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 circuit uses a common-cathode 7-segment display powered from a decoder and a 0-9 counter. The...
Suggested by Linear Technology in an old documentation, this circuit produces 60 Hz rectangular...
In the figure we have a typical voltage follower. In a voltage follower the voltage gain is...