Found in a Popular Electronics from the 90s, this circuit uses common components with several operational options, including the use of an optocoupler that allows its application in a shield.
June 2017 - Mouser Electronics already has the new Vishay DG series analog switches in stock. The...
This circuit is from an 80's documentation. The circuit makes use of a component of the era, the...
This circuit provides a reference voltage for calibration. He uses a diode in a small thermal...