There are a few parts necessary, but all of them are pretty easy to get.
Part Name Use Cost Where to Find Halogen Lamp light src $6 Lighting store/Online MR-11 Socket for lamp $6 Lighting store/Online Halogen Torchiere housing $0 In trash Solid Core/Stranded Wire Wiring circuitry & Battery $0-$5 Phone wire and thin stereo hookup is fine Perfboard circuit substrate $4 RadioShack, etc LiIon Battery power src $20-$60 EBay, electronics store
The rest are electronic components, all available from DigiKey.
Part Name Part Number Cost (each) Rail-to-rail opamp LMC6482IN-ND $2.05 Power P-FET IRF9Z30-ND $1.28 5.1 Zener 1N5231BDICT-ND $0.36 10K Pot w/Switch 270X232A103B1B1 $3.48 0.1ohm 1/2W sense resistor* 605HR100-ND $0.42 Mini Banana plugs J457-ND $1.42 DC Jack (for battery connection) CP-102A-ND $0.38 DC Plug (for battery connection) CP-002A-ND $0.38 Various resistors Search website $0.10

* If you're using a 10W or less bulb, 1/2W is ok. Otherwise, 1W is best.

This guide was first published on Apr 21, 2013. It was last updated on Apr 21, 2013.

This page (Parts) was last updated on May 25, 2020.

Text editor powered by tinymce.