Help needed with flashing brake light microcontroller Answered
New here and hope you can help me out.
I am a biker in south africa and would like to put together an aditional brake light that flashed 4 times then go solid.
Microcontroller will most likely be the easiest and have design one as follows. (the coding has been done)
LED's to be used is 20mA at 2.2V
My concern is that for the amount of LED"S (100) i want to use 1amp is not enough and therefore i am using a LM7810 to drop the voltage from 12V to 5V with a cap to increase the 1A output to 5A
I wish to wire the LED's in parralel si if one pop's then it wont affect the rest of the LED's.
Must i therefore still wire a resistor in front of every LED? (180ohm?) or can i wire in this LED before the LED matrix to give it a 2.2-2.3V throughout the LED matrix?
Here is my design : http://i247.photobucket.com/albums/gg156/HannesNel/design_zps52f754cf.png
2nd EDIT :
How about this? reworked the design a bit?
Then i drop the 12v down to 2.5V needed for the LED's and no resistors needed?
I also opped for the LM350 due to the higher amps it can handle
Now using super bright LED's with a rating of 2V and therfore will use row of 6 in series to give 12V...still need resistors when connecting the 6 banks of 6 LED each in parralel?