Changes between Version 22 and Version 23 of MultiTEMS


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Timestamp:
Nov 23, 2021, 3:10:55 PM (10 months ago)
Author:
Eric Hazen
Comment:

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  • MultiTEMS

    v22 v23  
    5757Investigating pseudo-sine wave output.  They want in principle up to 20kHz.  The Arduino Pro Mini we have runs at 8MHz (since it's 3.3V).  That would make for rather poor PWM, though the TimerOne library can manage PWM outputs pretty well.
    5858
    59 If they want to really do sine waves, we would need a HV buffer output, from e.g. an LTC6090 HV op-amp (140V p-p output).  One could use a single DAC with an analog switch/mux driving four output buffers to avoid HV switching.
     59If they want to really do sine waves, we would need a HV buffer output, from e.g. an LTC6090 HV op-amp (140V p-p output).  One could use a single DAC with an analog switch/mux driving four output buffers to avoid HV switching.  DAC output should be 100-300kHz.  Could use e.g. MCP4921 (12-bit SPI DAC).
    6060
    6161'''2021-11-16'''