Controlling Simple LED Bar Graph With Arduino
Controlling Simple LED Bar Graph With Arduino
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instructables.com
� AC Line Detector with Bar Graph LED Indicator In this project, I’ve built an AC Line Detector circuit that can sense the presence of live AC wires from a short distance — and visually indicate the signal strength using a bar graph LED display. This simple yet powerful circuit works like a non-contact voltage tester, showing how close you are to a live wire through the number of glowing LEDs. � Components Used 4 × NPN transistors (BC547 or 2N3904) 1 × 1 MΩ resistor 1 × 100 kΩ resistor 1 × 220 Ω
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� AC Line Detector with Bar Graph LED Indicator In this project, I’ve b…
7.6K views7 months ago
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