Rotary Encoder

An EC11-type rotary encoder with a push switch in its shaft, its pull-ups, filter capacitors and pull-down already fitted. Two contacts a quarter of a cycle apart give the direction; the program keeps the count. Pushed in, BTN reads HIGH.

Pull-ups

10kΩ on CLOCK and DATA

Filter

1ms, 10 kΩ and 100 nF

VCC

3.3or 5 V, to match your board

Wires

5GND, VCC, BTN, CLOCK, DATA

Turn it over and see which five holes to wire: GND, VCC, BTN, CLOCK and DATA. CLOCK and DATA rest HIGH, BTN reads HIGH when you push the shaft, and VCC sets all three levels.

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