Trinket FM Synthesis with Mozzi

Having played around a little with the Adafruit Trinket M0 I'm now starting to spend some time learning about the SAMD21 processor on board as part of an investigation into 32-bit ARM processors and their possibilities for synthesis. In a follow-up post I add MIDI host support via the built-in USB port. In a further … Continue reading Trinket FM Synthesis with Mozzi

MCP4725 Digital to Analog Converter – Part 3

My plan was always to try to use my MCP4725 board with Mozzi eventually, but there is one thing I came to realize that has stopped that ambition.  You can't talk I2C from an interrupt routine using the standard Arduino Wire libraries.  Mozzi uses an interrupt routine to output the audio samples at the required … Continue reading MCP4725 Digital to Analog Converter – Part 3

MCP4725 Digital to Analog Converter – Part 2

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 … Continue reading MCP4725 Digital to Analog Converter – Part 2

MCP4725 Digital to Analog Converter

After my experiments with Mozzi, one thing I wanted to try was using a dedicated digital to analog converter (DAC), which is something the common Arduinos lack. After some searching I found the MCP4725 which links up to the Arduino using the I2C bus.  From the datasheet: "The MCP4725 is a low-power, high accuracy, single … Continue reading MCP4725 Digital to Analog Converter