Normally, a programmer would use multithreading in order to overcome the long wait times associated with I/O tasks like printing to an LCD screen. The Uno doesn't support multithreading, but a quick google search brings up this article as a good starting point.

As far as I know, most Arduino servo shields communicate using I2C, and none of the Phidgets InterfaceKits have support for communicating with I2C devices. You'll either have to get a Phidgets servo controller, or get an Arduino and shield. If you decide to use Phidgets, you can download some servo ...

Try letting the probe soak in the buffer solution overnight. We've had issues with using these probes right out of the box without soaking them.

Yes, that is the correct use of the formula. Have you tried measuring the ORP of a calibration fluid with a known ORP to see how far off the probe is? Also, if there are electrical components like pumps running in the pool it could be causing interference.

I've heard of people having problems getting consistent values out of membrane pots. I suspect if you were to use a multimeter to measure the resistance, you'd get similar drift characteristics. I'm also a bit confused about how you have it hooked up. From what I've seen online, the SoftPot potentio...

That diagram is misleading; the 5V and ground are just there to emphasize that all of the things connected to the upper end are at 5V potential and everything at the bottom is at ground. When you say you're seeing a few mV/V of "drift", do you mean it's constantly drifting in one direction...

After a quick search of that website, you can find the article linked here instead:

http://www.eetimes.com/document.asp?doc_id=1276511

From the C/C++ API : int CPhidgetStepper_setCurrentLimit (CPhidgetStepperHandle phid, int index, double limit) Sets the current limit for a motor. int CPhidgetStepper_getCurrent (CPhidgetStepperHandle phid, int index, double *current) Gets the current current draw for a motor. The CurrentLimit sets ...

It is already mentioned in the getting started guide, at the beginning of the Debian Linux section. I can see how it could be easily missed, though.