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Step 2The Thermometer
I bought two of these Indoor/Outdoor thermometers about 10 years ago from home depot. I was always fascinated that the outside "thermometer" plugged in to the base unit with what looked like a standard audio plug. I always wondered if I could measure temperature by plugging this into a mic jack on a computer.
Turns out I probably could make it work, but it would be tricky. The plug is actually a 3/32" jack, instead of a 1/8 audio plug. This is the standard plug for cell phones for external mics. This presented a problem as I could not find any mic plugs in my piles of junk that were not surface mount. I had to buy a set form Radio Shack ($2), which added a major delay to the project (getting to a shack was not easy).
I took one unit apart before I suddenly realized how the who thing worked, it was a voltage divider! It was obvious once I thought about it. It made life very easy.
Turns out I probably could make it work, but it would be tricky. The plug is actually a 3/32" jack, instead of a 1/8 audio plug. This is the standard plug for cell phones for external mics. This presented a problem as I could not find any mic plugs in my piles of junk that were not surface mount. I had to buy a set form Radio Shack ($2), which added a major delay to the project (getting to a shack was not easy).
I took one unit apart before I suddenly realized how the who thing worked, it was a voltage divider! It was obvious once I thought about it. It made life very easy.
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