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I've owned my pool since 1977 (yep, 45 years!), and back then, I had a single speed 3HP pump running 8 hours a day, based on advice from neighbors. The pool only has about 16,000 gallons, but the pump, filter and heater were sized for the attached spa. I replaced all the equipment 10 years ago...

The motor on the pump had a label on it that said 24v. When I ran it at 19v (nominal power supply rating, not measured) it pumped 198mL/Min, and at 12 v it pumped 52mL/Min. The native controller probably runs it at 17v or so. Not important, as long as the voltage remains stable, the flow rate...

rstrouse... I think I'm getting to the same place. Actually, I've implemented the arithmetic into my software already, although I haven't taken the time to calibrate my pump, nor display a calculated value on my dashboard. Easy steps, and I'll take them soon....

And it turns out the acid vapors were, indeed, fatal to my exposed sensor setup: after only one day inside the tank, every metallic surface including solder joints had a green or gray patina, and the sensor had failed electrically. So I knew I had to have a hermetic enclosure for the sensor, and...

So I did a little packaging and installed the sensor in my tank, and it works very, very well, with a few caveats I'll cover below. First some pics: I designed and 3d printed a sensor housing for the sensor board, Pic 1. It has an acrylic window, but more on that later. The housing interfaces...

MyAZPool...I kept noodling for a way to directly measure the remaining acid level with some kind of a sensor. I evaluated four ideas, and here is the winner: I bought a tiny device (a VL53LO chip mounted on a development board, two for $13 on Amazon). The device can very accurately measure the...

So, software is never done, you know? Neither are projects like this, because you always dream up improvements. So a couple of things... (1) I generalized the time-tagged data log displayed on my dashboard to do more than just report the percent of the acid adds. It now reports additional kinds...

So, here's the final implementation, installed in the original controller box for convenience. A couple of notes.... (1) I added the "red button" on the right side of the box exterior, and pushing it forces a 4 ounce acid add, just in case I need it. (2) I added logic to suppress acid add if the...

MyAZPool... Thanks very much for the great leads on further enhancements of what I got. A lot to digest and I look forward to doing just that. For the moment, I've completed my Phase 2 objective of having a workable ESP32 timer installed on my IntelliPH, controlled by a dashboard on the...

So I measured the DC voltages from the panel, and the black wire is ground, the red wire is 26v and the other two wires appear to be a data bus of some sort, perhaps a I2C or a 485. The acid pump motor is a DC motor (has visible brushes) and a label that said 24 volts, and as I said above, when...

We bought our house (with pool!) in Orange County, CA in 1977 and we still own it. The pool was installed by a previous owner in 1975. We did a major remodel in 2012 (installed dual drains in pool and spa, pebbletec surface, saltwater, all new Pentair equipment, new decks, Zodiac MX80, etc.). I...

I just experienced a failure of a Pentair Intelliph (acid dispenser) control board, and I plan on replacing it with a home-brewed "Arduino" microcontroller-based board. Two diodes, D3 and D4 appeared fried on the native board. I don't know their function, but they may be supplying DC power to...