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LED Light for PrintrBot

by luckydad, published

LED Light for PrintrBot by luckydad Dec 31, 2012
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Simple LED Holder to mount two 5mm LEDs to shine down on the print bed of a PrintrBot LC


After mounting a 40mm fan to my PrintrBot LC, it was hard to see the printed item. I created this simple LED Holder to mount two 5mm LEDs to shine down on the print bed.

3D Printer
Soldering Iron
Heat Gun
Wire strippers
Screw Driver
Wire Cutters

Parts List:
(2) 5mm High-Brightness White LED (2-Pack), http://www.radioshack.com/product/index.jsp?productId=3060980
(1) Deans Micro Connector, http://www.rpphobby.com/product_p/wsd1222.htm
(1) 220 ohm 1/4W Resistor, http://www.radioshack.com/product/index.jsp?productId=2062340
(1) Power connector, i.e., Molex Power Cable (cut off the black connector), http://www.radioshack.com/product/index.jsp?productId=3780246

Shrink Tube

The LED Holder will fit snugly between the hex nuts on the PrintrBot LC and uses the existing #6-32 screws. Remove the two lower screws and washers, put the holder in the place of the washers and reinstall the two screws.

I used a Micro Deans connector as a disconnect at the print head.

The resistor value assumes connection to +12V and the specs of the RadioShack white LEDS (FW current: 25mA, FW supply: 3.3V). If you are using a different LED or power source, go here for a simple resistor calculator: http://led.linear1.org/led.wiz

I used a PC power connector to get the 12V to power the LEDs from one of the available connectors on the PC power supply.

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There must have been a change to the extruder design or something, but the holes on this do not match the Printrbot Plus (v2). The screws that this is supposed to mount on are much further apart, and lower. The good news is that there's still more than enough free space behind the extruder to mount it with small wood screws.

oh, it was no big. you didn't have to go to all that trouble. but thank you. so, how easy is it to do this. oh and what is powering your L.E.D.s?

This project is pretty easy for anyone with experience soldering and wiring. The LEDs are being powered off one of the available connectors on the PC power supply. One thing I failed to list was the power cable I used (I cut off the black connector and slpliced in some 2-cond. cable I had): http://www.radioshack.com/product/index.jsp?productId=3780246http://www.radioshack.com/prod...

So, in the picture, the thing your making isin't this L.E.D. holder, but it does appear to be an L.E.D. holder. Is my hypothesis correct? if so, is the one your making better than the one your using? If so what disigne is that?

Thugorp, sorry for the confusion. The thing in that picture was a fan mount. I just wanted to show how well the LEDs light up the work area. I have removed that pic so as not to confuse anyone else.