Found in a 1965 Electronic Design, this circuit makes it possible to select signals with an inverted phase using a relay and a unit gain stage.
The purpose of this simple configuration, found in old documentation, is to trigger a buzzer if...
This amplifier uses the LM358, this operational amplifier with excelents characteristics for this...
Found in a 90s Electronic Design, this circuit can be used as a shield in current projects. The...