Found in a 1968 EEE, this switch controls a high-power load from an audio signal. The current is determined by the type of SCR.
In the figure we have a monostable that is activated with switch S1 and pressed for an instant. The...
This complementary-output amplifier can be used to source a good qualuty signal to high impedance...
The figure shows how to use the LM3914 bargraph with expanded scale. The circuit has two...