Transistors as Digital Switches: Intro to Logic Gates

Circuits that really count

Operation in Saturation and Cutoff

Binary/Digital Representation

Digital “1” = +5 V = high

Digital “0” = 0 V = low

Inverter (NOT logic gate)

NAND gate

Design an OR gate

A B Y

0 0 0

1 0 1

0 1 1

1 1 1

NOR gate

Exclusive OR (XOR)

Logic Gate Library

Digital combos

Green LED illuminates when proper code is entered. Ready, set crack the code!

Teddy KGB’s Oreos Stash

And now, your joke of the day

There are only 10 types of people in the world. Those who understand binary, and those who don’t.

Images and Data From:

http://www.spsu.edu/cs/faculty/bbrown/web_lectures/transistors/

http://pcbheaven.com/scripts/imagepresent.php?filename=%2Fwikipages%2Fimages%2Ftransistorcircuits_1235488532.jpg

http://cpuville.com/logic_gates.htm

http://thalia.spec.gmu.edu/~pparis/classes/notes_101/node115.html

http://www.cs.uakron.edu/~margush/465/03_digitallevel.html

http://faculty.kfupm.edu.sa/COE/ashraf/RichFilesTeaching/COE022_200/Chapter4_1.htm