More about power supplies (354)

1-03-1976 | Most tuners with varicap front-ends require two supply voltages. One for the front-end and i.f. amplifier {usually about +12 V) and a t...

1-07-1975 | Many different methods are followed to generate mains synchronised pulses. This circuit employs an opto-coupler to give complete isolatio...

1-07-1975 | Many pocket calculators have a constant factor memory. If a 1 is stored in this memory, depressing the t key adds l to the number al...

1-07-1975 | Many amplifier designs, both do-it- yourself efforts and commercial cir- cuits, have the bad habit of delivering a more or less hefty switc...