RetroChip Tester Pro Thread - Page 1
Forum section: electronics / testgear

author: watchmaker
author_rank: Unknown
timestamp: May 11, 2024, 03:05:28 pm
content: I came across this instrument by accident in one of the IC tester threads here. A search on the forum found no thread dedicated to this device.I ordered the boards (including device adapters which I probably did not need) from Germany. I then ordered the parts from Digikey which was about $125 less than from the US partner. Plus I ordered more of things (like resistors, transistors, diodes) than needed so I could select the best matches. Not sure this is important, but it is my instrument, so.... No Ali parts.I also ordered the board populated with the processor and programmed. FWIW, I asked Stephan one question (about the optional power supply board) which he answered within a day. This given he must get a lot of questions that are already covered in his excellent assembly, programming, and user documents. He even includes interactive parts locators!The firmware with library is updated on a regular basis. Rather than take up space on processor, he maintains an interactive database that users can download to search for device analogs.They are so good it fired up on my first power up.The device is so flexible because Stephans has it programmed to test devices by position in the ZIF socket. When a device is called up, a notation is included if its position needs to be changed.This is a LOT of work.There is a new firmware version since I ordered the boards in February. I think this device will not be orphaned anytime soon.I just got an email for new firmware version!This device seems well suited to the non-professional who, like me, has a stock of ICs from student kits or other sources where they may have been used. A professional is just going to buy new.Assembly was not difficult, it took me about 10 hours. There is plenty of room and it is all through hole work. It can be powered directly from a bench supply via terminals on the rear, by USB with 1 amp, or via a 9V barrel connector. When I supplied with 9V, it used less than 200mA at idle.Below are pics of it in the optional Lucite case (which makes sense after spending about $350 and time), and test results for an IC. In one of those tests, the IC was moved off position to show the info reported when a fail is reported. The results displayed are explained in the manual.

author: armandine2
author_rank: Frequent Contributor
timestamp: August 31, 2025, 11:43:43 am
content: Quote from: watchmaker on May 11, 2024, 03:05:28 pm...+1...had a few difficulties, nearer 10 days/weeks than hoursJust plugged mine in for the first time - but it came on straightaway, no obvious problems found.But have only done one test with the different USB connectors (micro and usb B).Yet to assemble case , read through manual, connect the dc/dc modules

author: armandine2
author_rank: Frequent Contributor
timestamp: September 01, 2025, 02:33:55 pm
content: ..an extended "kit" build in effect - with your own source-the-components challenge...but so far a good learning experience (tutor), even before you get to use it. That said I checked a dozen old 4000 series logic chips last night...there is a crimping exercise (pictured)...and a safety feature, don't connect the dc/dc module when you have any main pcb shunts in place (pictured).

author: armandine2
author_rank: Frequent Contributor
timestamp: September 03, 2025, 06:23:35 am
content: ...testing 74 series logic i.c.s last night, had a run of failed chips indicating a tester fault (and previously good now test bad)...so some fault finding now - the fault shows up as one pin reading after ground is wrong.[edit - next evening, cleaned board more thoroughly - seems to be good again.][edit - search test to identify logic chip][edit - add SRAM testing][edit - add PROM test - use compatibility list, 7488 = 6330]