Wobblycogs Workshop

Category: Electronics

  • LED Array Lamp Part 5

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    In the previous a part of this series I gave an overview of the lamp. In this part I’ll get to the point where it’s possible to write to the LED’s. This won’t be the final form of the LED but it’ll be good for testing that it’s electrically correct. Installing Additional Software The plan…

  • LED Array Lamp Part 4

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    I’m going to start this article with photographs of the built lamp as there’s no way I’m taking it apart again for continuity. I think it’s also useful to see that it’s almost identical to what I showed at the end of the previous part. These are the interesting bits, towards the bottom left there’s…

  • LED Array Lamp Part 3

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    In part 2 I got just a handful of LED’s running directly from the Raspberry Pi. That’s a little bit risky so in this article I’ll look at some other options for powering the LED’s. Firstly… It bugged me that the pixels would keep displaying the last state when I shut the application down (killed…

  • LED Array Lamp Part 2

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    As I mentioned at the end of the last part of this series I got the lamp to the point where it was built and I’d started testing but then gave up on the project. At this point I can’t even remember how to light one of the LED’s from the Pi so it’s time…

  • Yeti – Electrical Terms

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    While designing the electictrical system for Yeti I came across a whole host of thing that I didn’t understand from pull-up resitor to PNP. Guessing I probably wasn’t alone in this I thought I’d document at least some of them here. Keep in mind that I’m not an electrical engineer so this may not be…

  • Build a Game Steering Wheel Using an Arduino – Part 3

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    In part 2 of this series I built the circuit that I’ll be using for my controller based around an Arduino Pro Micro. In this part I’ll configure the driving simulation game Dirt 3 so that it works with the controller.

  • Build a Game Steering Wheel Using an Arduino – Part 2

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    In part 1 of this series on building a gaming steering wheel from an Arduino I installed and tested the library that I’ll be using. In this part I build and test the circuit that the controller will use. I’m quite new to electronics and I thought this would be a challenge but it turned…

  • Build a Game Steering Wheel Using an Arduino – Part 1

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    Since I was a boy (which was a depressingly long time ago now) I’ve wanted to play a racing game using a steering wheel. I’ve played using a keyboard, mouse, joystick and game controller and they range from terrible to awful as controllers for driving. None have the control and accuracy that a steering wheel…

  • Workshop Lighting – Cable

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    Understanding Cable Markings Cable from a laptop power supply supplying 12Vdc at 2A over 1 meter. Text on the cable: E157914 PRIMAX RU AWM 1185 80 degC 300V VW-1 CSA LL110529 AWM I A/B 80 degC 300V 18AWG FT1 LM The text on the cable tells us a lot about the cable but most of…

  • Workshop Lighting – Power

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    Powering your LED lights is as simple as attaching a 12V power source and basking in their cold white glow. Powering your LED lights and getting the most out of them is a little harder though and will require some calculations and experimentation.

  • LED Lamp Projector Upgrade – Optoma HD70

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    Spurred on by my success with the cBright XG2 lamp bypass surgery I decided to have a go at doing the same for the Optoma HD70 I own. This projector is about 5 years younger than the XG2 and is native 720p so from my point of view this is a much more appealing conversion…

  • LED Array Lamp Part 1

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    I’ve wanted to play with individually addressable LED’s for ages and I’ve finally got around to buying some so it’s time to go it. For this project I’ve decided to build a 16×16 array of LED strips based around the common WS2812B chip. Power Since I’ll have a 16×16 array of LED’s the total count will…

  • Repairing a Numatic Henry Motor

    Repairing a Numatic Henry Motor

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    A couple of months ago the motor in my Numatic Henry vacuum cleaner died. At the time I was using it as a workshop dust extractor and it was connected to my belt sander. It was working moderately hard but nothing I wouldn’t expect it to be able to cope with. I hadn’t long replaced…

  • Building a Power Supply – Part 2

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    In the previous part I discussed most of the major components in the power supply. In this part I wrap up the discussion by talking about the smoothing capacitor and other components that will be needed.

  • Building a Power Supply – Part 1

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    In the previous part of this series I looked at the calculations needed to determine the current and voltage the stepper power supply should be built to provide. In this part I start to discuss the components that the power supply is built from. From the previous part we know that we need to provide…