Okay, I’m obviously sleep-deprived at this point, because this actually looks pretty cool to me. The picture pretty much explains everything: you snap a 9-volt onto this LED attachment, and ta-dah, ...

Drumroll please……. We are happy to announce that after much anticipation on the part of Inhabitat readers, Richart Lawson’s in-demand 9Volt Battery LED Lamp has ...

Here’s another hack that we would definitely discourage you from trying at home, 244 9 volt batteries wired in series. There’s really not much more to it than that, but [jersagfast] takes this setup ...

This is a very simple 9V low battery indicator circuit which has 2 LEDs, one green which will light up when the battery voltage is higher than 6.9 volts and one red LED which will light up when the ...

While it’s the easiest way to lay out a simple circuit for prototyping, breadboards are a pain. They are the ultimate kludge; they work well enough, but no one will ever say that a solderless ...