To power an LED strip you can use a MOPSFET driver.
My LEDs seems not to bright enough and I dont know why ! No matter resistor I put, my leds bright same way. My power supply is 12v 2A (I tried with 12v 6A and that's same result). I plugged my voltmeter to check if it delivers 12v.
My transistor is TIP120
I am using Blink example to make shine my LEDs
I solved my problem. I put a wire between emitter to negative pole on my breadboard (from power supply) then a wire between negative pole to gnd (from Arduino). Now it's shinning like Las Vegas
How many LEDs can shine with my TIP120 ? Which transistor should I have ? I need one TIP120 per digit ? (7 segments = 42 Leds) So I need 5 TIP120 to build my scoreBoard. then 5 * 42Leds = 210 Leds. Can I make shine these all LEDs ?
...my IR range is barely 1 meter.. How can I increase that ? I have to increase emitter or receiver ? both ? How does it works on my tv ? (on my tv, my remote control have a strong signal)