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Current Flow Direction

Which way does Current Flow | AO #19

A couple of weeks ago I wrote about four current flow direction myths. As a follow up to that popular post, I decided to dedicate this month’s AddOhms electronics tutorial video to Current Flow. In episode #19, I tackle the question of which way does current flow.

You might have heard about “conventional flow” and “electron flow.” In conventional flow, we assume that current flows from the positive voltage towards the negative voltage. In digital, the “negative voltage” is usually called ground. However, that’s not how the electrons move nor is it how they carry the charge around a circuit path.

Electron flow is the description of how electrons carry a charge. Which is the negative voltage towards the positive? This confusion is a result of Ben Franklin mistakingly identifying how electrons moved so many years ago. Yet, we have kept the “positive” and “negative” labels as they are today.

The key though is that it doesn’t matter which method you use to analyze a circuit. Electrons move in a closed path. So whether they travel from positive to negative or from negative to positive, doesn’t matter!

AddOhms #19: Current Flow Direction

Check out the full AddOhms Electronics Video Tutorial on Which Way Does Current Flow on the AddOhms YouTube Channel.

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They’re JUST Capacitors?

I was invited to speak at the 11th Hardware Developers Didactic Galactic group at the Supplyframe office in San Francisco. I talked about the misconception that capacitors are a simple device.

Chris Gammell recorded the discussion and posted it via PHY Media. This video is about 50 minutes.

In this talk, I break down a few things to know about Ceramic, Aluminum, Tantalum, and Supercapacitors. You can see the full video via PHY Media’s YouTube Channel: They’re JUST Capacitors. For links and the slides, check out this post.

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The War On Science – AsapSCIENCE

The latest video from AsapSCIENCE, The War on Science, addresses the preverbal war between science and society we are experiencing today. 100, 200, or 1000+ years ago you could argue the ignorance of science was due to lack of information availability. However, that does not apply to today’s world. The entire World’s knowledge and the sum of collected data are available to virtually anyone, anywhere at any time. This moment isn’t just historical; it is pivotal. Yet. Society as a whole seems to continue the trend of ignoring this data in favor of emotional social media posts.

AsapSCIENCE’s take on the situation is spot on and worth not only the 5 minutes to watch but also sharing with the video everyone you know, and voting to support science, in your area.

Watch the The War on Science on YouTube.

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Build your own Ghostbusters Trap

Deck out the rest of your Ghostbuster gear with a Ghost Trap. Dustin McLean from DIY Prop Shop from AWE me builds a trap in this quick 12-minute video. The build uses very basic materials: cardboard, popsicle sticks, tape, PVC, and spray paint. Of course, the tools used are just basic cutting and straight edges.

If you aren’t familiar with DIY Prop Shop, the show–as the name suggests–takes a DIY approach to building famous movie props. Totally fun to watch and get ideas for your projects.

Check out the Ghost Trap Build on YouTube. Who you gonna call?

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