This is a short post showing some of the steps to take the dividing/filter circuit from the MCP4725 Digital to Analog Converter to stripboard or protoboard.
If you know how to solder, this is fairly straightforward. If you are not sure, find a good tutorial and then come back and have a go.
Recall, both Adafruit and Sparkfun provide a breakout board and supporting example code, details of which you can find here (although this design is based around the Sparkfun board):
If you are new to Arduino, see the Getting Started pages.
Parts list
- Arduino Uno
- MCP4725 breakout board (I have a Sparkfun board and some equivalents)
- 1x 390Ω resistor (or I used 1×62Ω and 1×330Ω)
- 1x 110Ω resistor
- 1x 10uF non-polar capacitor
- 1x 3.5mm stereo jack socket
- Protoboard
The Circuit
As a reminder, this is what I am going to be recreating.
As well as my Sparkfun board shown above, I have some cheap versions with the same pinout, so I don’t mind permanently soldering them into my circuit, so the design below assumes the Sparkfun pinout.
Here is one stripboard design for the circuit.
Recall that I am using a 62Ω and 330Ω resistor in lieu of a single 390Ω, but that is because this is what I have in my parts box.
In the end I ended up using some protoboard which meant I could use an even smaller, 8×6 piece of protoboard.
The idea here was to let the DAC board sit proud of the Arduino, but the rest of the circuit would sit over the Arduino, as follows:
The Code
For testing, I’ve simply continued to use the code from the last example: MCP4725 Digital to Analog Converter.
These new boards use the same I2C address as the Sparkfun board.
Closing Thoughts
Here is the new board in action.
I’m now looking into how I can use this with Mozzi. Watch this space.
Kevin
Simple DIY Electronic Music Projects 