Introduction to Digital Computers 3: Flip Flops

It’s been about a month, and here’s the third video explaining how computers work from the ground up.

In this third video I discuss flip flops. Starting with two not gates hooked together I discuss how a bi-stable circuit operates, extend this using NOR gates to Set/Reset flip flops, build data flip flops, edge-triggered data flip flops and 8 bit registers which can store up to 8 digit base-two numbers. I also talk a little bit about signal delays through transistor circuits, setup and hold times, and I also briefly introduce edge-triggered Set/Reset flip flops, J/K flip flops and T flip flops, as well as how to use them to build a counter.

All of this, of course, literally comes from the ground up, since everything can be built using 2N3904 transistors, a few LEDs, 330Ω and 10kΩ resistors, and a few switches to wire it all up.

My hope is to release subsequent videos about once a month, give or take.

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Published by

William Woody

I'm a software developer who has been writing code for over 30 years in everything from mobile to embedded to client/server. Now I tinker with stuff and occasionally help out someone with their startup.

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