This circuit from Radio Electronics from February 1983 shows how to use a clock radio in home appliance control. The circuit uses Triacs and TTL logic.
This circuit converts BCD inputs to analog voltages. The operational amplifier must be powered...
This circuit is suitable for the calibration of old analog oscilloscopes. It was found in...
This is the circuit of a hearing aid amplifier manufactured by Sony in the 1960s. The circuit was...