Thanks, AC, for the information you provided. I have quite a number of those same sensors purchased, perhaps, from the same source. I will look into Travis’ logger board. It’s somewhat less expensive than the one I’ve been wanting made by EME Systems in Berkeley, CA. That one is called the OWL2pe data logger and can be seen at
New elfOWL data logger, OEM BASIC Stamp pe. The OWL is considerably more expensive, but it appears that it comes with a serial port or at least the capability. I think you can use your spreadsheet application to do the data smoothing automatically, if you want. I’m very impressed with what you’re doing, and a bit envious. I hope you’ll keep posting data as you log it. mm