Products for USB Sensing and Control

Products for USB Sensing and Control

PHIDGETS Inc.

Unit 1 - 6115 4 St SE
Calgary AB  T2H 2H9
Canada
+1 403 282-7335

(±1V) Voltage Input Phidget

ID: VCP1002_0

Measure tiny voltage differences of up to ±1V with precision. This Phidget is isolated and plugs into a VINT port.

$25.00

Quantity Available: 484

Qty Price
5 $23.75
10 $22.50
25 $20.00
50 $17.50
100 $16.25
250 $15.00
500 $13.75
1000 $12.50

This Voltage Input Phidget provides a way to measure small voltages anywhere in a circuit. It plugs directly into a VINT port and has a set of selecable voltage ranges from ±1V down to ±10mV, with smaller ranges having higher precision (See the "Compatible Products" tab for a list of VINT Hubs). This Phidget also has an automatic mode that continuously adjusts the range based on present voltage measurements, so you'll always have the most accurate measurement possible.



Ideal for Use with Current Sense Resistors

You can use this Phidget to measure current in a pinch: Just place a known resistor in series with the circuit, and measure the voltage drop across it. Knowing the voltage and resistance, you can then use Ohm's law to calculate the current.

Isolated for Stability

This Phidget is electrically isolated, so a power surge on the circuit you're measuring will not damage your VINT Hub or your computer. Isolation also improves stability by eliminiating potential ground loops.

Product Specifications

Sensor Properties
Sensor Type Voltage (DC)
Board Properties
Controlled By VINT
Voltage Sensor
Voltage Difference Max ± 1 V DC
Withstand Voltage Max ± 50 V DC
Sampling Interval Max 60 s/sample
Sampling Interval Min 40 ms/sample
Sensor Input Impedance 1 MΩ
Measurement Error Max 0.1 %
Number of Voltage Inputs 1
Voltage Resolution 1 mV DC
±10 mV Range
Voltage Resolution 300 nV DC
Voltage Offset Max 25 μV DC
Measurement Error Max 0.5 %
Voltage Noise 6 μV DC
±40 mV Range
Voltage Resolution 1.2 μV DC
Voltage Offset Max 40 μV DC
Measurement Error Max 0.25 %
Voltage Noise 25 μV DC
±200 mV Range
Voltage Resolution 6 μV DC
Voltage Offset Max 200 μV DC
Measurement Error Max 0.25 %
Voltage Noise 100 μV DC
±1 V Range
Voltage Resolution 28.8 μV DC
Voltage Offset Max 1 mV DC
Measurement Error Max 0.3 %
Voltage Noise 500 μV DC
Electrical Properties
Current Consumption Max 12 mA
Physical Properties
Recommended Wire Size 16 - 26 AWG
Operating Temperature Min -40 °C
Operating Temperature Max 85 °C

Software Objects

Channel NameAPIChannel
Voltage Input VoltageInput 0

API


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Documents

Library & Driver Downloads

Code Samples

APILanguageOS
VoltageInput C Multiple Download
VoltageInput C# Windows Download
VoltageInput Java Multiple Download
VoltageInput JavaScript Any Download
VoltageInput Objective-C macOS Download
VoltageInput Python Multiple Download
VoltageInput Visual Basic .NET Windows Download

Projects

Product History

Date Board Revision Device Version Comment
June 20170106Product Release

Getting Started

Welcome to the VCP1002 user guide! In order to get started, make sure you have the following hardware on hand:


Next, you will need to connect the pieces:

VCP1002 Functional.jpeg
  1. Connect the VCP1002 to the VINT Hub using the Phidget cable.
  2. Connect the voltage source to the terminals of the Voltage Input Phidget (ground to the minus terminal, supply to the plus terminal).
  3. Connect the VINT Hub to your computer with a USB cable.


Now that you have everything together, let's start using the VCP1002!

Using the VCP1002

Phidget Control Panel

In order to demonstrate the functionality of the VCP1002, 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 VCP1002.

First Look

After plugging the VCP1002 into your computer and opening the Phidget Control Panel, you will see something like this:

VCP1002 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 the Voltage Input object , labelled 10-bit (±1V) Voltage Input Phidget, in order to run the example:

VCP1002 VoltageInput Example.jpg


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.

Technical Details

Isolation

The VCP1002 is electrically isolated, so a power surge in the circuit you're measuring would only damage the VCP1002- it won't damage your Hub or your computer. Having isolation also helps prevent the formation of ground loops in your system.

Another advantage of isolation on the VCP1002 is the capability to measure the voltage differential between two points of a circuit regardless of their relation to ground, as long as the voltage differential between those points is within the specification of the sensor.

For example, take the pictured battery charging circuit; there is sufficient complexity between the current sense resistor (Rsense) and the VINT Hub that trying to directly measure the voltage with a non-isolated sensor could be a risky proposition. However, thanks to the isolated nature of the VCP1002, the voltage across the resistor may be measured directly, ignoring the circuits in between.

Measuring the voltage across "Rsense" in this circuit is made easy through isolation!


Current Sense Resistors

The VCP1002 is made to measure small voltages anywhere in a circuit. This makes it the ideal candidate for use with current sense resistors to measure current.

For an in-depth look at how to use current sense resistors with the VCP1002, see our article about Current Sense Resistors.

What to do Next

  • Software Overview - Find your preferred programming language here to learn how to write your own code with Phidgets!
  • General Phidget Programming - Read this general guide to the various aspects of programming with Phidgets. Learn how to log data into a spreadsheet, use Phidgets over the network, and much more.
  • Phidget22 API - The API is a universal library of all functions and definitions for programming with Phidgets. Just select your language and device and it'll give you a complete list of all properties, methods, events, and enumerations that are at your disposal.

VINT Hubs

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
HUB0000_0 $30.00 6
SBC3003_0 $120.00 6

Phidget Cables

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.

Product Physical Properties
Image Part Number Price Cable Length
3002_0 $2.00 600 mm
3003_0 $1.50 100 mm
3004_0 $3.00 3.5 m
3034_0 $1.50 150 mm
3038_0 $2.25 1.2 m
3039_0 $2.75 1.8 m

Have a look at our DC voltage sensors:

Product Voltage Sensor Sensor Properties
Image Part Number Price Voltage Difference Max Input Voltage Min (DC) Input Voltage Max (DC)
1135_0 $19.00 ± 30 V DC
3507_0 $115.00
3508_0 $115.00
3509_1 $115.00 0 V DC 200 V DC
DAQ1400_0 $20.00
VCP1000_0 $50.00 ± 40 V DC
VCP1001_0 $25.00 ± 40 V DC
VCP1002_0 $25.00 ± 1 V DC