DIY Brake lights

again , wonderful info as usual from DRCCENTRAL

credited to tvouthilak of DRC central

PS: can some1 good with electronics help me with it????

enjoy

*DISCLAIMER- I will not be held responsible for any damages made to the ESC, receiver, motor or any part of your car or yourself due to the making and using of this device.*

Parts:

-Red LEDs and LED holders
-Relay- I used a 5VDC SPDT micro relay from RadioShack #275-240
-Power source- I’m using (3) 1.5v button cells.
-Switch (if not included with power source). My power source has it’s own on/off switch.
-Wire

Tools:

-Wire cutter
-Soldering iron and solder
-Electrical tape

. Please refer to the diagram. Your relay may be set up differently depending on what relay you are using, but this should help you see how the parts go together.

This will not be a step by step tutorial, because the diagram is pretty much all you need. I will however try to explain how the diagram works.

Before we get started I would like to mention that the pins on my relay are very small so soldering was a bit tough. If you can find pin connecters small enough to fit on the pins, then go right ahead and use connecters. However, I think soldering makes for more of a secure connection.

Time to get started.

Pins 1 and 3 make a closed loop when no power (Car in STOP position) is sensed by the coil (pins 4 and 5). So wire the LEDs and the power source in series from pin 1 to pin 3.
Remember to wire in a switch between your power source and the LEDs if your power source doesn’t have a switch.

If wired correctly, the LEDs should turn on when you switch your power source on.

Ok, congratulate yourself if you’ve made it this far. Guess what, you’re half way done!

Now test if the relay is working. First solder some wires to the coil (pins 4 and 5) then grab your 7.2v battery pack (yes, the one that powers your car). Make sure your LEDs are on and touch the wires from the coil to the battery. You should hear a click (this is the sound of the relay switching from the “Closed” position to the “Open” position) and your LEDs should go off (car in GO position).

If successful, alls you have to do now is connect the wires from the coil (pins 4 and 5) to the output wires of your ESC going to the motor.

Now give it a try. Power up your car, turn the brake lights on and give her some gas. The lights should go off when you pull the throttle and come back on when you release the throttle.