This circuit is the factory version of the LM386 low-power amplifier. The sound quality is excellent, and the power can be supplied with voltages from 6 to 16 V.
We found this circuit in documentation from National Semiconductor. For the medium wave range the...
This simple indicator circuit uses two transistors indicating when the voltage of a 12 V battery is...
This timer controls two relays, each with a different timing, activated separately. The circuit is from...