https://electronicsarea.com/continuity-tester-using-741-ic/ Electrical and Electronics Tutorials and Circuits Tue, 16 Jan 2024 14:58:24 +0000 hourly 1 https://wordpress.org/?v=4.9.26 https://electronicsarea.com/continuity-tester-using-741-ic/#comment-387996 Sun, 01 Jan 2023 22:39:38 +0000 http://electronicsarea.com/?p=2926#comment-387996 Not a bad piece to have around the bench or shop but if it were me, I’d prefer the LED to be green indicating a good connection and a to illuminate only when a connection is good. A red green dual LED would be nice to indicate red for open and green for closed circuit. Red on till circuit connection is good then switch to green. I’m going to try to make this basic circuit but add in a NPN and PNP to the output to switch the LED from Red to Green.

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