The primitive way to do it, is to simply mount small 5V reed relays instead of the contact plates. Then use the output from the Arduino to activate the relays.
(Reed relays are inductive loads, remember the diode)
The primitive way to do it, is to simply mount small 5V reed relays instead of the contact plates. Then use the output from the Arduino to activate the relays.
(Reed relays are inductive loads, remember the diode)