Revision 3

[KonradMcClure]

Built off of the original Revision 1 (and an intermediary Rev 2) of the Alkalinity Titrator PCB.

• Expanded PCB to include all breakout boards and appropriate interfacing
• Reworked the pH probe circuit to increase resistance to noise and increase precision
• Changed PT1000 connections to 3.5mm jack interface
• Added BD65496MUV dc motor driver for magnetic stirrer
• Added LCD, keypad, and magnetic stirrer components

The PCB has been largely revised starting in Fall. Revision 1 started with a simple PCB based off the original Alkalinity Titrator prototype, created by Greg Birge. Revision 2 was an updated board that was fabricated, tested, and then reworked into the current Revision 3. Most features of the Rev 2 and Rev 3 are the same, though a series of mistakes were corrected.

The board measures 85x100mm and is made to mount directly on top of the Raspberry Pi 3b/4b. It requires a dual channel 5V and 12V power supply, with the MEAN WELL RD-65A selected as the current supply to test with.

[prestoncarman]

@all-contributors please add @KonradMcClure and @Noah-Griffith for code

[allcontributors[bot]]

@prestoncarman

I've put up a pull request to add @KonradMcClure! :tada:

[prestoncarman]

@all-contributors please add @Noah-Griffith for code

[allcontributors[bot]]

@prestoncarman

I've put up a pull request to add @Noah-Griffith! :tada: