Hi all !
(this is my first post here)
I've bought an 5m RGB led strip and an Arduino duemilanove to control it.
It's not clearly described if it's a common anode/cathode :( Maybe "positive light" is a hint...
LED quantity: 5 M in a roll of 300 LEDs ( SMD 5050 )
Type: Epoxy Waterproof positive light
Power: 72 W
Voltage: DC 12V
What I would like to do is to decorate my kitchen with 2 ~60cm chunks (approx 60 leds each). I'll use PWM and some transistors to control leds.
I've done calculations:
72W / 12 V = 6A (for the whole strip) 6A / 300 led = 0.02 A/led = 20mA/led 66 led * 20mA = 1.32 A
I've saw on other threads that someone used an ULN2003A (which will be good as there are 7 transistors inside) but it seems to handle only 500mA :'(
Could someone help me to find the good transistor : - if I want to control the whole strip (6A) - if I want to control 2 chunks of 60cm