These are simple to build digital switches which enable the radio control of auxiliary
circuits on locomotives, carriages, etc.
They were devised by John Candy for use with MyLocoSound steam and diesel sound cards
but can be used for switching lights and other functions within the load capabilities
of the miniature relays employed.
1) Whistle Switch is a simple switch employing a reed relay and used for activating
the “whistle” or diesel horn function (or the bell on a US loco.) the contact is
made and the whistle will sound for as long as the radio control stick is held in
the “on” position.
2) Chuff Switch is a switch which cuts the chuffing sound to simulate the “regulator”
closed condition but allows the “steam hiss” sound to continue while the loco is
coasting (for a diesel it cuts the engine “roar” back to “idle” while coasting).
The switch is activated for as long as the radio control stick is held in the “regulator
closed” position and requires a separate R/C channel from the speed/direction control.
NOTE: The latest versions of the MyLocoSound steam card has a built-in “coast” function.
Required for all projects : Veroboard (pierced stripboard with parallel copper tracks).
3) Headcode & Tail Lamp Switch for railcars enables radio control (using a single
channel) to set the lighting to four different combinations according to direction
of travel and “parked” situations. Toggling the transmitter stalk either side of
“neutral” position selects the lighting pattern.