- one halogen bulb (burnt or new since they are really cheap) with no glass cover on front.
- LED's - as many as you want. You may want to keep this number reasonable since more than 22 LED's will make you work painful.
- online acces to http://led.linear1.org/led.wiz
, a great LED array calculator you can use to figure out the resistors you'll need depending on your number of LED's and the supply voltage.
- Super Glue & compound glue. You can use other glue as well but super glue sticks fast and I recomend it.
- solder wire, moderate soldering skills, solder gun
- one small piece of 0.2mm aluminium sheet (this is used in printing industry, I work in this field and there are a lot of aluminium plates around here). Any offset printing shop will be kind enough to give you a used one since they use hundreds each month. A cut-out Coca-Cola can will do, once you straighten it.
- a paper perforator (office type, 2-hole punch)
resistors (depending on your needs)
- a few other common household items along with a good amount of patience.