My first time wiring a basic parallel LED circuit------from literally garbage parts. I.e. a bag of about 5,000 small resistors discarded / given to me by an old HAMradio elmer, wires taken from a on old

3D-printing these in PLA was of course incredibly rough on the gums, even after sanding. The held up just fine strength-wise.....until I put them in my coat pocket for an hour. Using them OTHERWISE didn't

That mask has got to be among the best $17 I ever spent. 😁 I added the LED lights using a $1 two-AA battery pack pre-assembled with a short strand of 10 orange LED lights, which I taped together in two