This circuit is from a 1968 documentation using one of the first integrated circuits available at the time, the TAA370. The circuit is powered by 1.3 V using a 200 ohm handset.
This simple timer causes an LED to blink after an interval of the order of 7 minutes which is the...
The presented circuit uses common transistors that can be the BC549. The maximum amplitude of the...
This electronic roulette has several draw options depending on the position of the selector...