Scanner Rgb Led Lamp Pwm Controlled by Arduino Nano

Recycled scanner rgb led lamp pwm controlled by Arduino Nano

This is what you get if you follow this instructable.

Look for a broken hp all in one printer. (Other brands can also have the parts, but I used hp)

Try to find a relatively new model. The older ones sometimes have a CCFL lamp instead of LED lamp.

Look for this part in the scan unit of the printer.

Remove the motor part

Remove the solder from the 4 pins.

Be sure all the pins are completely detached from the pcb.

Put a screwdriver under the pcb (start at the opposite side of the desoldered pins) and pull the two pieces gently apart.

The pcb is now removed.

Turn the black plastic part upside down, and now you can remove the led lamp.

A screwdriver can be a useful.

The actual led lamp is the small part with the 4 legs. The long white extension is a kind of prism light diffuser.

It's a common anode led (shared positive pin)

Pinout from top to bottom (if you hold the led as in my picture):

Green, Red, Blue, common anode

Connect the led as in the picture.

I don't know the exact specifications of this led, so I used resistor values slightly higher than probably necessary.

Resistors:

red: 200 Ohm

Green and blue: 150 Ohm

Upload the code to get the same effect as in my video

Or customize it to your liking.