This circuit is from 2005 documentation. The integrated amplifier circuit must be mounted on a good heat sink and the speaker must be able to withstand the full power of the circuit.
This circuit was obtained in an old American documentation, remembering that the 566 is the double...
At each touch of the sensor this counter based on circuit 4017 advances one LED. The circuit can be...
This circuit was obtained in a 1991 Electronics Handbook. The publication no longer exists, but...