This circuit is from a 1978 magazine Radio & Electronics Constructor, but it can be assembled with 1N4004 diodes and TIC106 SCRs for motors up to 1A. The transformer has a secondary 12 V x 1 A.
Indicated for scanning circuit applications, we found this generator in a Radio Electronics from the 80s....
This circuit produces sounds that depend on the measured voltage and that can be compared with a...
This circuit was obtained from Radio Electronics from the 90s. The infrared sensor is of an...