Found in American documentation from the 1980s, this circuit makes use of components of the time, which are uncommon today. The circuit detects the approach using a sensor formed by metal plates.
This circuit is a shield for microcontrollers and computers drivind high power loads. In the...
This circuit can measure voltages from 0 to 10 V with a very high input resistance. The circuit is...
This circuit uses a FET to drive an LED with constante currente. The current up to 20 mA can be...