This circuit was designed to power the previous circuits of the wireless sound system, but it can be used for other purposes. The circuit is from a Radio Electronics from August 1988.
When the probes of this circuit meet water, the relay closes its contacts. The circuit is from a May...
This circuit can work with almost any JFET. The circuit is from an Electronics Now from April...
This optical pass-through shield can be used in various applications, such as object sensing or...