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The Western Center Academy is a STEM Charter in Hemet, CA. Our high school students take a course called "STEM Studio" in which they first build a project from Instructables, then they create a project to upload to Instructables, and then they work on a long-term STEM project that they are passionate about. On this page are their Instructable uploads.
wcamammoths's instructables
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- wcamammoths commented on tanner_tech's instructable Industrial Isolation Transformer From Trash
- wcamammoths commented on seamster's instructable Tennis Balls in a Bottle (How-to!)
View Instructable »It wouldn't work. To calculate expansion/compression, you must use the kelvin temperature scale. Room temperature is about 300k and your freezer is about 270k, so the ball would only be 10 percent smaller.
- wcamammoths posted an instructable 1000 mw Laser Engraver Below $100
You're right that the output voltage is still lethal. But the input was lethal if you just touch hot wire and ground. Output is only lethal if you somehow touch both output wires from the transformer. So, it went from lethal if you touch one wire to lethal only if you touch both wires. That's not bad for such a small investment. In the image below, a) is isolated and b) is not.