I've been trying to build a 4 x 3 LED array using the following parts:
- 12 Blue (470nm) LUXEON Rebel LED on a SinkPAD-II 10mm Square Base - 70 lm @ 700mA
- heat sink for LEDs
- 12VDC, 1Amp Power adaptor
- 700mA BuckPuck AC Driver
- Arduino Uno R3
- 22 AWG wire, male-female interconnects, etc
The LEDs are mounted on a heat sink and wired in a 4x3 array (3 chains of 4 LEDs wired in parallel).
A schematic of the circuit can be found here: LED circuit schematic
I'm using PWM to control the brightness of the LEDs through pin 11 (not pin 13 as the circuit illustrates).
The circuit works; however, I'm certain the LEDs can be brighter, and for my application, they need to be brighter. Can anyone give me any advice as to how to modify this circuit in order to increase the brightness of the LEDs?