Posted by RayP(MI) on September 29, 2012 at 10:28:22 from (207.241.137.116):
Visited a high school classroom the other day, and found a paper with the following problen laying on one of the desks --- Got me stymied. Can you figure it out? Must be something I'm overlooking. (Only been into electronics for about 50 years - son with a brand new degree in computer engineering came up scratching too).
"Imagine two rooms, one with three switches and the other with three light bulbs. Each switch controls one of the light bulbs. However, because the light bulbs are in a different room, you can't see immediately which switch controls which light bulb.
Your task is to figure out which switch controls which light bulb. You can spend as much time as you like in the room with the light switches, but eventially you must go into the room with the light bulbs. Once you enter the room with the light bulbs, you can't return to the room with the light switches. What's more,after entering the the room with the bulbs, you have only thirty seconds to figure out which switch controls which bulb.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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