Based on a PLL 567, this circuit serves as a receiver for the CB9574E circuit. S tuning is done in R1 and it is used for frequency modulated signals.
This balance indicator for stereo amplifiers was found in an 80's Elektor. The components used are...
In the figure we have the way to control a TIC series triac with a reed switch. The current in the...
This source provides a 1.5V voltage used in the power supply of model aircraft spark plugs. The...