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RIOT/tests/periph/dac/README.md

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About
=====
This is a test application for a digital to analog converter (DAC).
This test application tries to initialize every available DAC line. If
successful, it will output a saw tooth pattern with a period of about 10Hz on
each of the available lines.
Usage
=====
Connect an oscilloscope to the DAC pins and look at the signal levels (you
should be able to clearly see the saw tooth signal in your scope)