ramped magnetic field circuit for a miniature mass spectrometer


Posted on Feb 7, 2014

The general idea is to space the time internals to increment the DAC output values. There would be 256 levels since there are 8 digital outputs from the Arduino board. Therefore, for an 8-bit, 50s ramp time for example, the way to generate a digital ramp  waveform is to increment every level per (50/256)s.


ramped magnetic field circuit for a miniature mass spectrometer
Click here to download the full size of the above Circuit.

No matter what the code will be, a DAC is required to convert digital signal to analog signal. An R-2R Ladder is a simple and inexpensive way to perform digital-to-analog conversion, using repetitive arrangements of precision resistor networks in a ladder-like configuration. Now I use fritzing to draw the schematic of R-2R ladder DAC circuit.




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