This circuit was found in Mullard's transistor application manual from 1960. More modern transistors can be used. The zener diodes used have the indicated voltages.
This circuit is from a Radio Electronics magazine from August 1990. The indicator module is of a...
This small transmitter has an RF amplifier stage with coupling made from the central socket of the...
We present a different voltage regulator that is based on a transconductance operational...