IT: Arduino Setup (144)

The main reason to use the Arduino is to use a D-to-A converter to generate an output wave by generating the sampled output. A sampled sin wave is actually output by the Arduino Script program listed in Source 07. Many more images and some additional programming information are included in Source 01.

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Digital-to-Analog using an Arduino

The 5 minute video in Source 02 explains how to drive an MCP4725 DAC (US$ 1.00) using an Arduino. It does not show any oscilloscope screens nor any Arduino code.

ADC and DAC

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The nearly 1 hour videos (probably by Peter of "thebreadboard" videos or Peter Oakes of www.thebreadboard.ca ) in Sources 03 and 04 explain how to drive an MCP4725 DAC and an ADS1220 (US$ 1.00) using an Arduino. These two devices are both quad devices. He also explains how to solder a tiny IC (in a TSSOP-16 package) using a hot air gun and alcohol wipes. He then solders on the necessary headers.

ADC

The author of the video uses an ADS1220 for A-to-D converstion. See Source 08 which is the data sheet for the ti ADS1220.

DAC using I2C

He uses a DAC8574 (into a MSP430F449) for D-to-A. The DAC I2C address is 098h which must be shifted left 1 bit (to become 04Ch). Channel 4 outputs the correct signal. He refers to a TI PDF Application Note that is available in Source 05 for the DAC.

Later in the 2nd video he uses an Arduino script to create a sin wave. His Arduino Script code (corrected) in txt mode is in Source 07. A zipped version is in Source 06. This code produces a "sampled" version of an analog sine wave on the DAC8574 channel 4 output pin.

Web Sources

Web Source S144:01: INA3221 Triple Load Current and Voltage Sensor article by D@CC on 2020FJun 20
Web Source S144:02: DTA using MCP4725 and an Arduino min Video by learntronics in 2018
Web Source S144:03: Arduino UNO, using precision ADCs and DACs Part 1: ADC 60 min Video by theBreadboard in 2015
Web Source S144:04: Arduino UNO, using precision ADCs and DACs Part 2: DAC 40 min Video by theBreadboard in 2015
Web Source S144:05: Interfacing the DAC8574 to the MSP430F449 by Jojo Parguian of TI in 2003
Web Source S144:06: Arduino DAC code (zipped) corrected zipped DAC code in 2017
Web Source S144:07: Arduino DAC code (unzipped) corrected DAC Script code in 2017
Web Source S144:08: ADS1220 Data Sheet by TI in 2016
Web Source S144:09: theBreadboard site by Peter Oakes


WebMaster: Ye Old King Cole

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Created: 2020F Jun 20
Updated: 2023H Aug 06

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