projects

Targa Bambina 2017

The Targa road rally is an exciting yearly event. It has presence in several countries, including Australia, New Zealand, Italy, and Canada. It is meant to take place on public roads, and is a great sport for spectators.

Targa Newfoundland runs the yearly event on the Island, and last year they introduced the Targa Bambina. The Bambina is a less intensive, shorter version of the full Targa. The entry fees and rules are adjusted to be more accessible, meaning you average hobbyist can get in on the excitement.

This year, I participated in the first ever Targa Newfoundland Bambina.

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Sunday, August 20th, 2017 car, life, projects No Comments

STEVE – New chassis, 3D printing, fresh electronics!

IMG_20151122_133544Plenty has happened since our last post, and most of it can be summarized with the following picture.

Yup, lots of wires. New body, too. With my 3D printer back in service, cases were printed for the electronics, along with new wheels all around. These new wheels add around an inch of ground clearance, and better off-road traction.

As well, the first shipment of new parts has arrived: a USB WiFi adapter, an ultrasonic range sensor, H-Bridge motor controller, 9-DOF IMU and a temperature probe.

There are a lot of really cool developments in this post; let’s dive in.

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Saturday, December 12th, 2015 3d printing, electronics, networking, software, steve No Comments

Meet STEVE

20151103_223737He may not look like much right now, but STEVE is an evolving project I’ve been wanting to start for quite some time. He is a robot, into which I will combine software, hardware, and mechanical design.

Currently STEVE is an AVR microcontroller and LM298 dual motor driver, strapped to a circa 1985 remote control car. Over the last few days, I began laying the foundation with serial communication, motor control, and power. In the next few weeks, I should receive the first order of parts to give STEVE senses.

Initial Sensors:20151103_223750

  • Ultrasonic range sensor
  • 9-Degrees-of-freedom Intertial Measurement Unit (with compass)
  • DS18B20 Temperature Sensor
  • USB WiFi Adapter
  • LM298 Motor Driver (a better unit)

Once progress is made with these first parts, I also plan on including these additional sensors:20151103_223743

  • GPS
  • Servo (to pivot ultrasonic range sensor)
  • Current Sensing
  • Webcam

This is a great wish list, but without the software to tie it all together, not very useful. Therefore, I’m assigning my Raspberry Pi 2 B+ as STEVE’s brain. My vision is for the Pi to do all the heavy processing such as navigating, making 20151103_223817decisions, and hosting the user interface for mission planning. That way, the AVR is only a hardware controller that manages Input/Output, and communicates bi-directionally with the Pi.

Snapchat-9001727698458437431

Over the last week the project has evolved very rapidly, and a new body is in the works. My 3D printer has some serious overtime coming up, as I begin designing and printing STEVE’s mechanical components. The ability to print new wheels, mounts, gears and body components is critical to the success of this project, and will also mean I can be very flexible with how everything is implemented.

I have a lot of freedom to do really cool things with this, and I look forward to posting regular updates on STEVE’s progress here!

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Sunday, November 8th, 2015 electronics, projects, software, steve No Comments

3D Printing, Engineering, Germany and more [Life Post]

8 months between posts is possibly a record on this site. That isn’t to say nothing interesting happened during all that time. Here is a quick recap to keep this site going:

Germany

This summer I studied German for 5 weeks in Germany. The entire trip was documented in great detail over here: danjoannis.com/heidelberg

Video Projects

A few videos have come out on my YouTube channel, some technical ones and a more artistic one to play with my new DSLR.

It seems someone made (another) viral video of their 3d printer playing the Imperial March, so here’s my take on it.

 3D Printing

I’ve been putting more time into my Ecksbot, and keeping it maintained and improving print quality. I’ve expanded my filament collection thanks to Matt Durr, and been doing some work with original creations.

CAM00093

Ikea Roller Blind Mounts

Last week I uploaded my first public design to Thingiverse – I hope to create and share more projects soon!

Tuesday, December 9th, 2014 3d printing, life, school No Comments

Homebrew Stereo Gainclone Amplifier

LM3886T/NOPB

LM3886T 68W Audio Amplifier (Newark)

In 2012, one of my posts were featured on Hackaday, a globally read and frequently updated aggregator of projects that modify, create, and otherwise hack. The traffic this garnered was enough to throw a couple 500 Server errors, but it also resulted in getting the attention of someone at Farnell/Newark.

I was contacted through the comments by a member of the Farnell team, who spent quite some time on my site and was “loving the content”. After further communications, he asked if I would be interested in reviewing products for them. Of course I said yes!

The question was, what would I review? After looking through some of their enormous catalog, I realized I’d rather create something out of the components I reviewed, and discovered the LM3886, a relatively inexpensive 68-watt audio amplifier. This is where the adventure began!

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Wednesday, April 9th, 2014 electronics, projects 2 Comments

Hacking a Laptop Battery – Increase Runtime

Do you have an old laptop whose battery struggles to reach 30 minutes? I used to.

An aftermarket 6-cell pack would have cost me around $40, which isn’t expensive, but the laptop was old (circa 2006) and not worth putting money into.  I happened to have a fair number of Lithium-Ion battery cells “lying around”, and decided to upgrade my pack, not just with new cells, but with more cells.

IMAG0680

This project was completed about a year ago, and I’m surprised I never posted it before!

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Wednesday, January 22nd, 2014 computers, electronics, projects 1 Comment

Repairing a Projector with Tinted and Washed-Out Display

My employer came to me with a little project. The office projector stopped working properly after someone touched the pins of the VGA video cable, and presumably released ESD energy into the projector. The picture’s colours were all tinted and washed out!

Before

Note that the bottom monitor is displaying the same colour pattern
as the projector. Grey is completely missing!

He asked me if I’d like to take a look at it. My answer, as would be expected, was “of course!”

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Sunday, February 24th, 2013 electronics, projects, work No Comments

Adding Magnet Feature to a Bally Centaur

Hold SpotBally’s Centaur pinball machine came from the factory with an electromagnet, installed in the top-right corner of the playfield. It would hold the ball in place after it hit the “release” target, which initiates the multi-ball mode.

Unfortunately, as time passed and these electromagnets burnt out, it became more difficult and expensive to find a replacement magnet. Most games no longer have the magnet installed, as it was likely removed to be sold.

On our machine, we had no idea if the magnet was still there, and one day decided to look under the playfield to see if there was one. It turns out there was, but it didn’t work.

Magnet Close

After verifying the electrical side was fine, we took out the magnet to find that a screw had gone through the playfield, and through the coil!

Screw Through Playfield       Original

The price of a replacement electromagnet is upwards of $100! Thus, we decided we would remove the old coil wire and wrap our own. After all, how hard could it be?

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Saturday, January 26th, 2013 electronics, pinball, projects 4 Comments

Custom Car Bluetooth Receiver

Currently my phone is simply connected to my radio’s AUX input with a cable, and if I want to change songs I must do so from the phone. Modern raidos have integrated Bluetooth capabilities, allowing you to pair your radio to your phone wirelessly. In some cases, pausing and skipping tracks can be done directly from the radio’s buttons – safer than waking up and unlocking your phone to change songs within the music player app.

jvcradio

I could have purchased such a radio, but I already had a perfectly fine JVC unit I installed not even two years ago. It has two AUX inputs, the one in the front I’ve been using, and a special Bluetooth AUX input in the rear. Although designed for use with a JVC accessory, I decided to build my own Bluetooth receiver for my car.

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Friday, December 21st, 2012 car, electronics, projects 2 Comments

Quick Flip Fix

After a weekend at the Ottawa Pinball and Gameroom Show ’12, I came home to find that one of my Flip HD video cameras had stopped powering on. It functioned without problem when connected to the computer to copy the videos from it, but it would not turn on to record.

Today, I finally decided to open it up and figure out the cause. I suspected perhaps the power switch was bad, since it didn’t seem to be a major system failure. When I opened it up, the problem was as clear as day:

As you can see, something isn’t sitting quite right. One of the diodes became un-soldered, perhaps due to a shock, causing an already cracked solder joint to completely give up.

Simple enough to fix, a quick test with a multimeter, two points of solder, and everything was back to normal.

You never know if a task will be easy or difficult without first taking a look.

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Thursday, October 18th, 2012 electronics, projects, video No Comments