This low noise microphone preamplifier circuit was found in American documentation from the 90s. The circuit requires special care with the layout. The power can be between 9 and 18 V.
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...