This TTL circuit was found in the December 1990 issue of Radio Electronics magazine. The circuit has a 50% duty cycle. It must be powered by 5 V.
Found in a 90s EDN, this circuit makes use of components that are not currently common. The power...
Using 555 integrated circuits, this alarm circuit was found in a 90s American documentation. The signal...
Found in a 90s Popular Electronics, it serves both TTL and CMOS logic. The injector can provide 10...