Found in a 1965’s Electronic Design, this circuit operates with a voltage of 1.5 V. The relay can be of a reed relay or other type.
This circuit can source 3 to 12 V with currents up to 500 mA depending only on the transformer....
This circuit was found in an Electronics World of 1968. The transistor can be any general purpose and...
The network formed by resistors and capacitors determines the frequency of this sinusoidal...