KY-040 rotary encoder

KY-040 Rotary Encoder Module

Rotary encoders appear in controls from car-radio volume knobs to vacuum-cleaner settings. Measure rotation through an unlimited number of turns!

Rotary encoders, also called quadrature encoders, are practical mechanical rotation sensors. Unlike potentiometers, they can be turned continuously. 

KY-040 is an incremental mechanical rotary encoder with an integrated push button. Its two digital pulse channels let a microcontroller determine rotation direction and count steps, making it useful for electronic controls.

Our encoders are incremental: they do not store the number of steps turned. A microcontroller can keep track of this.

Pressing the shaft activates a centre push button, useful as an Enter action in menus.

Technical specifications

What's included?

• KY-040 rotary encoder

Warranty and shipping

We do our best to test all electronics before sending them to you. 
This helps us deliver reliable products and saves you unnecessary trouble during development. Faults can occur, although we encounter them very rarely. If you have a problem with the equipment you ordered, you can always contact us, and we'll gladly help you resolve it. 

We dispatch from Aarhus to Denmark and Sweden. Shipping options and prices are shown at checkout. Delivery time depends on availability, destination and shipping method; contact us before ordering if you need an item by a specific date.