The circuit uses operations that are no longer common nowadays, as it is a configuration obtained in the Linear Applications Handbook of the National Semiconductor of 1994.
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...