaskar’s code on your own, adding serial commands. I plan to do this soon. I had an IC test set but sold it. I plan to glue dupont male-male 2.54mm patches from mega to 170 pin mini breadboard as test bed, modify code for serial monitor, and use Bhaskar’s concept to test logic IC’s prior to selling my stock before retirement. Kudos to Bhaskar for saving 150usd or more with DIY. Mega 256 clones cost about 16cdn in Eastern Canada. The secret to stay in small electronics business=cost control.

  8. Thank you M. Bhaskar Jyoti Borah for sharing your efforts with the electronicsforu community.
    I have build the shield for the Arduino Mega 2560 IC Tester using the PCB Plan published. Unfortunately there are two mistakes: 1) the Nokia 5110 Display stands on its head and it covered the ZIF Socket so I couldn´t stick in the device under test. I fixed it with double headers to get room for the test-device. Yet the Display was still head down. I took eight Dupont Line male to female to correct the state.
    2) In doing so I recognized the resistor for the backlight goes to minus. This doesnt work. I connected the Resistor R22 to plus and the backlight worked.
    Now all works well and I will test the limits of the Arduino sketch

  9. Sir, I am doing project digital ic tester with embedded truth table since 2 months , I did not get any result till now. Please help me sir

    • I work with Arduino IDE 1.8.5 and Windows 10. The Programm works but the results are limited. See the comment from JoeMass Dec 18 17. Nevertheles, learnt somethig new. Thank you. Michael

  10. I have made this project but Don’t suggest anyone doing this because circuit is complex and code is just not working my whole effects and money wasted ??

  11. My project doesn’t work. When I give 12V to it, it says welcome and in the right bottom corner skip and nothing else happened. I have etched the layout from this website, checked the PCB withput errors and then soldering the parts. nothing work, only welcome and skip appears in the display. My Arduino Mega 2560 R3 was programmed with Arduino IDE 1.06 and a second try with Arduino IDE 1.82. Result is the same. Help me please!!! Thx


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