roller switch

The roller switch is a handy Bit -- it has a little lever with a wheel, and activates when something moves past it. You can also flip the mode switch to make it turn off when the lever is pushed in. Try that mode with an LED to make a fridge light.
$9.95
Users
Ages 8+
Grades 3+
Sizes
Height 0.5"
Width 3.75"
Length 7.5"
Weight
0.01 kg/ 0.02 lbs
Model No.
650-0019
UPC
859477003898