Quantity Available: 350
| Qty | Price |
|---|---|
| 5 | $11.40 |
| 10 | $10.80 |
| 25 | $9.60 |
| 50 | $8.40 |
| 100 | $7.80 |
| 250 | $7.20 |
| 500 | $6.60 |
| 1000 | $6.00 |
The Touch Keypad Phidget works like a smartphone's touchscreen, sensing the change in capacitance as your finger comes near. You can place the Touch Keypad Phidget behind up to 3mm of glass or plastic, allowing you to enclose the hardware to make the panel child-friendly and aesthetically pleasing. This Phidget connects to your computer through a VINT Hub.
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:
| Product | Board | |||
|---|---|---|---|---|
| Image | Part Number | Price | Number of VINT Ports | Controlled By |
 |
HUB0000_0 | $30.00 | 6 | USB (Mini-USB) |
 |
HUB5000_0 | $60.00 | 6 | Local Network (Ethernet or Wi-Fi) |
 |
SBC3003_0 | $120.00 | 6 | — |
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.
The Touch Keypad Phidget provides seven capacitive touch regions with adjustable sensitivity.
You can use your Control Panel to explore your Phidget's channels.
1. Open your Control Panel, and you will find the following channels:
2. Double click on a channel to open an example program. Each channel belongs to the CapacitiveTouch channel class:
In your Control Panel, double click on "Capacitive Touch Sensor":
1. Setting up your Programming Environment
Before you open a Phidget channel in your program, you can set these properties to specify which channel to open. You can find this information through the Control Panel.
1. Open the Control Panel and double-click on the red map pin icon:
2. The Addressing Information window will open. Here you will find all the information you need to address your Phidget in your program.
See the Phidget22 API for your language to determine exact syntax for each property.
In the Phidget Control Panel, open the channel for your device and click on the 
icon next to the data type that you want to plot. This will open up a new window:
If you need more complex functionality such as logging multiple sensors to the same sheet or performing calculations on the data, you'll need to write your own program. Generally this will involve addressing the correct channel, opening it, and then creating an Event Handler and adding graphing/logging code to it.
The quickest way to get started is to download some sample code for your desired programming language and then search google for logging or plotting in that language (e.g. "how to log to csv in python") and add the code to the existing change handler.
The Change Trigger is the minimum change in the sensor data needed to trigger a new data event. The Data Interval is the time (in ms) between data events sent out from your Phidget. You can modify one or both of these values to achieve different data outputs. You can learn more about these two properties here.
The capacitive touch sensors rely on checking capacitance against a threshold to detect when they are touched. As a result you need to keep a good baseline of the capacitance of the sensor's environment. The HIN1000 will recalibrate its baseline levels if it detects a constant touch for more than 60 seconds, in order to prevent getting stuck in a touched state. Similarly, it will recalibrate its baseline capacitance to adjust to falling capacitance (such as when it is moved away from a surface) in order to prevent getting stuck in a not-touched state. The latter adjustment happens soon after the baseline is detected to have fallen.
| Sensor Properties | |
|---|---|
| Controlled By | VINT |
| Calibration Time | 45 s |
| Sampling Interval Max | 1 s/sample |
| Sampling Interval Min | 25 ms/sample |
| Detecting Distance Max | 5 mm |
| Electrical Properties | |
| Current Consumption Max | * 3.6 mA |
| Current Consumption Min | 50 μA |
| Physical Properties | |
| Operating Temperature Min | -40 °C |
| Operating Temperature Max | 85 °C |
| Customs Information | |
| Canadian HS Export Code | 8471.80.00 |
| American HTS Import Code | 8471.80.40.00 |
| Country of Origin | CN (China) |
* - Current consumption varies depending on selected data interval. See the graph below for details.
We reccomend the following sensitivity setting depending on your application:
| Sensitivity (0-1) | Application |
|---|---|
| 0.8 - 1.0 | Behind up to 3mm of glass |
| 0.2 | Inside default enclosure |
| Date | Board Revision | Device Version | Comment |
|---|---|---|---|
| August 2017 | 0 | 104 | Product Release |
| Channel Name | API | Channel |
|---|---|---|
| Capacitive Touch Sensor | CapacitiveTouch | 0 - 6 |
| API | Detail | Language | OS | |
|---|---|---|---|---|
| CapacitiveTouch | Visual Studio GUI | C# | Windows | Download |
| CapacitiveTouch | Java | Android | Download | |
| CapacitiveTouch | JavaScript | Browser | Download | |
| CapacitiveTouch | Objective-C | macOS | Download | |
| CapacitiveTouch | Swift | macOS | Download | |
| CapacitiveTouch | Swift | iOS | Download | |
| CapacitiveTouch | Visual Basic .NET | Windows | Download | |
| CapacitiveTouch | Max/MSP | Multiple | Download |
