# Beginning Embedded Electronics - 1

Posted on Feb 6, 2014

This is a series of lectures written for those with mild electronics background (aka Sophomore in Electrical and Computer Engineering) to learn about the wild world of Embedded Electronics. I assume only that you know what electricity is and that you`ve touched an electrical component. Everything else is spelled out as much as possible. There is q

uite a lot here so take your time! It is also my intention to get book-hardened EE`s students to put down the calculator and to plug in an LED. Remember, if it smokes, at least you learned what not to do next time! Sorry for the confusion. When these tutorials were written and photographed, we used the ATmega8. We now carry the newer ATmega328. You will find all ATmega328 information in the following pages, but the pictures will show an ATmega8. You may know what an OR gate is. An OR gate is a logic gate that takes two inputs and controls an output. You may have played with these types of gates, even possibly a DIP packaged OR gate with 4 OR gates built into it. This DIP package required a power pin and a ground pin. Electricity flowed through the IC and allowed it to operate. You may not be sure how the IC was built, but you understand that if you change the inputs, the output changes. You can do this by tying the inputs to either power (also known as VCC) or ground (GND). You probably played with one of the DIP ICs in a breadboard. If any of this is completely alien to you, don`t fret! We`ll try to ease you into it. A microcontroller is the same as an OR gate. You have some inputs, you have outputs. The crazy thing is that a micro runs code. Machine code to be specific. For instance, with a little bit of work, you can monitor the input of two pins A and B. And based on those inputs, you can control an output pin C. So to...

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