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Cheap PCB turns 10-pin AVR programmer to 6-pin
I’ve been using this cheap $4 AVR programmer to upload Arduino code to bare AVR chips. The only issue is that it uses the 10-pin programmer interface, which takes up a lot of PCB real estate on my...
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Floppy Music Thing
I made one of those floppy drive music things that I keep seeing online. It’s mostly standard based on existing info, but I did made two somewhat interesting changes. Read on for details. First, made...
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TerrorBytes Countdown Clock
The masses have spoken! After my wildly successful debut as a blog post writer, Tyler and I have collaborated to create a post so exciting that we may just increase our readership to tens of people!...
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The Pandaphone
I was looking for a gift for my friend’s son, who’s about a year old. I realized that everything I was looking at was just various enclosures with chips that made sound and light…that’s the kind of...
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Generating 3D-printable pieces directly from EAGLE PCB designs
NOTE: Everything involved in this post is available for download here. I while back, I made this PCB that acts as a big daisy-chainable two-digit 7-segment display using the WS2803D and discrete LEDs....
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How to make a ton of clear LEDs into diffuse LEDs
Step 1: Make a rock tumbler out of some threaded rods, bearings, a motor, and a spaghetti jar: Step 2: Get sand. If you don’t live in a beach/desert, you can probably get some for free from a...
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AC power control without touching AC power
In this article I’ll show a simple 3D design for a servo mount to control a light switch for about $3, plus some electronics to drive it with a neat little interface. This article explains how I used...
View ArticleDIY Hall Effect Tachometer
Magnet sensor (A3144’s) + magnets + spinny disc = tachometer. Here’s the quick and dirty code I used — it’s good enough for a demo. EDIT: Ha, I found a video of someone else doing the same thing, but...
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Little yellow robot in one day
The robotics team I mentor with, the TerrorBytes, decided to put on a robotics competition for local teams and guests: a one-quarter scale version of this years FIRST Robotics Competition game,...
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Introducing YellowBot_02
A long time ago I posted YellowBot, a little robot built in one day. I am now ready to introduce YellowBot_02. YellowBot_02 is a robot designed to compete in MiniFRC 2019, a quarter-scale version of...
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