Analog Out Bricklet

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Features

• Generates configurable voltages up to 5V*
• Specification in 1mV steps (12bit resolution)
• Configurable with load resistor to ground

Description

The Analog Out Bricklet can be used to extend the features of Bricks by the capability to generate voltages between 0V and 5V*. The voltage can be configured directly in Volt without any conversion. The device is equipped with a 12-bit Digital-to-Analog Converter (DAC). Instead of generating a voltage it is also possible to choose between a 1k, 100k or 500k Ohm load resistor to ground (pull-down).

Technical Specifications

Property	Value
DAC	MCP4725
Voltage	0V - 5V* in 1mV steps, 12bit resolution
Maximum Current	24mA
Dimensions (W x D x H)	30 x 25 x 14mm (1.18 x 0.98 x 0.55”)
Weight	6g

* The maximum output voltage depends on the supply voltage. If the connected Brick is powered over USB, 5V may not be reached. The reason for this is a voltage drop about 0.5V caused by protection diodes on our products. If you need to reach 5V, you have to use a stack supply, e.g. the Step-Down Power Supply.

Resources

• MCP4725 datasheet (Download)
• Schematic (Download)
• Outline and drilling plan (Download)
• Source code and design files (Download)

Connectivity

The Analog Out Bricklet has four terminals. All terminals are outputs. Between VOUT and GND the output voltage is applied. 3.3V and 5V are additional outputs with fixed voltages you can use to power things.

Test your Analog Out Bricklet

To test the Analog Out Bricklet you need to have the Brick Daemon and the Brick Viewer installed (for installation guides click here and here) and the Brick Viewer has to be connected to the Brick Daemon.

Connect the Analog Out Bricklet to a Brick with the supplied cable (see picture below).

If you connect the Brick to the PC over USB, you should see a new tab named “Analog Out Bricklet” in the Brick Viewer after a moment. Select this tab. In this tab you can configure the voltage on the output pin. For test purposes, you can measure this voltage with a voltmeter. If everything went as expected the voltage on the voltmeter and the voltage you have configured should be identical.

After this test you can go on with writing your own application. See the Programming Interface section for the API of the Analog Out Bricklet and examples in different programming languages.

Programming Interfaces

High Level Programming Interface

See High Level Programming Interface for a detailed description.

Language	API	Examples	Installation
Modbus	API
TCP/IP	API
C/C++	API	Examples	Installation
C#	API	Examples	Installation
Delphi	API	Examples	Installation
Java	API	Examples	Installation
PHP	API	Examples	Installation
Python	API	Examples	Installation
Ruby	API	Examples	Installation
VB.NET	API	Examples	Installation