a convenient push-on push-off button switch to turn your LEDs on and off
This is another way to run your 3 volt LEDs. This 3 volt output AAA holder can run chips, 1.8mm, 3mm, 5mm or a mix of all sizes at once. And it can run more lights for longer than a coin cell holder/coin cell.
the LEDs are connected red wire to red lead. And black-to-black. Protect connections with tape or shrink tube.
In our tests, the AAA holder can run 20 LEDs more than the cr2032 coin cell holder.