This circuit uses a lamp driven by the Hertz loop and measures its brightness with ordinary photovoltaic cells. The circuit is from a Radio Electronics from February 1964.
High quality sound can be obtained from this transistor amplifier. The output transistors must be...
This is a conventional triac dimmer configuration found in a 1986 documentation. The triac used is a...
With the use of a cascade transistor, the dynamic response of a phototransistor can be increased, as...