A simple chip tester for retro 4, 6, 8, 10, 12, 14 or 16-pin chips, designed around an Arduino Uno, some resistors, a ZIF socket, and a couple of breadboards.
Full description at https://www.gammon.com.au/forum/?id=14898
To use the code unmodified, wire up as follows:
| ZIF pin | Arduino pin | Notes |
|---|---|---|
| 1 | 2 | Via 330 ohm resistor |
| 2 | 3 | Via 330 ohm resistor |
| 3 | 4 | Via 330 ohm resistor |
| 4 | 7 | Via 330 ohm resistor |
| 5 | 8 | Via 330 ohm resistor |
| 6 | 9 | Via 330 ohm resistor |
| 7 | 5 | Via 330 ohm resistor |
| 8 | 6 | Via 330 ohm resistor |
| 9 | 12 | Via 330 ohm resistor |
| 10 | 13 | Via 330 ohm resistor |
| 11 | A0 | Via 330 ohm resistor |
| 12 | A1 | Via 330 ohm resistor |
| 13 | A2 | Via 330 ohm resistor |
| 14 | A3 | Via 330 ohm resistor |
| 15 | A4 | Via 330 ohm resistor |
| 16 | A5 | Via 330 ohm resistor |
| 7 | 11 | Direct to ZIF pin |
| 8 | 10 | Direct to ZIF pin |
| 16 | +5V | (Optional - see text of article) |
Compile and upload sketch (tested on an Arduino Uno). Open the Serial Monitor, set baud rate to 115200, line ending: newline.
Follow prompts in the serial monitor. Specifically:
- L : lists all known chips
- S4, S6, S8 ... S16 : scan for chips with that many pins
- <chip number> : search for that chip
- T : test a chip previously found by searching
Not all tests have been verified by the author. Many are not exhaustive, but should be adequate to identify a chip, or to see if its basic logic functions and output drivers are working.
Only connect pin 16 on the ZIF chip to +5V if your target chip expects power (Vcc) on that pin.
Chips are inserted at the top of the ZIF holder. That is, pin 1 is always in the same place.