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 "Compatible Products" tab for a list of options.
|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|
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. If you would like to follow along, first 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:
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.
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.