This circuit is from a Motorola integrated circuit manual. The integrated used is no longer common in our market and the power transistor must be equipped with a heat sink.
Found in a magazine 73 for radio amateurs, this circuit has two settings, one for the interval and the...
This circuit consists of a single Hartley oscillator using a bipolar transistor that can generate...
This simple timer, which activates an LED indicator, but which can be modified to activate a...