This circuit produces the sound of a motorcycle or an outboard motor. The frequency is adjusted in the pot. For supplies above 9 V the BD136 must be equipped with a small heat sink.
This amplifier for old record players has RIAA correction and was found in documentation from the...
This trip switch circuit was found in a Popular Electronics from the 90's. The frequency basically...
This circuit was originally designed to operate with the CB18751E which transmits its signals via...