This circuit is the digital indicator for the previous circuit and can be used with similar circuits. The circuit is from an article in Radio Electronics magazine, June 1987.
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...