This circuit was found in a 90’s Electronic Design. The circuit uses components that are still common in the market and indicated for use in the car.
We have in the figure a traditional amplifier configuration with operational amplifier. The source...
This circuit can be used to test crystals from 1 to 20 MHz and also has an output to measure their...
Using a single Darlington phototransistor, this circuit drives a highly sensitive relay, for...