This series LED circuit was found in the February 1992 issue of Radio Electronics magazine. The effect's speed is dependent on C1 and adjusted by R3.
This excellent quality transistor amplifier using Darlington transistors was found in a 1980s...
We find this circuit in an American 1980s documentation. Modern equivalent integrated circuits can be...
This circuit is intended to manipulate a transmitter (CW) from coded audio signals recorded on a...