Yearly Archives: 2013

Transistor Based Level Shifter

One of the simplest designs I’ve found for level shifting is just tying 2 NOT gates together. The nice thing about a NOT gate is it can be made with a single transistor, which means we can make a level

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Dual DPDT Relay Motor Driver

I’ve been (very) slowly working on a tank track robot in my spare time. I didn’t want to use an off-the-shelf motor driver so I made this bad boy… This design uses 4 MOSFETs (IRLD014), 4 resistors and 8 diodes.

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Azure Blob Name Restriction Solution

If you’ve worked with Azure blob storage you know how awfully restricting the names are. They can only have the following characters: a-z 0-9 – (dash) I may have missed a couple other characters but as you can see it is INCREDIBLY

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Large LED Matrix Display – Part 2 (Driver Board Fabrication)

More work done on the LED Display! This weekend I got the first of many (and by many I mean 160) LED driver boards. This board will eventually drive 8 of the 1280 LEDs on the final sign. Here are

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AVR 10-pin/6-pin Header Converter

I’ve been using a parallel port programmer (Printer Port) to program my AVRs since I started using them. I’ve had to keep a slow old computer around just to program my AVRs since most new computers don’t even have parallel

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Homemade Stir Plate

We needed a stir plate for empowering our yeast for homebrew. It probably took us about 1 hour of actual work to get this little beauty made. Bill of Materials: 1 Metal Bar (Stir Rod) 1 Beaker 1 PC Fan

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Raspberry Pi Project Ideas

I just ordered my Raspberry Pi Model B! In 3-4 days I’ll have a new project. Only, I bought it without a project idea… Care to throw some ideas my way?   Edit (May 12, 2013) – I figured out

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Laminator Modification Guide – Apache AL13P

Pulsar recommended using this specific laminator when using their products. I just got mine delivered a few hours ago and made the modifications as Pulsar suggested. Pulsar provided pretty good instructions but I thought they could use some pictures so

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Large LED Matrix Display – Part 1

I’ve wanted a digital marquee for a long time. The kind you see at some gas stations or grocery stores that say simple messages like “Have a nice day!”. They tend to be pretty expensive for something pretty small. I

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Homemade PCB Fabrication

I’m going to put this guide up mostly for myself so I can repeat my successful PCB fabrication. I’ll try to update this with links to sites for each product and pictures of my going through the process the next

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