Found in an ancient American documentation, this circuit can generate signals up to 40 MHz for a Z80, microcontroller widely used at the time. The circuit must be powered with 5 V and also serves as a shield.
This simple CMOS touch switch was obtained in a 1987 publication. All components are common and the...
This directed coupled amplifier uses a transformer to drive a low impedance loudspeaker. This...
A negative pulse applied to the input of the circuit shown in figure bellow turns on the relay....