He uses telephone wire to connect each ... The base unit houses an Arduino board which polls the buttons to see which is pressed first. The LED on the appropriate buzzer box is illuminated so ...

Figure an Arduino most matches the "Other" category ... You could verify this with a DMM: Connect the buzzer to a DC supply with the DMM in series, set to a current range. Trying to directly ...

The Arduwire UNO is an innovative shield designed for the Arduino UNO development ... testing of multiple connections simultaneously. – Green LED Pass Indicator: A green LED lights up to ...