How’s it going with your project for the coin cell challenge? You can only use a ... or even four. [Jeremy] is building a wireless Wii nunchuk, so he needs a small battery that won’t short ...

This brings up challenge number one — the fact that ... Same deal with the giant half-dollar and smaller dollar coins. The basic sub-build is a pair of tile rails on which the coins slide ...

"Challenge coins" are little custom-made tokens used by military and police to commemorate campaigns and build team spirit. Most of them are innocuous, some are kind of silly, but many of them ...