Home Projects AVR Programming Guides Electrical Fundamentals Insteon Saving Electricity
 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.
 Watts Tables Use these tables to help you determine how much various items in your house cost you by the day, month, and year.
 Saving Electricity A list of a variety of ways to help you save money by learning how much it costs to run things.
 What is a Kilowatt Hour Saving money on your electric bill starts with understanding what a kilowatt hour is.
 How To Measure Watts Learn a variety of ways to measure watts in your house.
 Read Your Power Meter By reading your power meter you can get a good idea of how much various electrical devices cost you.
 Electronics Fundamentals Learn some basic electronics fundamentals and see if you enjoy the field of electronics.

## How To Read Schematics Page 1

When we talk about electronics it is sometimes easier to use a picture to describe what we are talking about. Those pictures are called a schematic. A schematic is a picture representation of what we are talking about in electronics. They may look hard to read at first, but in time you'll find that they are usually easy to read. The hard part tends to be finding the parts that are represented in the drawing.

Lets look at a simple schematic, and learn to read what it says.

Above is a schematic of a battery hooked up to a light bulb. Here is what it looks like in real life.

We have used a standard Duracell 9V battery and a light bulb. Notice that the light bulb is on. Now we are going to hook up the light bulb the opposite way.

Notice that in the first picture the green wire went to the top area of the light bulb, and in the second picture the black wire went to the top area of the bulb. That is the only change.

See that the light is still on? That is because light bulbs do not care about which side of the battery they are connected to. Some devices do care. When that is the case, the schematic will indicate which way to hook the device up. We'll talk more about that later.

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#### Written by Jason Bauer

Jason Bauer is an owner and programmer for Portforward.com. He's allergic to twitter and facebook, but you can find more of his articles in the Guides section.
 Wednesday, 24-May-2017 00:44:20 PDT