This control for 1/15 HP motors with 5,000 rpm for 115 V power grid was suggested by a Motorola circuit manual from 1968. The SCR supports more modern equivalents.
Small variations in the resistance of the subject's skin holding the test leads are detected by...
Recommended in an article in Electronics Now magazine to draw attention, this circuit makes two...
This circuit, found in an old publication, uses operational amplifiers from National Semiconductor that are...