This 10 A solid state relay was found in a 1980s documentation. It can work as a shield and implemented with modern equivalent transistors.
This circuit was found in a 1980s telecommunications publication. The circuit uses a diode bridge to...
Audio frequencies in the 300 Hz to 30 kHz range can be measured with this circuit. Transistors allow...
Indicated to be used as a clock, this circuit was found in old documentation. The operational of...