Originally created to power an 80's RTTY printer, this circuit can be used in other applications. The circuit is from an Amateur radio of the time.
We found this circuit in a 1986 documentation. It causes 40 LEDs to flash sequentially. The big...
Found in a National Semiconductor manual from the 90's, this circuit uses components of the time,...
Simple timers can be designed using inverters or any other gate that can be connected as inverter. Figure...