# LED Flasher

#### skyler521

Joined Mar 14, 2008
2
I am trying to make a LED flasher that will flash a set of 6 LEDs on one side and then flash 6 LEDs on the other side. i want the first side to blink twice then the second side to blink twice. (left left right right LL RR LL RR). i have looked for this kind of circuit and made about 4 of them and none of them have worked properly.. the closest i got was a circuit that would just flash one time on each side.

I am using 10 mm LEDs that need about 4.5 volts to run properly...

#### timc4444

Joined Mar 13, 2008
5
I believe a PIC Controller is appropriate for this. There was a guy on You tube that made a arrowstick that he had programmed various patterns in.
posting the mesage he sent me below

The design is pretty simple.

The light is made up of 8 light heads. Each light head has 9 rows of 4 leds and resistors. So thats 288 amber leds and 72 resistors. The value of the resistors on my light is 10 ohms, but could be differnt for you, depending on your supply voltage and what kind of current your leds can handle.

The leds are just soldered onto pref board that is painted black.

The control uses a micro-controller to control the patterns. A PIC 16F628A in my case.

I used darlingtons to drive the light heads, as a micro-controller cannot handle the current the leds draw on its own.

A 7805 volatge regulator supplys the PIC with a constant 5v and a LM350 supplies the lights with a regulated 9 volts. The light works off anywhere from 12-15v so it can be used in a car.