This 18 V x 300 mA power supply was found in a 1969 documentation. The integrated circuit is difficult to obtain today.
Found in Popular Electronics from the 90s, this SCR control circuit for DC motors has an unusual...
This circuit was found in a 1973 Radio Elettronica magazine. The Italian magazine no longer...
This basic circuit is from an old documentation. The relay must be 50 mA maximum and must have a...