Motivation

AVR ATMega328p Testboard

Building a ADSR or LFO with certain features can become very complex and costly. And there are features that can not be realized at all. Like special waveforms. Other functions are hard to realize in the analog domain. So i wanted to experiment with a microprocessor in the digital domain. To start with i build a testboard around the ATMega328p and the 12bit analog to digital converter MCP4921. I added some hardware features that i found might be useful.


Specs and features


Implementation

Schematic

NGF Waveshaper schematic

Description:

t.b.d.

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Calibration

  • Adjust the trimmers for the threshold voltage to 2.5V and 5V

Special parts

None

AVR ATMega328p TestBoard

2015 February

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