Lighting requirements for three-wheeled vehicles in Australia are specified in ADR 67.
The front of the car must have:
- two dipped beam headlamps, which must be within 400 mm of the edge of the car, not less than 500 mm above the ground, and must be visible 45° to the left and right, 15° upwards and 10° downwards
- two main beam headlamps, which may be no closer to the edge of the car than the dipped beam headlamps, and must be visible at angles not less than 5°
- two front direction indicators, within 400mm of the edge of the car, and at least 350mm above the ground
- two repeating side direction indicators
- two white position lamps, which must be within 400mm of the edge of the car and at least 350mm above the ground.
The UniSA prototype used the following lamps, donated by Hella:
|Hella part||power (W)|
|2||1030||main beam and position||55 + 4|
|2||side direction indicators||5|
12 V LED front indicators were not available when the UniSA prototype car was built, and so orange incandescent indicator lamps were used instead. The prototype car was fitted with LED side direction indicators.
The Mitsubishi i-MiEV electric car has LED headlights.
The rear of the car must have:
- two direction indicators, mounted within 400 mm of the outer edge of the car, at least 240 mm apart and at least 350 mm above the ground
- a single stop lamp, mounted centrally at least 350 mm above the ground (check this—the UniSA prototype used two stop lamps)
- two position lamps, mounted within 400 mm of the outer edge of the car, at least 400 mm apart, and at least 350 mm above the ground
- two red reflectors, mounted within 400 mm of the outer edge of the car, at least 400 mm apart, and at least 350 mm and no more than 900 mm above the ground
- one or two reversing lamps, mounted at least 250 mm above the ground
- registration plate lamps sufficient to illuminate the plate; the centre of the plate must be not less than 300 mm above the ground.
An eye-level brake light is also required.
The UniSA prototype used the following parts:
|Hella part||power (W)|
|2||2390||stop, position lamp||5, 1|
|2||2559||number plate lamps||0.7|
Trev has three lighting controllers, one for each side at the front and one for the rear. The lighting controllers are identical, but the lamps (and other devices) connected to each of them are different. Each controller can switch eight circuits:
|position lamps||Y||Y||8||front is incandescent, rear includes number-plate lamps|
|left indicator||Y||Y||26||incandescent front and side lamps|
|right indicator||Y||Y||26||incandescent front and side lamps|
|dipped beam headlamps||Y||110|
|main beam headlamps||Y||110|
The lighting controllers are custom built. A microcontroller responds to CAN messages by switching circuits on and off. Indicator flashing is controlled by the lighting controller software. Most circuits used MOSFETs for switching.
Combined LED lamps, such as brake and tail lamps, often use a common negative, so the lighting controllers should switch the positive sides of each lamp.