This circuit is one of many that can be found in this section using the 555. This circuit was found in old American documentation being applied to cars that use contact breaker.
This circuit is interesting for experiments and can be part of the bench in the form of a module. The...
Constant currents from 10 mA to 1 A can supply the load, depending on the selection made by S1. Q1...
In the figure we have the transmitter and the receiver for an optical audio link via infrared. The...