This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at the end of the timer, erasing the other. The timing can be increased by increasing C1.
This circuit uses BCD switches to program the frequency to be divided. The circuit is from a Radio...
This circuit is based on an old Texas Instruments' 80s integrated circuit. The integrated circuit is no...
The advantage of this circuit lies in the fact that it does not need a negative source to generate...