They switch on with a base voltage of around 0.6V to 0.8V. Circuit diagrams often show transistors in switching circuits. For an ideal NPN transistor, the switch-on voltage at the base is ...

Both are used in various amplification and modulating circuits ... which is referred to as switch mode. It’s easy to remember that NPN stands for Negative-Positive-Negative and PNP stands ...

This is a simple clap switch circuit with high sensitivity ... but there are many others that should work OK. In the circuit, I actually used MPSA15 (NPN) and 2N5087 (PNP) transistors.

Here is the circuit ... to switch on various AC devices through an IR transmitter. It uses the Photo transistor L14F1 to detect IR signals from the transmitter. Photo transistor L14F1 receives the IR ...

photo and diagram latching switch single pole single throw (SPST) switch rocker mechanism to open or close a circuit commonly used in power strips and appliances Photo and symbol for single pole ...