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