The ADC801 is not an easy component to obtain today, but the configuration is worth reference. The circuit is from National Semiconductor's Linear Applications Handbook.
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...