Mysterious Lightbulb Prank

Step 5 Wire it up...

After zip tying both batteries together, solder one wire to the lightbulb base in the center. Solder one wire to the edge of the base. There should be two nice globs of solder already there that you can use. Then solder one wire to each of the LED leads. Take note as to which one is positive (the longer lead). Then attach the positive wire to the + side of the battery pack by slipping it under the zip tie. Do the same for the negative wire.

Comments

[fishfryer]

there isn't much solder on my base and i can't get more to stick. help please?

[Ugifer]

This will be way too late, but the flux paste used for plumbing will nearly always allow your solder to stick to metal that doesn't want to take it. Cleaning the metal with some abrasive paper or wire wool also helps.

[fishfryer]

it's never too late to build random stuff! I'll try this out, but even if it doesn't work, thanks anyway!