Found in an Electronic Design from the 90's, this circuit measures the equivalent resistance in series of a resistor. The circuit operates at 50 kHz producing a rectangular signal.
This gun-like sound effects circuit is based on the PLL4066. The circuit was found in the December...
Two operational are used on this triangular-rectangular oscillator suggested by Motorola in its...
This circuit works directly connected to the network and special care must be taken with its...