This circuit is from 1999 documentation. The integrated circuit used is not very common today. Both transistors are used if the motor current is greater than 500 mA.
Found in a 1968 American documentation, this circuit generates 1 kHz signals. The SCR used is not a...
This circuit with bass and treble control and 10 W of power per channel is from the SGS manual of...
More modern operational amplifiers can be used on this instrument to measure alternating voltages. The...