I wanted to add lighting to my slot car track, but since I often use the track for club racing where crashed cars are grabbed up and put back on as quickly as possible, having a bunch of light poles around the track would just be in the way most of the time. As such, I needed them to be easily removable. I devised a simple solution using phono plugs and jacks. This allows them to be easily plugged in and out, and also rotated to disperse the light as efficiently as possible.
Following along with the photos…
- First photo showing all the parts needed, including a strip of the LEDs with six LEDs, male and female phono plugs with screw terminals, and a short length of wire, at least 220mm long.
- Strip no more than 10mm from one end of the wire, and solder to the center of the LED strip. Test your strip before hand to make sure soldering to the center will light both sides. Keep track of which wire is positive! Tips for soldering to the LED strip:
- Liquid flux is your hero! A single drop on each contact point, then put a drop of solder on your iron and touch it to the contact point long enough for the solder to move to the contact off the iron, then pull away and let it cool.
- Tin the tip of the wire as well and put a short 90 degree bend at the tip of the wire so that the rest of the wire is perpendicular to the LED strip.
- Connecting the wire to the strip should be quick and easy, just try to do it so that the wire is as close to the center of the LED strip as possible.
- Insert the wire through the pole, into the end with notches, so that it comes out the other end that is flat. Make sure the LED strip is pressed against the top of the pole. The notches are to allow a little room for wires/solder. Trim the wire so that about 10mm sticks out the bottom of the pole.
- Remove the wire from the pole, strip 10mm off the end, and re-insert the wire through the pole. Be sure to put on the post base prior to the next step!
- Attach one of the phono plugs to the wire coming out of the bottom of the pole. It doesn't really matter which plug you use, but I prefer the female for the pole, as it's easier to clean the male plug of debris should it sit unused on your track for a while.
- Remove the backing from the 12v LED strip, and apply a small amount of Shoe-Goo, or similar, to the top of the post, between it and the top of the LED strip. Then, press the top of the pole and LED strip into the light cover print, using a blunt object to press the LED strip down so that the adhesive sticks to the print.
- Get the Connector piece, and insert the phono plug into it as shown. Using your favorite glue, apply a small amount to the top of the Connector, or the bottom of the post base, and force them together. It's a snug fit, so some force may be necessary.
- The light post is done! Now, prepare the base parts.
- Insert the other phono plug into the base as shown.
- At your track, it might be easier to install the phono plug after wiring it into your power supply. This is why the base has a cap to hold the wire and phono plugs in place. The entire thing can easily be removed, if necessary.
Most parts can be printed with default settings for whatever material you use. I recommend the base be printed with 100% infill to add weight to stabilize it.