Ben Eater

If you want to learn more about how this computer works or how I built it, check out https://eater.net/8bit Buy a kit and build your own! https://eater.net/8bit/kits Support me on Patreon: https://www.patreon.com/beneater

In this video, I compare a simple C program with the compiled machine code of that program. Support me on Patreon: https://www.patreon.com/beneater

How does an LED respond as we apply different voltages? Support me on Patreon: https://www.patreon.com/beneater

How to calculate and use the right current limiting resistor with an LED. Support me on Patreon: https://www.patreon.com/beneater

Don't have a fancy laboratory power supply? Now that we have current flow under control, let's look at some simple low-cost ways to power our circuit. Support me on Patreon: https://www.patreon.com/beneater

We've been given a mystery voltage signal. Can we hook up an LED to see the signal? Support me on Patreon: https://www.patreon.com/beneater

Let's poke around with a multimeter to see if we can figure out why the LED is so dim. Support me on Patreon: https://www.patreon.com/beneater

Transistors amplify current. What does that even mean and how does it work? Support me on Patreon: https://www.patreon.com/beneater

Often times transistors act more like switches. Here we see why. Thinking of transistors in this way might make digital circuits easier to understand. Support me on Patreon: https://www.patreon.com/beneater

Enough talk about transistors. Let's hook one up and see if it solves the problem of not enough current. Support me on Patreon: https://www.patreon.com/beneater

If we hook the things up a little differently, instead showing us the signal, the LED shows us the opposite of the signal! Support me on Patreon: https://www.patreon.com/beneater

A closer look at the two transistor circuits we've seen so far. Support me on Patreon: https://www.patreon.com/beneater

Let's build a circuit that adds numbers! Binary addition is even easier than decimal addition since you don't have to know how to add numbers larger than 1. Support me on Patreon: https://www.patreon.com/beneater You can get all the components used in this video from any online electronic components distributor for a few dollars. Complete parts list: 2x 74LS86 (Quad two-input XOR gate) 2x 74LS08 (Quad two-input AND gate) 1x 74LS32 (Quad two-input OR gate) 2x 4-position DIP switch 5x LEDs 1x Solderless breadboard 22 gauge wire USB charger and cable or some other 5v power source

Support me on Patreon: https://www.patreon.com/beneater

A detailed look at semiconductor materials and diodes. Support me on Patreon: https://www.patreon.com/beneater

A detailed look at how an NPN bipolar junction transistor works and what it does. Support me on Patreon: https://www.patreon.com/beneater