DAC0800 with Arduino

Projects General Guidance
1

Hello,

I am trying to charactize my dye sensitized solar cell with Arduino. Some weeks ago, I saw an article that used a dual-channel digital-to-analog converter (DAC), Microchip MCP4822.
They use the circuit:

  • DACa ouput through buffer amp - to A0 and DUT+
  • DACb output - to op amp negative terminal thru 3.3k resistor
  • CS - to digital pin 10 (SS pin)
  • SDI - to digital pin 11 (MOSI pin)
  • SCK - to digital pin 13 (SCK pin)
  • Vout of current meter - to op amp positive terminal through 3.3k resistor
  • Vout of op amp (current measurement) - to A1

However, here in Brazil, I hadnt found it, so I have bought two DAC0800. The problem is that DAC0800 dont have SDI and SCK input.

Can I use two DAC0800 instead of MCP4822? How can I adapt the circuit?

Looking forward to your response!

Sincerely,
Matheus

2

It appears that the chip you're replacing uses an SPI interface, sending the bits to convert to analog serially. The chip you wish to use takes a parallel 8-bit input, so the circuit description you're working from isn't really relevant.

3

Yess! So, I can use the DAC0800 instead of MCP4822, but I will need to change the program.

Sorry for my ignorance, but I am a high school student and it`s my first using arduino, so I will need some help.

The article is : pv.mit.edu/home/education/resources-for-educators/build-your-own-sourcemeter/

Can anyone help me change the program, please?

Looking forward for your response!

Sincerely,
Matheus