Note: this is dumb RGB version, if you are looking for smart pixel version, see my WS2811 driver

IMPORTANT: as of mid 2017, 20W LEDs look different (color order,) do not use color of LED chips as a guide, use + & - signs and mounting holes

This driver was designed to drive 20W RGB LED modules (LED is not included in the kit, available as option) using dumb LED controllers. Input signal can be inverted or non-inverted (selected with R7 & R8,) maximum input voltage is 5V. The board will fit into a standard 20W flood light enclosure. Requires 24V power supply. PCB comes partially assembled, all 4 SMD parts are soldered.

Power requirements

24V, 1A

BOM

• 3x PT4115 constant current buck driver (soldered)
• 1x 78L05 LDO
• 1x 74HC86 (soldered)
• 3x 100uH inductor, 6x8mm, 500ma
• 3x 1N5819 diode
• 3x 0.33R resistor
• 3x 4.7K resistor
• 1x 0.33R or 0R resistor (R7 or R8)
• 1x 47uF/50V capacitor
• 1x 0.1uF capacitor