Where makers tell their tales and offer praise, brickbats, and swell ideas.

image I’m sure a thousand people have already mentioned this, but in MAKE 07, on page 17, the penny-powered LED, there’s a comment about older pennies working better, and it says you don’t know why. I don’t know the year offhand, but at some point the rising price of copper caused the mint to switch pennies to a copper-coated zinc core, instead of pure copper. Cut one in half, or more fun, hit one with a propane torch. By the way, unbelievably great magazine. Keep it up!

—Dave Schaum

I’ve been playing fangirl for MAKE. [My friend] and I met a 15-year-old at the ...

Get Make: Technology on Your Time Volume 08 now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.