In our September 2010 issue, author Bob Kingsnorth explained how to control turnouts with momentary switches from more than one location. This diagram shows how to wire the circuit. Rick Johnson ...

Most remote controls provide ample momentary closures for a command, but there are times when a maintained closure is needed. This circuit requires a momentary closure for the on command and momentary ...

Control a relay (or three!) using a single ATTiny. Connect a switch between switch in and ground and then connect your relay to one of the three relay pins. No need for an external pull up resistor ...