This circuit is from a 1966 Motorola Field Effect Transistors Manual. The circuit makes use of other components from the time. Modern equivalents can be tested.
This is the traditional sequence of 10 reverse LED sequences, that is, the LED goes out in...
This circuit is in the SGS manual of linear integrated circuits of 1982. The integrated circuit is of...
With the circuit shown, you can have a fast response with a Darlington configuration. The circuit is...