Who would’ve thought a cheap AliExpress emergency light could be packed with such crafty design choices? Found for about $5, this unit uses simple components ... a smart circuit that defies ...

It's a simple string of miniature light bulbs ... but not all. The other type of circuit light strands use is a parallel circuit. In this setup, each bulb is on its own circuit to the power ...

Mwaksy and Greg construct a simple circuit that uses cells ... have in the classroom or at home that uses a battery? Does it light up, make a noise, or move? Does it do something else?