Fixed ERC
Went through ERC and fixed/approved all errors/warnings except for continuity ones. Board needs to be redrawn completely
by
antscience
6 years 4 months
Added SD Card
Forgot to add bypass cap to the SD card reader
by
antscience
6 years 4 months
Added SD Card reader
TODO: Verify if we need to use 3V3 or 5V for the SD card. If it's 3V, then we need to add in a level shifter between ATMEGA and the card.
by
antscience
6 years 4 months
Version 2_UPDATED_ADC
Added in voltage regulators, power and programming headers, and bypass capacitors
TODO: Still need to add in SD card reader circuitry.
CHECK: Do we need to set AGND on the ADC to the sensor ground? Is the 0.5V regulator going to produce a steady reference voltage? What is the voltage for the strain gauges (UPDATE R2 VALUE WHEN WE KNOW)?
by
antscience
6 years 4 months
New board with updated ADC1256 from TI
TODO: Redo calibration circuitry to be single-pot per bridge (REMOVE 1 pot chip), and add in 370 and 5k resistors as done in previous board versions
TODO: Add in programming header, SD card reader, and voltage regulators.
by
antscience
6 years 4 months
Version 1 FINAL
Nearly complete version of the first iteration of the strain gauge logger.
TODO: Check SD card for validity. I have no idea how it's supposed to be hooked up.
by
antscience
6 years 4 months
Added design for Strain Gauge
Rev 0.5: Design supports (most) of a 1 strain gauge or 1/3 rosette gauge reader/store
MISSING: programming header
by
antscience
6 years 4 months