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G3 Made Simple

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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.

Parts used (source)

Pololu 1210 radio controlled digital switch with MOSFET output (www.active-robots.com)

Reed relay single pole / single-throw 5 volt  (Maplin part no. JH12N)

Servo lead to connect to R/C RX unit (www.active-robots.com  part No. 86230)

NOTE : Pololu 1210 has been superseded by 2802

Parts used (source)

Pololu 1210 radio controlled digital switch with MOSFET output (www.active-robots.com)

Miniature relay, double pole double throw, 5 volt (www.active-robots.com  part No. RE1)

16-pin DIP socket (to mount relay) (www.active-robots.com  part No. DC-16 PIN)

Servo lead to connect to R/C RX unit (www.active-robots.com  part No. 86230)

NOTE : Pololu 1210 has been superseded by 2802

 

 

Required for all projects : Veroboard (pierced stripboard with parallel copper tracks).

DIGITAL SWITCHES

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.

Parts list (source)

Digital Switch ARCS2 (www.andyquirot.co/sales/radio-control-switch/ )

Miniature relay, double pole double throw, 5 volt (www.active-robots.com  part No. RE1)

16-pin DIP socket (to mount relay) (www.active-robots.com  part No. DC-16 PIN)

Capacitor 0.1microFarad

Diode type 1N914

Voltage Regulator type LM7805

 

RAILCAR HEADLAMP/TAIL LAMP REGULATOR