Audio Amplifier - 2N3055 MJ2955

Here is A amplifier with 2n3055 transistors on its output for those of you that are looking at doing a bang for buck amplifier with all those 2n3055 lieing around that as most electronics guys think when they look in there old box there must be something I can do with this stuff.

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Make a solar cell in your kitchen

A solar cell is a device for converting energy from the sun into electricity. The high-efficiency solar cells you can buy at Radio Shack and other stores are made from highly processed silicon, and require huge factories, high temperatures, vacuum equipment, and lots of money.
If we are willing to sacrifice efficiency for the ability to make our own solar cells in the kitchen out of materials from the neighborhood hardware store, we can demonstrate a working solar cell in about an hour.

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How to make the simplest electric motor - 2

Making a simple Motor out of an alkaline cell, neodymium disk magnet, copper wire and a drywall screw.

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A motor in 10 minutes

Back in the 1960's my father taught me how to make the little electric motor we will make here. Sometime in the 1980's I saw a description of it in the magazine "Physics Teacher". Lately I have seen it described as Beakman's motor, after the science oriented TV show on which it recently appeared.

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