Dimmerino – Inexpensive modular dimmer for Arduino.
Part 1 – Constant voltage mode power PCB for LED strips. (16 outputs), schematic + pcb.
Led cubes powered with 48 channels dimmerino. Video courtesy of Pal Events.
In this first part we present a pcb with 16 constant voltage outputs, suitable for controlling LED strips from one or more colors, with a consumption per output up to 2 amps (or more with cooling), can chain several of these PCBs for the channels we need.
This circuit uses a IC type TLC5940, receiving serial data from the Arduino and controls the amount of 16 outputs with pulse width modulation (PWM).
On outputs of TLC5940 have 16 mosfets which are operating the charge, these mosfets work in court and saturation, thereby reducing the heat dissipated.
The MOSFET can be of type BUZ10, BUZ11, IRF540, IRL540 and others.
Schematic pcb led:
Download PCB: dimmerino-power-board.pdf
In the next posts will show you how to connect this board to the Arduino, and software to make it work with DMX 512.