MeterBoard/16A

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MeterBoard/16A is a module for the MeterBoard system that drives 16 analog meters.

Status

  • 2015-07: Integrated into the first version of the HackLab Power Display and working fine. Calling this complete!
  • 2015-03-12: Built, initially tests fine! Need to get CPUE done for full testing.
  • 2014-12-16: 3 boards and 1 set of parts are here.
  • 2014-11-10: Checklisted/finished board, CAMed, sent off to OSH Park for manufacturing.
  • 2014-11-09: Completed BOM and schematic, and completed board layout except for the checklist. Will checklist/CAM it tomorrow.
  • 2014-11-08: Started putting together initial design.

Specs

  • SPI interface to MeterBoard system.
  • 16 buffered analog outputs that can source 50mA at 2.5v each (configurable per-channel levels via resistors)
    • 8-bit outputs resolution, so at 50mV full-scale each step is 190uV
      • ~1/3 degree steps on a 90 degree regular meter
      • ~1 degree steps on a 240 degree long-scale meter