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diyengineers.com
How to use the BC547 Transistor (NPN) (with examples) - DIY Engineers
Learn how to use the BC547 NPN transistor as a switch. Use the BC547 to switch a bright LED flash on/off with and without Arduino.
May 5, 2022
BC547 Circuit Tutorial
12V Relay-based Timer Switch Circuit Using BC547 Transistor
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