This circuit was found in the July 1994 issue of Electronics Now magazine. The relay can be rated at up to 12 V and 100 mA. The transistor is a general purpose transistor.
We found this power supply in the 1982 SGS Linear Integrated Circuits manual. The L296 is not...
This circuit monitors the voltage of a 12 V battery. The indicated levels let you know if the...
Suggested by Motorola documentation from the 1980s, this circuit can be implemented with...