If anything is being harvested maybe get a bunch cheap? Peas maybe, they taste so good fresh.
Or get down the coast and buy lobsta off the pier?
There's someone in Franklin Co. with a laser tag arena but I dunno if it's up and going yet.
Some time look on youtube for warping concrete. It's glass fiber reinforced (GFRC), they pour out flat shapes, wait for it to set a bit then bend the crete like you would steamed wood.Look a bit more into fiber-crete with wood shavings or paper pulp. If you like it, you might take it somewhere.
i also have to work on the Hall-Effect home/limit switches for my CNC, as well as devise a way to help support the Z-axis.~Travis
If you set the linear Hall sensor and magnet up and then slide a piece of steel (can metal will do) in between, it should read less to nothing.
If you can read the magnet through a hole in one piece of steel and slide another in to shut it off then you have diminished the sense area. I have no real idea of how small a hole can work.
If you move the magnet across the direction that the Hall sensor points, the read values should peak when they are directly across from each other as long as the magnet is pointing at the Hall switch right then.
Make yourself a Hall sensor wand and have fun probing magnets and EM fields. If you combine a magnet and Hall sensor then you should be able to detect moving non-magnetic metals. You can use the wand to detect EMF in your own projects.
You need a Linear Hall Sensor, not a Hall Switch. The Hall Effect is used in many different devices, just because it says Hall doesn't mean it's the Hall you want. For your limit switch, maybe good but for probing EM fields and finding out what's going on you'll want the linear sensor and probably some kind of sensitivity control circuit.
You might want the linear Hall finding where the magnet field is strongest as that may provide your best zero.
A linear Hall sensor has a direction along which it measures field strength. You get strength and direction. If you make a wand that points in the direction and lets you get the sensor away from your hand then you can find the invisible shape of the field.
You can get more precise stops with light and use the Hall or cap sense to tell the motor to slow down, fwiw.
With 2 slits and a red led you can probably get an interference pattern. That will gives bands of light to sense and if the distance from slits to sensor is small, the distance between bands will be smaller... you'd need to mask the sensor to see only narrow light or dark band alone. And no, you don't have to have a laser to do the double-slit experiment, it's just more clear with one.
I was steered away from optical (on CNCzone), as the router dust may obstruct the sensor, unless i build it into a sealed mechanical sensor that passes a vane through the sensor. seemed like hall would be easier to implement, of the non-mechanical sensors.