This circuit has tone control, and its power depends on the supply voltage. The circuit is from the Philips integrated circuits manual from 1990.
We found this circuit in an old documentation from the 70s. The sensor is an LDR that must be...
This low noise audio amplifier stage uses only one transistor and has a high enough gain to...
In fact, the 556 consists of a double 555, which can be replaced by these integrated ones. The...