The timing steps of this circuit are indicated by a 7-segment display. The circuit was found in documentation from the 90s. The capacitor next to the 555 determines the timing steges.
This circuit can be used to test zener diodes up to 25 V using a standard multimeter. The voltage...
This circuit was found in a Ferranti documentation from 1969. The transistors are common types of...
We found this circuit in a Popular Electronics from 1992. The circuit shows how to use a variac in a...