Digital IC Tester for 74 series and 40 series

[Binu]

The chip tester verifies the functionality and timing of a variety of 7400 series integrated circuits. Students taking Digital Logic Design Lab, Use these chips often in their laboratory.
The IC to be tested should be placed on the ZIF socket and the Microcontroller prompts the user to enter the IC number of the chip to be tested. After entering it the microcontroller will check the IC as per the truth table of the IC which is stored in its ROM. It will check each aand every pin of the IC and produce the Output detaily. Like "Gate 1 is good", "Gate is Bad", "Counter 1 is Good" etc
For IC's list that can be tested by this project <a href="http://www.8051projects.info/files/74series.txt">Click here</a>
Program: ICtester.zip

[vamsi]

hi binu
have you tried this tester?? i would like to do this for my college lab purpose

[Binu]

All the projects published on this website are done by me, and this project was finished successfully and they are running in many college Labs.

[garnisi]

Hi binu,you have a very interesting site on the 8051,regarding this tester,can you please specify the pin numbers of the lcd display in the schematic diagram because I can't understand it
Thanks.

[vamsi]

hi binu

thank you.. do you have the pcb layout for this project... can you mail that to me please
vamsi_karteek@yahoo.com

[Binu]

The pin numbers are given in the schematic diagram. please check it the starting pin number is 1 and the last pin number is 16.

I dont have the PCB layout, i have done this project on multipurpose PCB.

[garnisi]

First of all thanks binu to answer my first problem,
I am a student in the university of malta and I am trying to make an ic tester and I am using your site to help me doing it, For my project the ic that I want to use is the AT89C51 and not the AT89C55 like the one in this project,is there great differences between these two?,another problem is that I can’t recognize the device named 10K SIP (2),is that a latch between the micro and the 20pin ZIP?
thanks for answering my problems!

[Binu]

my project the ic that I want to use is the AT89C51 and not the AT89C55 like the one in this project,is there great differences between these two?

You cant use At89c51 in place of at89c55 in this project, since the source code size is about 15kb. The 89c51 has a maximum flash memory of 8k only, but 89c55 has an memory of 20kb.

10SIP is nothing but 8nos of 10k resistors. In that all the one terminal of the 8 resistors are tied to the first pin, please see the following image.

[garnisi]

Thanks binu for answering me once again,
Now I have another problem regarding the pinouts of the keypad,can you please send me some detailed information how to interface the keypad with the microcontroller in this circuit.
Thanks!.

[Binu]

Connect the Keys in matrix format and interface to the microcontroller.
Connect ROW1 to P3.1, ROW2 to P3.2, ROW3 to P3.3, ROW4 to P3.4, COL1 to P3.5, COL2 to P3.6 and COL3 to P3.7.