I'm having to throw darts to find a solution to my situation. Maybe y'all will know of some options.
I currently have a wired Sigma 1009. This computer has been in use for ~20 months, logging 1,400+ hours. It is connected to a 12" diameter treadwheel for an African hedgehog. It has worked fabulously well. (I did have to double the wheel size to get a number that I could program, but I just halve the data to get average speed and whatnot. Once in a while, the data would be skewed on account of her not keeping enough speed to collect accurate data, but that was a fairly irregular occurrence.)
I have completed a prototype 18" diameter treadwheel. The larger size will be good for her. Initial testing indicates that Sophie will not turn this larger wheel at a high enough speed to collect reliable data. (This wheel is large enough that I don't have to fudge the programming.) Treadwheel construction has worked out very well. We have mounted an inline skate wheel to the body of the treadwheel, which mounts to a frame with a 1/4" bolt as a spindle / axle. Super-smooth action.
Problem #1 -- The Sigma 1009 auto-offs after 3 seconds. At lower speeds, she doesn't turn this larger wheel quickly enough. Manual testing indicates that she must be turning the wheel at a minimum speed of 1.2 mph for computer function to be smooth and reliable. Her nightly average speed is only about 1.35 mph.
Problem #2 -- Actual use testing shows some issues that I didn't have before, and I don't know what to make of them yet. She has been showing some good speeds, up around 1.6 mph, yet the computer is not recording average speed at all. The distance function seems fine.? That has thrown me a bit, but I am using the computer for 'off label purposes', so figure that it is connected to not being sensitive enough for low speed use when connected to a larger diameter wheel? (The wire is run through a small hole that we cut in the wall of her room, and passes into our living room, which lets us peek at her activity in real time.)
At any rate, I need a computer that will will auto-on and auto-off --- one with a longer timeout than the 3 seconds that the Sigma 1009 provides. It needs to be accurate at very low speeds, providing reliable data for average speed from around 0.7 to 2.0 mph. Distance calculation is less important, but accurate data for that would be nice.
She runs from 30 minutes a night to 2 1/2 hours, and averaging about 1 1/4 hours these days. The data is very useful for monitoring health.
Any ideas? Thoughts?