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This week the bald engineer unboxes swag from electromaker.io, programs the Adafruit Coin Accepter, with a Pyramiduino, and answers questions along the way. Interesting time code jump points: 7:59 – See Programming Bootloader Clip12:11 – Coin Acceptor Programming18:00 – Pulses on the R&S RTM3004 Oscilloscope42:05 – Code working as intended!

The primary tool I use to create AddOhms animations is Adobe After Effects. In this live stream, I take you through the process I use. For an upcoming video, I needed an animation showing how the Arduino Uno’s auto-reset circuit works. As you can see, what is on screen for a few minutes (at most) can take several hours of effort!

A common question that comes up about pull-up resistors: what value do you pick and why not just use a piece of wire? In this follow-up electronics tutorial, the bald engineer looks at how to pick pull-up resistor values. Show Notes Pull-Up Resistor Tutorial (Episode 15) AddOhms Discord Server Arduino Internal Pull-Up Resistor Tutorial (baldengineer.com) Chuck Norris On Pull-Up Resistors (baldengineer.com)

This video is part of a 3 part series, with the other two parts coming in the future. When it’s time to design a custom PCB for your project, you might be wondering how to design in an Arduino. This video shows the pieces that go into the schematic. The next video will show how to layout the PCB. And after the boards come back, I will show how to turn it on. Related Videos…

We take a look at EAGLE 9.0. This release was a major update since Autodesk took over the project. To help, I used a class I wrote for TechShop as a guide. In the end, I was happy to see the progress Autodesk has made. However, I’ll be sticking to KiCad.

Part two of the DIY Arduino series. In this video, we create the PCB. Also, the project gets a new name: Pyramiduino. Watch the process to make a PCB in KiCad. And the Bald Engineer gives you a challenge, can you find the unconnected nets before he does? Check out Part 1 – the Schematic and subscribe to see when Part 3 – Turn On is posted. DIY Arduino PCB in KiCad Show Notes Pyramiduino…

To be upfront, I am not a subscriber anymore. The owner of the company has a history of berating customers on Twitter. So, I just cannot support them anymore. I’d recommend you look at Adafruit’s AdaBox instead.

Previously, we looked at resistor voltage dividers. Sometimes I get questions about using these instead of regulators. In this video, I show why that doesn’t work. In fact, I go one step further and show that Zener regulators do not work either. Voltage Divider as a Regulator Show Notes Other videos to watch #13: Voltage Dividers 7 #7: Comparing Uno to Pi 4 #17: Linear Regulators 3 Links Zener Diode makes for a lousy regulator…

Another kind of motor is the BLDC. Otherwise known as the Brushless DC Motor. Unlike the motors we talked about in #20, a BLDC has no commutation ring or brushes. This means no sparks, longer life, and very fast RPMs. Commutation is done electrically. In this video, we show the inside of a BLDC and show two ways to control one.

My new laser cutter didn’t seem to work. I tried all of the usual troubleshooting steps. Then, I got the idea to use a special kind of tool. Behind the scenes All of the sound effects you hear are ones that I added: “in post.” The footsteps, the laser cutter, and (obviously) the lightsaber were all recorded separately. I used the Adobe After Effects plugin Saber from Video Copilots to do the glow. If you…