Archive of Projects

Using the inductor tester Thumbnail

Using the inductor tester

Posted by ian.rees on May 21, 2016 in Projects tagged with , , , , , , ,

A few weeks back, we had a talk on KiCad (presentation available at http://ianrrees.github.io/KiCad_talk/ ) where we ordered some PCBs to make an inductor tester (Henryometer?) from dirty PCBs. Those boards came in this week, and a few folks have already put theirs together. This post aims to be a quick guide to the usage of the tester; if you'd like to build one yourself just let Ian know, parts cost is $15. You'll need an oscilloscope and a current-limited DC power supply to make use of it. Connections between the tester and oscilloscope are made via standard BNC coaxial cables (ava

Continue ReadingLeave a Comment
Debugging AVRs (without Atmel Studio) Thumbnail

Debugging AVRs (without Atmel Studio)

Posted by ian.rees on December 07, 2015 in Projects tagged with , , , , , , , ,

This post is somewhere between a guide and a collection of notes, aimed at debugging programs for AVR microcontrollers (like the ones in most Arduinos) "on target". We'll be using an AVR Dragon connected to the target micro via the normal 6-pin programming header, with a Mac or Linux PC as the host. Although this is a bit more advanced than most of our other projects, it's really quite approachable and is a very powerful technique for fixing AVR software problems. From a high level; we'll use a debugging program on a Mac (or Linux, Windows, etc) "host" computer, which communicates with a Dragon "In Circuit Emulator" (ICE) via USB to debug a buggy program running on the "target" AVR, which is presumably running in some circuit we're interested in. Small variations might apply for Windows hosts, using JTAG instead of DebugWIRE, other debugger tools (Atmel JTAGICE mkII for example), etc.

Continue ReadingLeave a Comment
Arduinos and Macs Thumbnail

Arduinos and Macs

Posted by ian.rees on August 08, 2015 in Projects tagged with , ,

This evening, I finally got around to unwrapping the Arduino clone that came with my DSpace membership. Starting a project for the board couldn't be easier, using the nice Arduino IDE from https://www.arduino.cc, but I ran into a little snag when it was time to upload the program onto the board. It turns out that these clone Arduinos use a newish low-cost USB to serial converter chip called a CH340G, rather than the FTDI brand chips used in the genuine Arduino boards. The CH340G that isn't supported by MacOS by default, and I use MacOS, so the board didn't show up in the Arduino application's list of serial ports... Fortunately, other folks have run into the same problem and have written up some nice blog posts on how to solve exactly this issue!

Continue ReadingLeave a Comment

Sourcing RepRap parts around Dunedin

Posted by Luke Easterbrook on October 31, 2013 in Projects tagged with

Things to note Don't get too hung up on bolt length. Get something longer than required and cut it down with a dremal or hacksaw. Some reprap parts lists don't include the extruder parts, so make sure you read what you need for those as well. Please add comments for other places you have bought stuff or for things I need to fix. Fasteners: (Nuts and bolts etc.) Get them from a fastener shop Hylton Parker fasteners EDL Fasteners You can also get stuff from Mitre 10 or Bunnings but it costs a bit more for some things and not everything is available. 8mm Threaded rod Can get them from a fastener shop such as Hylton Parker or EDL Comes in 1m length. You can also get it from Mitre 10 or Bunnings but it costs a bit more. Again 1m lengths 8mm Smooth rod Can get it from Mico Metals. They call it 'round rod' and it's actually 7.94mm which is fine. Cost is $26.30 incl. (Oct 20

Continue ReadingLeave a Comment
Beginner’s soldering Thumbnail

Beginner’s soldering

Posted by Paul Campbell on May 06, 2012 in Projects tagged with

A month ago we did some freeform soldering for beginners, this coming week we're going to repeat the board soldering night for beginners we did last year. Thursday this week May 10th is board soldering night - please bring along a soldering iron of you have one. Last year we built badges with an Arduino on it that could do blinky LEDs, they were hard to program though without a special cable and used expensive 3v batteries. This year we have a new add-on kit that rectifies those limitations of the badge kit - it includes a USB to serial converter and allows you to power your badge from your computer. The new "badge base" kit stacks underneath your existing badge and contains a lot of empty component locations ready for you to stuff them with enough other components (not included, but available locally in Dunedin) to build a simple robot You can find build instructions at  http://taniwha.

Continue ReadingLeave a Comment
Sediment Profile Imaging (SPI-Scan) Project Thumbnail

Sediment Profile Imaging (SPI-Scan) Project

Posted by Brian Paavo on April 14, 2012 in Projects tagged with , ,

Last year at the joint D-Space/DunLUG meeting I made  a brief presentation on one of my research projects - the SPI-Scan system.  Several of my first prototypes are currently being used by universities, government agencies, and private consultants domestically and internationally to monitor the ecological health and human impacts on  shallow coast environments, especially mariculture farms, coastal developments, and ocean discharges.  After receiving feedback I wanted to take the next model 'to the next level' and built most of the optical mechanical systems, but the heart of the new system lay in improved electronics and code.  Early this year I proposed a group D-Space project to achieve a few goals:  1) build a new system that incorporates open-hardware and open-source code, 2) challenges us as makers with real-world problems to help expand each of our skills, 3) provide much-needed f

Continue ReadingView Comments (5)
Bookscanner project Thumbnail

Bookscanner project

Posted by Reece Arnott on September 11, 2011 in Projects tagged with

Here are some notes on my book-scanner project, inspired by diybookscanner.org. This is a work in progress and will initially be a single large page and I'll probably update it and split it into a Lessons Learned (blind alleys, problems, workarounds and eventual solutions) section at some point. If you want something I haven't documented yet just email me: reece.arnott@gmail.com   Vision I am planning on building a book-scanner using 3d printed parts so that the design can be easily replicated in the near future when hobbyist 3d printing becomes more widespread. I want something that is cheap and relatively easy to put together and also so you don't have to accurately measure angles or lengths. Most of the people in the DIY book-scanner community at diybookscanner.org are using digital cameras (with either modified firmware or physical push-button devices to trigger the cameras simultane

Continue ReadingView Comments (7)
Electronic Badge project Thumbnail

Electronic Badge project

Posted by Blair McBride on February 05, 2011 in Projects tagged with ,

Today we sorted and bagged the components for the Electronic Badge project - 40 kits, ready for people to start building them. The (draft) build instructions are available here: http://www.taniwha.com/~paul/dspace.badge/

Continue ReadingView Comments (2)