SpiroBoardB06.pdf

Latest version of the schematic. Added optional screw terminal power input, larger sense resistor, and RC on sense resistor connections to ADC

Adobe Portable Document Format - 115.18 kB - 01/08/2019 at 21:26

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read_ec_ph.py

This opens the pigpio library and calls a function in spiroboard.py to read the EC and pH

plain - 1.43 kB - 09/06/2018 at 14:31

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spiroboard.py

This is a python file that uses the pigpio library to read the EC and pH from the Spiroboard

text/plain - 17.12 kB - 09/06/2018 at 14:25

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SpiroBoardB05.pdf

This is the schematic for the new sample-and-hold version of the design. The frequency and amplitude of the square waves used to measure the EC can be programmed through software on the RPi.

Adobe Portable Document Format - 106.64 kB - 07/17/2018 at 04:45

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spiroboarda04.pdf

This is the original schematic for the PC board. While debugging, I found a few problems that require a bit of surgery on the board. I will upload a new schematic when I have finished debugging, assuming that the patient lives.

Adobe Portable Document Format - 86.23 kB - 02/16/2017 at 13:54

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