Hall Effect Sensor

An omnipolar Hall switch on a TinkerBlock board: bring either pole of a magnet near and SIGNAL goes LOW and a red light comes on. No contact to wear out, it works through plastic, and it looks at the field every 22 ms, so it is made for doors, lids and slow wheels.

Switches at

40gauss, either pole

Output

active lowa magnet reads LOW

Looks every

22ms, so not for fast wheels

VCC

3.3or 5 V, to match your board

Turn it over and see the three holes to wire: GND, VCC and SIGNAL. With no magnet SIGNAL sits at VCC, so match VCC to your board. The sensing chip is the small part at the top left.

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