Introduction: Smart IC Tester
We all know what IC Testers do... but for those who don't - IC Testers are devices which are used to test Integrated Circuits by sending in Pulses as per their Truth Table. Generally, IC number is fed into IC Tester and a comparison test is made against that particular IC's Logic Table.
A smart IC tester is far more capable and better than a generic IC Tester, it has an ability to detect and check the connected IC along with a manual mode. Our IC Tester features a Touch LCD which gives a better user experience and easy to understand UI.
IC Testers maybe costly instrumentation devices but this one is just under ₹1600( ~$25), pretty cheap right ?
Step 1: Let's Shop Some Stuff !!
- 1x Arduino Mega 2560
- 1x 20 Pin ZIF Socket
- 1x 2.4 inch TFT touch Screen LCD with inbuilt SD Card Slot
- 1x 4GB MicroSDHC
- 1x 6-pin Extra Length Female Header
- 3x 8-pin Extra Length Female Header
- 1x Male Header Strip
- 2x WS2812B (Optional)
- 2x 100 nF 0805 Capacitor (Optional)
- 1x 180Ω 0805 Resistor (Optional)
Tools and Additional Supplies
- Soldering Iron
- A Laptop
- USB Cable to connect Arduino Mega 2560
- MicroSDHC Adapter
Step 2: Designing the PCB
I designed a shield for all components to fit-in and chose the Arduino Mega as my micro-controller board since both the ZIF Socket and LCD can be put side by side giving the build a compact and portable look and feel. I used Autodesk Eagle for the PCB Designing part (I've attached the eagle files below).
A big shoutout to guys at JLC PCB for sponsoring PCBs for the project. Do check them out they offer $2 PCB Prototyping and Free Shipping on First Order.
Step 3: Shut Up and Solder
Once you have all the components along with the PCB, just solder them in place as shown and you are ready to go !!
Once you're done with soldering put-on the LCD Shield and Female Headers and this completes your assembly for IC Tester.
Remember - "If it smells like chicken, you're doing it wrong" ;)
Step 4: Code? Yes..!!
Step 5: Preparing Database... a Time Consuming Task
I've compiled up a basic database for Component Tester that includes basic ICs. The database is in database.txt file on GitHub. Copy this txt file on SD Card and insert it in the Touch LCD Shield.
[Test Case 1]
[Test Case 2]
[Test Case N]
Sample Test Case-
Say I have IC-7426, a sample test case would be
Here 0/1 would be used to specify Input and H/L (High/Low) to specify output and V is used to denote VCC and G is used to denote Ground. Follow order from Pin 1, 2, 3, ..... 7, 8, 9, .... 14 for above IC
Step 6: Fingers Crossed !! Testing It All Together
Let's Upload the code and boot the IC Tester.
FINGERS CROSSED !!
And it worked great !!
Step 7: Happy Testing !!
You are welcome to contribute to the project and database on GitHub.