Bob's Basic Digital Ring Tester project

Basic Digital Ring TesterThe Bare Tester

After I designed the "Blue2" microcontroller-based digital ring tester, I
wondered how hard it might be to make a similar tester using ordinary
 components. This was the design I came up with.

Click to watch the video demo on YouTube.

I don't plan to make and sell them, but I'm making all the design  information
available for anyone who's interested. Everything is in one zip file. Click here
to download it
. Have fun!



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5th June '21