KY-040 Rotary Encoder Module

A compact incremental rotary encoder module with quadrature CLK and DT outputs plus an integrated momentary push switch. The five-pin interface exposes CLK, DT, SW, supply, and ground for breadboard-friendly user input.

VCC
Logic supply. Use 3.3V with 3.3V microcontrollers.
Type · powerVoltage · 3.3
GND
Ground reference.
Type · ground
CLK
Quadrature encoder channel A.
Type · digital
DT
Quadrature encoder channel B.
Type · digital
SW
Integrated momentary push switch output.
Type · digital

Pin	Type	Function	Voltage
VCC	power	Logic supply. Use 3.3V with 3.3V microcontrollers.	3.3
GND	ground	Ground reference.
CLK	digital	Quadrature encoder channel A.
DT	digital	Quadrature encoder channel B.
SW	digital	Integrated momentary push switch output.

Passives

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