1127 User Guide: Difference between revisions

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__NOINDEX__
<metadesc>The Phidgets Precision Light Sensor measures light intensities of up to 1000 lux and connects to an Analog Input or VINT Hub port.</metadesc>
[[Category:UserGuide]]
==Getting Started==
==Getting Started==
{{UgSensorIntro|1127|Precision Light Sensor|Voltage Input port}}


===Checking the Contents===
{{UGbox|
'''You should have received:'''
* A precision light sensor
* A sensor cable
|
'''In order to test your new Phidget you will also need:'''
* A PhidgetInterfaceKit 8/8/8 or a PhidgetTextLCD
* A USB cable
||}}


===Connecting the Pieces===
Next, you will need to connect the pieces:
{{UGbox|
[[Image:1127_0_Connecting_The_Hardware.jpg|400px|right|link=]]
#Connect the Precision Light Sensor to the Analog Input 6 on the PhidgetInterfaceKit 8/8/8 using the sensor cable.
# Connect the 1127 to the HUB0000 with the Phidget cable.
#Connect the PhidgetInterfaceKit to your PC using the USB cable.
# Connect the HUB0000 to your computer with the USB cable.
|
[[File:1127_0_Connecting_The_Hardware.jpg|400px|link=]]
||}}


===Testing Using Windows 2000 / XP / Vista / 7===
<br clear="all">
{{UGIntroDone|1127}}


{{UGwin}}
==Using the 1127==
{{UGcontrolpanelSensor|1127|HUB0000}}


===Running Phidgets Sample Program===
{{UGSensorVoltageInput|1127|illuminance (lux)}}


{{UGwin2|'''InterfaceKit-full'''}}
==Technical Details==
 
===General===
{{UGbox|
The human eye is less sensitive to changes in light intensity than the 1127, but is able to see a wider range. The Human eye range is from 50µlx (starlight) to 100klx (extremely bright sunny day). The 1127, on the other hand, is able to measure from 1lx (Moonlight) to 1000lx (TV studio lighting). The 1127 is able to detect higher frequency fluctuations in light levels than the human eye. If you notice noise on
#Double Click on Phidget InterfaceKit 8/8/8 in the Phidget Control Panel to bring up InterfaceKit-full and check that the box labelled Attached contains the word True.
the signal that you cannot perceive yourself, it is probably due to incandescent light flicker, or other varying light sources. This sensor is designed to respond to visible light, and it can sense light from concentrated sources like laser pointers (although be careful with high-power lasers, as they could damage the sensor). It will also have a very muted response to IR light that is close to the visible spectrum (700-800nm). The 1127 is non-ratiometric which means that you cannot rely on the sensor saturating at 5 volts. To be conservative, interpret a sensor voltage of over 4.75V as saturated, with the true light level being unknown.
#Make sure that the Ratiometric box is NOT Ticked.
#Move the Precision Light Sensor around and the amount of human perceivable luminosity is displayed in the Analog in Box.
#You can adjust the input sensitivity by moving the slider pointer.
#Click on the Sensors button to bring up the Advanced Sensor Form.
|
[[File:placeholder.jpg|400px|link=]]
|
#In the Sensor 6 box, select the 1127 - Precision Light Sensor from the drop down menu.
#The amount of luminosity in lux is shown here.
#Formula used to convert the analog input SensorValue into lux. The sensor actually outputs in lux.
|
[[File:1127 0 Advanced Sensor Form Screen.jpg|link=|400px]]
}}
 
===Testing Using Mac OS X===
 
{{UGmac| | }}
 
===Using Linux===
 
{{UGlinux}}
 
===Using Windows Mobile / CE 5.0 / CE 6.0===


{{UGce}}
===Sensitivity Response===
The 1127 uses the AMS104 light sensor package. The following graph illustrates the sensor's sensitivity to specific wavelengths of light.


==Technical Details==
[[File:AMS104.jpg|link=|500px|center]]
The human eye is less sensitive to changes in light intensity than the 1127, but is able to see a wider range.  The Human eye range is from 50 µlux (starlight) to 100 klx (extremely bright sunny day).  The 1127, on the other hand,  is able to measure from 1 lux (Moonlight) to 1000 lux (TV studio lighting) The 1127 is able to detect higher frequency fluctuations in light levels than the human eye.  If you notice noise on
the signal that you cannot perceive yourself, it is probably due to incandescent light flicker, or other varying light sources. The 1127 is Non-Ratiometric which means that you cannot rely on the sensor saturating at 1000 SensorValue.  To be conservative, interpret SensorValue over 950 as saturated, with the true light level being unknown.


===Formulas===
===Formulas===
The formula to translate SensorValue into luminosity is:
{{UGSensorFormula|illuminance (lux)}} The formula to translate voltage from the sensor into illuminance is:


<math>Luminosity(lux) = SensorValue</math>


{{UGotherint}}
:<math>
\text{Illuminance (lux)} = \text{Voltage} \times 200
</math>
<br clear="all">


{{UGasens}}
{{UGasens}}


==Product History==
{{UGnext|}}
{{UGhist}}
{{UGrow|May 2008 |0 |N/A |Product Release }}

Latest revision as of 20:56, 8 May 2018


Getting Started

Welcome to the 1127 user guide! In order to get started, make sure you have the following hardware on hand:


Next, you will need to connect the pieces:

1127 0 Connecting The Hardware.jpg
  1. Connect the 1127 to the HUB0000 with the Phidget cable.
  2. Connect the HUB0000 to your computer with the USB cable.


Now that you have everything together, let's start using the 1127!

Using the 1127

Phidget Control Panel

In order to demonstrate the functionality of the 1127, we will connect it to the HUB0000, and then run an example using the Phidget Control Panel on a Windows machine.


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 1127.

First Look

After plugging in the 1127 into the HUB0000, and the HUB0000 into your computer, open the Phidget Control Panel. You will see something like this:

HUB0000 Panel.jpg


The Phidget Control Panel will list all connected Phidgets and associated objects, as well as the following information:

  • Serial number: allows you to differentiate between similar Phidgets.
  • Channel: allows you to differentiate between similar objects on a Phidget.
  • Version number: corresponds to the firmware version your Phidget is running. If your Phidget is listed in red, your firmware is out of date. Update the firmware by double-clicking the entry.


The Phidget Control Panel can also be used to test your device. Double-clicking on an object will open an example.

Voltage Input

Double-click on a Voltage Input object in order to run the example:

1018 Sensors VoltageInput.png


General information about the selected object will be displayed at the top of the window. You can also experiment with the following functionality:

  • Modify the change trigger and/or data interval value by dragging the sliders. For more information on these settings, see the data interval/change trigger page.
  • Select the 1127 from the Sensor Type drop-down menu. The example will now convert the voltage into illuminance (lux) automatically. Converting the voltage to illuminance (lux) is not specific to this example, it is handled by the Phidget libraries, with functions you have access to when you begin developing!


Technical Details

General

The human eye is less sensitive to changes in light intensity than the 1127, but is able to see a wider range. The Human eye range is from 50µlx (starlight) to 100klx (extremely bright sunny day). The 1127, on the other hand, is able to measure from 1lx (Moonlight) to 1000lx (TV studio lighting). The 1127 is able to detect higher frequency fluctuations in light levels than the human eye. If you notice noise on the signal that you cannot perceive yourself, it is probably due to incandescent light flicker, or other varying light sources. This sensor is designed to respond to visible light, and it can sense light from concentrated sources like laser pointers (although be careful with high-power lasers, as they could damage the sensor). It will also have a very muted response to IR light that is close to the visible spectrum (700-800nm). The 1127 is non-ratiometric which means that you cannot rely on the sensor saturating at 5 volts. To be conservative, interpret a sensor voltage of over 4.75V as saturated, with the true light level being unknown.

Sensitivity Response

The 1127 uses the AMS104 light sensor package. The following graph illustrates the sensor's sensitivity to specific wavelengths of light.

AMS104.jpg

Formulas

The Phidget libraries can automatically convert sensor voltage into illuminance (lux) by selecting the appropriate SensorType. See the Phidget22 API for more details. The formula to translate voltage from the sensor into illuminance is:



Phidget Cable

Analoginput.jpg

The Phidget Cable is a 3-pin, 0.100 inch pitch locking connector. Pictured here is a plug with the connections labelled. The connectors are commonly available - refer to the Analog Input Primer for manufacturer part numbers.

What to do Next

  • Programming Languages - Find your preferred programming language here and learn how to write your own code with Phidgets!
  • Phidget Programming Basics - Once you have set up Phidgets to work with your programming environment, we recommend you read our page on to learn the fundamentals of programming with Phidgets.