This is a 12v LED spotlight which is used to supplement the led strip lighting above my desk.

Although the led strip light under the shelving provides a pleasant ambient light, I occasionally need a brighter lamp for reading or taking measurements. I do realise it would have been a lot cheaper and less time consuming to go out and buy a lamp, but, where is the fun in that!

Disclaimer.

Please note use only 12V ( or lower ) LEDs.

12V Halogen bulbs will generate significant amounts of heat and are not suitable.

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Parts

4W 12 Volt LED MR16 light bulb

http://www.amazon.co.uk/gp/product/B004MA1WB0/ref=oh_details_o01_s00_i00

Rocker switch – sorry no part number, it was one I had lying around.

Chocolate block terminal connector – the metal inserts measure 10mm long by 4mm wide by 5mm high. The block has a pitch of 8 mm.

1 in-line fuse holder.

1 1 amp fuse

3 m3x12mm screws.

3 m3 nuts.

1 m4x12mm screw.

1 m4 bolt.

Wire, solder etc.

Instructions

Parts were printed on rep2 with replicatorg0040 and using the profiles supplied by whpthomas.

http://www.thingiverse.com/thing:39050

Use wire cutters to extract the metal inserts from the terminal connector.

The MR16 light fitting connector has a pitch of 5.3 mm. Print the MR16 connector ( I used 100um profile for this part, everything else printed with the 200 um profile), and insert the metal connectors. Use your new connector to attach your wires to the bulb.

Clamp the bulb into the holder with the clamp and the three m3 screws and nuts.

I also printed a small switch box so I could attach it to my monitor with double sided tape.