This circuit monitors the output of a stereo amplifier, checking the balance and balance between the channels. The circuit is from American documentation from the 70s.
This circuit covers 400 kHz to 40 MHz in three bands according to the selected coil. The double...
Two sensors are used in this simple remote-control circuit, one to switch on and one to switch off the...
This circuit is from the Motorola Linear Databook published in 1990. The circuit for 1 kHz can be...