See complete documentation here.
The Chip Tester features: (bold items are new for Pro version):
- Tests 5V digital logic in DIP socket chips up to 48 pins;
- Normally closed socket makes stronger connection than ordinary ZIF sockets;
- Clamping diodes on every pin protect against under and over-voltage conditions;
- Firmware upgradeable with tests added based on user requests & feedback;
- Confirms working chips to help narrow down problems;
- With additional accessories, capable of diagnosing chips in-circuit to help you decide which chips to desolder (see below for details);
- Supports testing 5V logic of chips in a wide variety of machines;
- Capable of “ripping” ROM chips to Micro SD card (card not included);
- Pays for itself when it helps you rescue a machine you’ve given up on;
- Sturdy “sammiched” PCB case with 3D-printed buttons and standoffs;
- 6′ “A to A” USB cable for power (you must provide your own USB charger; 2A or more recommended).
- Jumper wires to hook up power & ground (these make it possible to test chips that use power or ground on any combination of pins).
About in-circuit testing:
- Test clips and associated adapters/wiring are not included (you must purchase 3M or similar 0.3″ and 0.6″ width DIP IC clips with minimum pin count for the chips you want to test);
- If you use a larger clip that overhangs a chip, the tester can be configured to test at different vertical offsets;
- WARNING: DO NOT USE for in-circuit testing while machine is PLUGGED IN, as this can damage the tester permanently.
Optional accessories available for purchase:
- Clip adapters for wiring in-circuit test clips;
- CartRip™ adapter to rip ROM images from a Commodore 64/128 cartridge.
- CartRipVic™ adapter to rip ROM images from a VIC 20 cartridge.
- CornBit™ to replace 24-pin EPROMs.
- CornBitXL™ to replace 28-pin EPROMS.
Recommended accessories to test in-circuit (not sold by BackBit):
IC Test Clips (this is the minimum set to be able to easily test most DIP chips)
*make sure you do not get “nail head” clips as those don’t attach to jumper wire
*if you get a 24 or 28 pin clip, make sure to get the wide one, i.e. 0.6″ width
*these are much cheaper used or new old-stock on ebay
* use male/female extension wire; any square pin wires with 2.54mm spacing should work;
* best to get configurable-sized headers like these, as single pin jumpers tend to get jammed with so many in a row; you just use a few of these for each side of the junction, i.e. 2x 10 pins for the 20 pin clip, 4x 6 pins for 24 pin clip, 4x 10 pins for 40 pin clip, or other combinations will work:
https://www.adafruit.com/product/3146 or https://www.adafruit.com/product/3145