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126 lines
4.6 KiB
Markdown
126 lines
4.6 KiB
Markdown
# LIGHT
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<el-tag effect="plain">SKU:U021</el-tag>
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<div class="product_pic"><img src="assets/img/product_pics/unit/light/unit_light_01.webp"></div>
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## Description
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**LIGHT** is a light intensity sensor unit with an adjustable photoresistor。
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A photoresistor is a light-controlled variable resistor. The resistance of a photoresistor decreases with increasing incident light intensity and vice versa.
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The sensor exhibits photoconductivity which make it possible to detect the light varies based on voltage and use an AD (Analog to digital converter) to convert the digital data.
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We added some extra work to strengthen the circuit, a Dual Differential Comparators **LM393**, compares the differential voltage between the photoresistor and the varistor. It could offer larger and accuracy range of light intensity.
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## Product Features
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- 10K adjustable resistor
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- Software Development Platform: Arduino, UIFlow(Blocky,Python)
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- Two Lego-compatible holes
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## Include
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- 1x LIGHT Unit
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- 1x Grove Cable
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## Specification
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<table>
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<tr style="font-weight:bold">
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<td>Resources</td>
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<td>Parameter</td>
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</tr>
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<tr>
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<td>Adjustable resistance</td>
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<td>10K</td>
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</tr>
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<tr>
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<td>Net weight</td>
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<td>4g</td>
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</tr>
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<tr>
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<td>Gross weight</td>
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<td>17g</td>
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</tr>
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<tr>
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<td>Product Size</td>
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<td>32*24*8*mm</td>
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</tr>
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<tr>
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<td>Package Size</td>
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<td>67*53*12mm</td>
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</tr>
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</table>
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## EasyLoader
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>EasyLoader is a concise and fast program writer, which has a built-in case program related to the product. It can be burned to the main control by simple steps to perform a series of function verification. Please install the corresponding driver according to the device type. M5Core host [Please click here to view the CP210X driver installation tutorial](en/arduino/arduino_development), M5StickC/V/T/ATOM series can be used without driver)
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<div class="easyloader-box">
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<div style="background-color:white;">
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<div><img src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/image/easyloader_intro.webp"></div>
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<div class="easyloader-btn">
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<a href="https://m5stack.oss-cn-shenzhen.aliyuncs.com/EasyLoader/Windows/UNIT/For%20M5Core/EasyLoader_Light_UNIT_With_M5Core.exe">Windows</a>
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<a href="https://m5stack.oss-cn-shenzhen.aliyuncs.com/EasyLoader/MacOS/UNIT/EasyLoader_Light_UNIT_With_M5Core.dmg">MacOS</a>
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<!-- <a>Linux</a>
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<a>MacOS</a> -->
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</div>
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</div>
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<div>
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<video id="example_video" controls>
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<source src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/video/Product_example_video/Unit/Light_UNIT.mp4" type="video/mp4">
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</video>
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<div class="easyloader-mask">
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<a>
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<svg id="play-btn" t="1583228776634" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="4152" width="75" height="75"><path d="M512 0C229.216 0 0 229.216 0 512s229.216 512 512 512 512-229.216 512-512S794.784 0 512 0z m0 928C282.24 928 96 741.76 96 512S282.24 96 512 96s416 186.24 416 416-186.24 416-416 416zM384 288l384 224-384 224z" p-id="4153" fill="#007aff"></path></svg></a>
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<p>Description:</p>
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<p>The screen displays the current ambient light value.</p>
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</div>
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</div>
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</div>
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## Schematic
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<img src="assets/img/product_pics/unit/light_sch.JPG">
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### PinMap
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<table>
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<tr><td>M5Core(GROVE B)</td><td>GPIO36</td><td>GPIO26</td><td>5V</td><td>GND</td></tr>
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<tr><td>LIGHT Unit</td><td>AnalogSignal Pin</td><td>DigitalSignal Pin</td><td>5V</td><td>GND</td></tr>
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</table>
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## Example
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### 1. Arduino
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The code below is incomplete. To complete code, please click [here](https://github.com/m5stack/M5Stack/tree/master/examples/Unit/LIGHT)
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<img src="assets/img/product_pics/unit/unit_example/LIGHT/example_unit_light_04.webp">
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### 2. UIFlow
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- [Click here to download the UIFlow example](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Unit/LIGHT/UIFlow)
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<img src="assets/img/product_pics/unit/unit_example/LIGHT/example_unit_light_03.webp">
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## Video
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**LIGHT - Tutorial**
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<video class="video_size" controls>
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<source src="https://m5stack.oss-cn-shenzhen.aliyuncs.com/video/LukeVideo/m5stack%20iot%20lighting%20part%202%20-%20light%20sensor%20control.mp4" type="video/mp4">
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</video>
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<el-divider content-position="right">Last updated: 2020-12-14</el-divider>
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<script>
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var purchase_link = 'https://m5stack.com/collections/m5-unit/products/light-sensor-unit';
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anchor_search(purchase_link);
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scrollFunc();
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</script>
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