---
product_id: 166224637
title: "Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino"
brand: "kuqiwu"
price: "FREE"
currency: EUR
in_stock: false
category: "Kitchen"
url: https://www.desertcart.gr/products/166224637-kuqiwu-motion-sensor-ldtr-0021-rotary-encode-module-for-arduino
store_origin: GR
region: Greece
---

# Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino

**Brand:** kuqiwu
**Price:** FREE
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino by kuqiwu
- **How much does it cost?** FREE with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/166224637-kuqiwu-motion-sensor-ldtr-0021-rotary-encode-module-for-arduino)

## Best For

- kuqiwu enthusiasts

## Why This Product

- Trusted kuqiwu brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Rotation of the rotary encoder may be counted by the positive rotation direction and a reverse direction pulse frequency output during rotation potentiometer not count this rotation count is not limited. With buttons on the rotary encoder can be reset to the initial state, that starts counting from 0. How it works: The incremental encoder is a series of numbers is converted to rotational displacement of the rotary pulse signal sensor, these pulses are used to control the angular displacement, the angular displacement encoder Eltra of photoelectric conversion using a scanning principle. Reading system to rotate the radial indexing plate ( disc) by alternating transparent and opaque windows windows constitute the basis, while the vertical irradiation by an infrared light source, the light of the projected image encoder to a receiver surface, the receiver is covered with a layer of a diffraction grating, and a code plate having the same window width. The receiver's job is to feel changes produced by rotation of the disc, and then converts the light into a corresponding change in the electrical change, and then make up to the higher level signal is low, and there is no interference generated square pulses, which must be electronic circuit to deal with. Reading systems typically employ differential mode, but as soon the two waveforms for different signal phase by 180 degrees compared in order to improve the quality and stability of the output signal, the reading is then formed on the basis of the difference between the two signals, thereby eliminating interference. Incremental encoders give two-phase square wave, the phase difference are 90 degrees, usually called the A and B channels. Wherein the rotational speed of a channel-related information is given, while the two-channel signal by comparing sequence information obtained in the rotation direction. There is a special signal called the Z or zero channel, which gives the absolute encoder zero, this signal is a square

## Features

- Color White + Black
- Model LDTR-0021
- Quantity 1 Piece
- Material FR4
- Application The rotary encoder can count the pulse outputting times during the process of its rotation in positive and reverse direction by rotating. This rotating counting is unlimited, not like potential counting. It can be restored to initial state to count from 0 with the button on rotary encoder.

## Images

![Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino - Image 1](https://images-na.ssl-images-amazon.com/images/I/41fvWVvyCHL.jpg)
![Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino - Image 2](https://images-na.ssl-images-amazon.com/images/I/41aoQjRWoBL.jpg)
![Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino - Image 3](https://images-na.ssl-images-amazon.com/images/I/41gqF17kjnL.jpg)
![Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino - Image 4](https://images-na.ssl-images-amazon.com/images/I/416k%2BRElPrL.jpg)
![Kuqiwu Motion sensor LDTR-0021 Rotary Encode Module For Arduino - Image 5](https://images-na.ssl-images-amazon.com/images/I/41TT9HAEBCL.jpg)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.gr/products/166224637-kuqiwu-motion-sensor-ldtr-0021-rotary-encode-module-for-arduino](https://www.desertcart.gr/products/166224637-kuqiwu-motion-sensor-ldtr-0021-rotary-encode-module-for-arduino)

---

*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-04-24*