Tag Archives: diy

Taking the DIY E-Bike Off-Road (and into the water)

There have been a few questions about this ~300w ebike and the places it can go.  I try to address some of those through experimentation in this video.

Among the tests done, I go over a few speed bumps, jump the curb, zip through some uneven grass, displace some sand, and hit the waves. All on two wheels.

Continue reading Taking the DIY E-Bike Off-Road (and into the water)

Hard Drive Solenoid Engine With Trinket

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Solenoid engines are nothing new, though they still seem to be a fairly common project among the curious. Using a hard drive makes such a project much more simple and straight forward, that is if you want to keep it that way.

This solenoid engine uses a software control loop (code below) running on a 16MHz Adafruit Trinket to adjust its speed. The program specifically alternates between a modest 180RPM to a smashing 3000RPM every five or ten seconds! Watch the video below!

Continue reading Hard Drive Solenoid Engine With Trinket

Simple Servo Tilt Gimbal for Rev. III Tricopter (and others)

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Want to add a degree motion to your GoPro camera without a bulky gimbal? If so, here’s a simple DIY add-on for your multicopter that may only take you a couple minutes to build.

All you’ll need is a spare servo, a 25mm M5 bolt with nyloc nut (for GoPro mount), some double sided foam tape or equivalent, and some other small vitamins.

Continue reading Simple Servo Tilt Gimbal for Rev. III Tricopter (and others)

5 Minute SLA to LiPo Battery Conversion for the DIY Electric Bicycle (Video)

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I pulled a couple 4Ah 3S LiPos from my tricopter’s stash and soldered together a little series adapter to give me an effective 4Ah 6S LiPo pack. The effective range has been cut in half to around 5miles compared to the original 13lb 10Ah SLA pack, but that’s still plenty enough to get someone around a college campus.

Click here to read more about how to build the DIY electric bicycle.

Here’s a video of the updated e-bike taking a quick spin around the block: Be sure to continue reading after the break for more info.

Continue reading 5 Minute SLA to LiPo Battery Conversion for the DIY Electric Bicycle (Video)

The electromechanical relay clock project is complete!

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CLICK HERE TO VIEW THE PROJECT WRITEUP!

After years of waiting to find the right hardware, I have finally found the time and the opportunity to build my own digital mechanical clock that uses absolutely no transistors or ICs. Its technology is reminiscent of the early relay computers from many decades ago. It uses 67 relays arranged in such a way to create 21 identical flip-flop logic circuits.

Continue reading The electromechanical relay clock project is complete!

Using the Arduino AJAX Webcam to Monitor and Control Your 3D Printer

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It’s a simple idea. Just modify the source code from our Arduino IP Webcam project page and add an additional set of AJAX response lines that toggle a couple IO pins on the Arduino. You can have these pins go directly to some headers on your 3D printer and/or to an inline power-switch tail that you can toggle in the event of a problem. All the while monitoring your 3D printer visually with a live image feed from anywhere on the World Wide Web.

Heck, while you’re at it, you might as well add some remote controlled lighting, and a relay shield. Your only limit is your imagination RAM. Check out this simple user interface:

Continue reading Using the Arduino AJAX Webcam to Monitor and Control Your 3D Printer

Obscure vibration dampener material tests for the Rev. III Tricopter

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Over these past few months, I have slowly been testing out various materials for absorbing vibrations in the Revision III tricopter. The goal was to eliminate the rolling-shutter effect (or jello-effect) from aerial video as much as possible.

If you don’t already know, this tricopter has its battery and camera equipment suspended from the main frame with three zip-ties. Dampening materiel is loosely compressed or adheared between these two subassemblies and is ultimately responsible for most of the physical vibration isolation. Usually this materiel is rolled into three separate ~1″ long by ~5/8″ wide cylinders and stuck between each of the three zip-tie loops.

Among the materials I have tested include vinyl furniture bumpons, Sugru blocks, double sided foam (vinyl) adhesive, and latex foams among other things. Most worked pretty well, but others were hard to come by or showed poor performance.

Here is a short list of my findings presented in a general order with the best (so far) near the top. Continue reading Obscure vibration dampener material tests for the Rev. III Tricopter

Tricopter Build Log part three

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It’s alive! The tricopter went under a few more revisions and prints before finally taking to the air. My old Rev One Quadcopter has been reduced to it’s (over-engineered) frame and nothing more. Its parts (motors, ESCs, batteries, Crius AIO, etc.) have moved on to become this very tricopter.

Currently (in the picture) it is set up to fly FPV sans-GoPro. There is an optional part available to replace the camera pan/tilt servo mount/hole with an alternative “use-what-you-want” vibration-dampened plate.

Keep reading for a couple closeups and highlights of the tricopter.

Continue reading Tricopter Build Log part three

Introducing the Trinket Auto Greeter

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What’s cracking?  (an actual response from TAG)

After winning the Adafruit/Hack a Day Trinket contest I had to decide what to do with my new Trinket microcontroller. A few weeks went by before I came across this universal foot switch. With plenty of space inside it was just begging to be part of a new Trinket project. One thing led to another and then I realized that I am terrible when it comes to over-thinking the headings and greetings to my emails and other messages .

Thus came the Trinket Auto Greeter, or TAG for short; it types out a random greeting from a list at the push of a button. The code has been made available on the project page for anyone to use or edit.