The circuit below was suggested by the Motorola Linear Databook of 1990. The component used is uncommon and the power can be between 7.5 and 12 V.
Closing and opening S1 for a moment to charge the capacitor, the transistor conducts the load. The...
The basic component of this circuit is a general-purpose SCR. The voltage is according to the...
This simple preamplifier was published in Radio Electronics magazine in February 1958. The battery...