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Here's how we constructed a wooden Christmas tree decoration with colour-changing LED lights.
You will need the following parts: - 1 piece of MDF (whatever size you want your tree - ours was about 70cm x 50cm) - Red, green and brown paint - Ho...
Draw a Christmas tree shape onto the MDF, including the trunk and a pot for it to stand in. You'll need the main part of the tree to be fairly solid ...
Now use your saw to cut out the tree outline. Try not to cut off your fingers as this will make the later steps more tricky. Remember to wear a face...
Next you need to mark the positions for the LED holes. We used 31 "paper holes" collected from the inside of a paper-punch to first decide the positi...
Here you can see my assistant drilling the holes. Note how he is holding the wood firmly to the bench, with his hand well away from the power-drill. ...
Next, draw on a "star" shape at the top. This needs to be a bit bigger than the holes for the colour-changing LEDs.
Drill a couple of holes inside the star shape, then use a small saw to cut out the rest of the shape. This is easiest if you have a jig-saw.
Now paint your tree. The green paint we used for this one was a bit thin - almost ink-like. For an earlier one we made we used a thicker paint, whic...
First, identify the anode and cathode on your LEDs. They have to be connected to the power supply the right way round or at best they won't work, and...
Put a LED into each hole, with all the resistors facing in the same direction. Now you need to connect all the resistor sides together using solid co...
Once all the wiring is done, get out your hot glue gun and glue everything into place. In the second picture here you can also see the fuse and fuse ...
Flip the tree over, and start filling the LED holes with glue, so that you end up with a little mound of glue poking out of each hole. The glue set...
Unless you use a _lot_ of glue, there will be some bare copper wires on the back, which could short out if they touch something conductive. To avoid ...
Check one last time that you've wired everything up correctly. Follow the positive wire from the socket to the positive side of each LED, making sure...
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