Old time we used wave the checkered flag to competitor and give the start signal.But now we using wireless control light system.Even we can do any night race events.and no any confusing or any error when using light system for race start.and when using wireless its so easy.
Step 1: Collect all the items you need
One round Light has 92Led's.
RED Led's = 92 x 4
Green Led's = 92 x 4
220Ohm 1/4W resistors = 44 x 4
433Mhz 4 channel wireless remote control module - bought from ebay.
Wires,Soldering iron,and solder wires.
Nut and bolts.
Solder and finish the PCB's