So last year, inspired by the many “How-tos” on HalloweenForum, my wife and I built a graveyard fence. As much as we loved the fence, I felt it was missing something. I bought a bunch of small battery operated pumpkins hoping to figure out a way string them up using LEDs and then put them on the fence posts to the graveyard, but never got it to work quite right.
Fast foward to this year. So there I was, staring mindlessly in the plumbing section for hours at Lowes trying to figure out a way to attach pumpkins to my posts. And then…”lightbulb.” The best part about this setup there is no annoying bulb in the middle, just a “glow”
- 1 superbright 5mm LED
- 130 ohm 1/8 watt resistor (radio shack)
- heat shrink
- snap in panel mount LED holders (radio shack)
- 24 gauge speaker wire
- .015 silver solder
- soldering gun, ( I used butane gun from Radio Shack)
- glue gun
- 2” test cap
- 3” test cap
- 2” pvc post
- power supply
This gap that the 2 test caps have will create the glow effect. Now hot glue the 2″ cap to the 3″ cap. You will have to eyeball this part and get it centered as best you can.
I bought a bunch of superbright LEDs from monsterguts.com. I used this calculator for the correct resisitor,http://led.linear1.org/led.wiz, We tried red, blue, green, and amber, and liked amber the best. I’m using a computer power supply so I used the 5v coming out instead of the 12v. Solder your resistor to the negitive side. I used a 100 ohm resister not a 130 resister simply because Radio Shack didn’t have any. Going over or under the resistor’s value a LITTLE bit will work but every LED is different.
Always buy 20 % more LEDs then reqired because 1. you’re bound to burn up a few and 2. it’ll make you feel better knowing your shipping costs were a little justified. Same goes for resistors. Anyway, Solder your resistor to the negitive side. Don’t forget to slide the heat shrink over your wires BEFORE you connect and solder your wires. (been there, done that)
Everything now should be ready to hook up. insert the LED. You could hot glue it but there really shouldn’t be a need to. Route your wire through the post and connect to the power supply of your choice.