We found this CMOS circuit for excitation of a relay in an old documentation. The transistor is a general-purpose high voltage as used in the power supply.
This simple amplified relay circuit works on RF signals. The power supply is according to the...
This circuit is from a 1978 publication. It can be assembled with BC548 transistors for NPN and...
This simple power supply is regulated by two zener diodes which, for a current of up to 200 mA,...