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 changing C1.
The frequency of this clock oscillator is given by the crystal. The trimmer sets the ideal...
We found this circuit in a Radio Electronics Experimenter from 1990. The circuit uses a common...
This circuit simulates a multi-position switch using programming buttons. The circuit is from an...