When you need to use electricity to make something work such as a boom box, you’ve entered the world of electronic gadgets. No doubt you’re eager to start making your own electronic gadgets. We cover the basics of how electronics and gadgets interact in the following sections.
Creating A Simple Circuit
Take a battery a resistor an LED and some wires put them together and you have a simple electronic circuit. That’s all an electronic circuit is wires connecting components so that a current can flow through the components and back to the source.
Figure shows a simple circuit. You place the parts in this circuit also called components on something called a breadboard and connect those parts with wires. If you’ve ever played with Mr. Potato Head, you understand the principle of a breadboard. You stick things in the potato ears, a hat, eyes, and so on to form a potato person. In the same way, a breadboard has slots for you to insert electronic components to build a sample circuit. If you’re really happy with what you’ve created, you can then use that design to get a printed circuit board made.
Figure shows wires connected to both terminals of the battery in the circuit. This connection allows the current to flow from the battery, through the LED and other components, and back to the battery to complete the circuit. You can also complete the circuit by connecting parts of the circuit to the metal chassis of a gadget, such as the metal housing of a stereo. We call this connection a ground because it is used as the reference for all voltages in the circuit. Ground may or may not be connected to the actual earth, but it is always the reference from which you measure all other voltages.
Deciding What To Build
If you are eager to build a simple circuit to try out your skills then see example, you can create a breadboard circuit that sounds an alarm when someone turns on a light in your room. Building these projects is a fun way to get familiar with how to put together a circuit. After you’ve developed your skills building some of the projects, you can go farther.