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In this video, we explore the tricky challenges in trying to design an electrical continuity tester that can survive almost any abuse we can dish out.
Schematics Download here:
https://pronto-core-cdn.prontomarketing.com/2/wp-content/uploads/sites/2025/2020/07/Schematics_Continuity_Tester_4.pdf
Another enthusiast has explored and improved on my design, if you want to build one, follow his lead:
https://www.xul.it/blog/index.php/2020/08/15/the-ultimate-continuity-tester/
https://github.com/oxullo/uctester
I have no affiliation or sponsorship from Bournes, just helping you find more info about the TBUs.
https://www.youtube.com/watch?v=teaVJbITCng
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