If you need to test 74xxx chips then I have a proposal for you.
Author of MERA400 channel on YT made a new version of his IC tester. Open, Arduino based, looks easy to use.
https://github.com/jakubfi/ictester
https://www.youtube.com/watch?v=osW2eTuzAC8 for video (in Polish)
#ttl #74xx #74xxx #electronics #mera400 #retrocomputing #ictester
#ictester #retrocomputing #mera400 #electronics #74xxx #74xx #ttl