Found in Popular Electronics from the 90s, this circuit has LED indicators that show when the battery is full charged and the shutdown relay is activated.
We found this circuit for vocal effects in the September 1990 issue of Radio Electronics magazine. The...
This circuit was found in a 80’s American documentation. The adjustment trimpot is from 47k to...
This circuit produces a single pulse whose duration depends on the capacitor. The circuit is from an...