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AVR Programming Guides
We have some nice AVR code samples to share. Lots of AVR goodies like timers, interrupts, and pin I/O for the beginner. |
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Watts Tables
Use these tables to help you determine how much various items in your house cost you by the day, month, and year. |
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Saving Electricity
A list of a variety of ways to help you save money by learning how much it costs to run things. |
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Read Your Power Meter
By reading your power meter you can get a good idea of how much various electrical devices cost you. |
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Common Schematic Symbols Page 5
Switches
Switches are used to provide human or real world input into your project. They come in many different varieties. Here we will only talk about the most basic kind.
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This is a picture of a single pole switch. It has only 2 legs, and does not have a polarity. You can hook the switch up either way and it will work.
Transistors
Transistors are little electronic switches. They always have 3 legs, and are always polarized.
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Above is the schematic symbol for one type of transistor, and a few examples next to it. Understanding transistors takes a little bit of patience, but it is very important. They are the workhorse of most electronics projects. When you are ready to learn more, check out our Transistor Guide where we descibe how to identify which leg is which, and how to use transistors.
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