MOD-RGB : UEXT module to control RGB strip leds

Control RGB/RVB LED strip via I2C bus

MOD-RGB is a completely open-source module suitable for controlling LED strips. The module have a microcontroler that autonomous generates PWM signal controling the power mosfet.   

You can connect 3 LED strips of the same color and control the luminosity of the LED. You can also connect a RGB / RVB LED strips and PWM signal is then used to control the color mixing by dosing the quantity of red, green and blue color.

The board can be controlled via I2C (UEXT connector) or DMX interfaces. The board has short-circuit protection and can provide up to 5A to each strip channel.

Olimex provides examples for interfacing MOD-RGB with Arduino base code. A code portage has been done for MicroPython.

Technical details

• Based on PIC16F1503
• Custom firmware for easier use via I2C or DMX
• 3 channels with overcurrent protection
• Nominal amperage for each channel - 5A
• LEDs are controlled with output PWM @ 1KHz
• Stereo audio-in jack
• ICSP pads for uploading custom firmware
• Convenient PTH jumper for DMX/I2C mode switch
• Convenient PTH jumper for UEXT powering of device boards
• UEXT to connect to device or host microcontroller
• Dimensions: 62.0 x 35.5 mm

Hardware specifications

• MOD-RGB schematic in .pdf format
• MOD-RGB schematic and board design in Eagle format
• MOD-RGB dimensions .pdf format

Software specification

• Firmware V3 binary, source and explanation
• Arduino examples and library for MOD-RGB with firmware V3
• Older demo projects, customer demo projects and more might be found at the wiki page: MOD-RGB article