We found this circuit in an Australian publication from 1991. It is a kit of the time with input for a guitar pickup. The range is a few tens of meters.
This circuit, obtained in a 1983 magazine, can drive loads up to 100 mA if the transistors are...
This two-input limit detector was found in an American 1980s documentation. The circuit can be...
This circuit of an Electronics Now from the 90's produces an intelligent direction signal that has...