資料來源:https://www.sparkfun.com/products/14290
The Qwiic Visible Spectral Sensor uses the AS7262 visible spectrometer from AMS for spectral identification. What can you do with Reflectance Spectroscopy? It’s an amazing field of study, and the AS7262 brings what used to be prohibitively expensive equipment to the desktop. The AS7262 should not be confused with highly complex mass spectrometers, but the sensor does give the user the ability to measure and characterize how different materials absorb and reflect visible light. This can be useful for measuring measuring reflective indices; photosynthetic light-use efficiency is one such example.
The AS7262 is the visible light version of the spectral sensor capable of measuring 450, 500, 550, 570, 600, and 650nm of light each with 40nm of full-width half-max detection.
The AS726x is unique in that it has both an I2C interface and a serial interface with AT commands. The default is I2C but can be changed with two jumpers. We added the common serial connector so you can connect directly to a computer via USB-to-Serial if needed.
The on-board 5700k extremely bright white LED will illuminate the sample you are measuring. If needed, the LED can be disabled and a low voltage incandescent bulb can be used for better black-body illumination during readings. Additionally, the AS726x has an electronic shutter meaning you can turn the light source (LED or bulb) on and off via software. You can also control the current to the light source (12.5, 25, 50, and 100mA), which varies the brightness enabling different exposure levels of the sample.
We’ve added an .stl file of a light-blocking shroud for this board, to make it possible to block out any ambient light, making for more consistent reading from multiple surfaces.
The Qwiic system enables fast and solderless connection between popular platforms and various sensors and actuators. You can read more about the Qwiic system here. We carry 50mm, 100mm, 200mm, 500mm, and breadboard friendly Qwiic cables.
We do not plan to regularly produce SparkX products so get them while they’re hot!
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Qwiic可見光譜傳感器使用AMS的AS7262可見光譜儀進行光譜識別。 反射光譜可以做什麼?這是一個驚人的學習領域,AS7262帶來了以往非常昂貴的設備到桌面。 AS7262不應與高度複雜的質譜儀相混淆,而傳感器確實為用戶提供了測量和表徵不同材料吸收和反射可見光的能力。這可用於測量測量反射指數; 光合光利用效率就是這樣一個例子。
AS7262是能夠測量450,500,550,570,6600和650nm光的光譜傳感器的可見光版本,每個具有40nm的全寬半最大檢測。
AS726x的獨特之處在於它具有I 2 C接口和帶AT命令的串行接口。默認值為I 2 C,但可以使用兩個跳線進行更改。我們添加了通用的串行連接器,以便您可以在需要時通過USB到串口直接連接到計算機。
板載5700k極亮的白色LED將照亮您正在測量的樣品。如果需要,LED可以被禁用,並且低電壓白熾燈泡可以用於讀取期間更好的黑體照明。此外,AS726x具有電子快門,意味著您可以通過軟件打開和關閉光源(LED或燈泡)。您還可以控制電流到電源(12.5,25,50和100mA),這會改變亮度,從而可以實現樣品的不同曝光水平。
我們已經為此板添加了一個遮光罩的.stl文件,可以阻擋任何環境光,從而使多個表面的讀數更加一致。
Qwiic系統可實現流行平台和各種傳感器和執行器之間的快速無焊接連接。您可以在這裡閱讀有關Qwiic系統的更多信息。我們攜帶50mm , 100mm , 200mm , 500mm和麵包板友好的 Qwicic電纜。
我們不打算定期生產SparkX產品,讓他們在熱的時候!
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