We found this circuit in an Australian documentation from 1991. The circuit is suitable for SMD mounting thus making it very small. The circuit was sold in a kit at the time.
This relay shield was found in the October 1993 Electronics Now magazine. The circuit is powered by...
In the figure we have the basic configuration of a regulator for 12 V x 1 A suggested by Motorola in...
This circuit can be used as part of a Vox project or as an input shield for a microcontroller that...