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This handly little sensor measures the amount of light shining on it, making it a perfect addition to automated systems that need to switch on at night or in low-light conditions. It has a wide measurement range from 188 microlux (starlight on a moonless night) to 220,000 lux (direct sunlight). It connects to a VINT Hub port with a Phidget cable. Have a look at the Connection & Compatibility tab for a list of options.
This Phidget is a smart device that must be controlled by a VINT Hub. For more information about VINT, have a look at the VINT Primer. You can use a Phidget Cable to simply and easily connect the two devices. Here's a list of all of the different VINT Hubs currently available:
Use a Phidget cable to connect this device to the hub. You can solder multiple cables together in order to make even longer Phidget cables, but you should be aware of the effects of having long wires in your system.
Welcome to the LUX1000 user guide! In order to get started, make sure you have the following hardware on hand:
Next, you will need to connect the pieces:
Now that you have everything together, let's start using the LUX1000!
In order to demonstrate the functionality of the LUX1000, the Phidget Control Panel running on a Windows machine will be used.
The Phidget Control Panel is available for use on both macOS and Windows machines.
To open the Phidget Control Panel on Windows, find the icon in the taskbar. If it is not there, open up the start menu and search for Phidget Control Panel
To open the Phidget Control Panel on macOS, open Finder and navigate to the Phidget Control Panel in the Applications list. Double click on the icon to bring up the Phidget Control Panel.
For more information, take a look at the getting started guide for your operating system:
Linux users can follow the getting started with Linux guide and continue reading here for more information about the LUX1000.
After plugging the LUX1000 into your computer and opening the Phidget Control Panel, you will see something like this:
The Phidget Control Panel will list all connected Phidgets and associated objects, as well as the following information:
The Phidget Control Panel can also be used to test your device. Double-clicking on an object will open an example.
Double-click on the Light Sensor object, labelled Light Phidget, in order to run the example:
General information about the selected object will be displayed at the top of the window. You can also experiment with the following functionality:
Before you can access the device in your own code, and from our examples, you'll need to take note of the addressing parameters for your Phidget. These will indicate how the Phidget is physically connected to your application. For simplicity, these parameters can be found by clicking the button at the top of the Control Panel example for that Phidget.
In the Addressing Information window, the section above the line displays information you will need to connect to your Phidget from any application. In particular, note the Channel Class field as this will be the API you will need to use with your Phidget, and the type of example you should use to get started with it. The section below the line provides information about the network the Phidget is connected on if it is attached remotely. Keep track of these parameters moving forward, as you will need them once you start running our examples or your own code.
You are now ready to start writing your own code for the device. The best way to do that is to start from our examples:
This Phidget is compatible with the LightSensor Examples.
Once you have your example, you will need to follow the instructions on the page for your programming language to get it running. To find these instructions, select your programming language from the Software Overview page.
Current consumption on the LUX1000 is dependent on the sampling interval you choose. More current is used for frequent samples.
Because of these dynamic ranges, you may see momentary saturation when trying to measure large changes in light intensity in short periods of time (for example, a strobe light). Once the light level stabilizes though, the sensor should be able to settle back into optimal range settings.
The light sensor on the LUX1000 is designed to sense light in a way that emulates the response of the human eye. However, digital light sensors work very differently than our eyes do. Using the photoelectric effect, the photodiodes in the sensor will generate current when struck by incoming photons. The problem is that the range of wavelengths that these photodiodes respond to vary depending on what materials they're made of, and none of them have the same response as the human eye.
The solution offered by the chip used in the LUX1000 is to take readings from two different photodiodes; one that detects only IR light (which is invisible to the human eye) and one that detects both visible and IR light. Once it has these measurements, it weights them with coefficients based on calibration testing, and then subtracts the IR component from the diode that detects both IR and visible light. The result is a workable approximation of brightness as seen by a human eye.
|Light Level Min||188 μlx|
|Light Level Max (5V)||220 klx|
|Light Resolution||188 μlx|
|Sampling Interval Min||125 ms/sample|
|Sampling Interval Max||60 s/sample|
|Current Consumption Max||* 500 μA|
|Current Consumption Min||20 μA|
|Operating Temperature Min||-15 °C|
|Operating Temperature Max||70 °C|
* - Current consumption varies depending on selected data interval. See the technical section of the User Guide for details.
|LightSensor||Visual Basic .NET||Windows||Download|
|Date||Board Revision||Device Version||Comment|
|June 2017||0||100||Product Release|