RGB LED wireless light

Here is a post about what you can do in an afternoon or two with a whole load of electronics stuff lying around. I have had an red-green-blue (RGB) board from Big Clive or Phenoptix lying around for a while. I had developed an RGB LED controller for it, so I also had one of … more

Low Temperature LCD Displays

A couple of years ago I had accidentally purchased a batch of ‘low temperature’ 16 x 2 LCD displays. These do not work with the standard 5V supply as the contrast pin requires a negative voltage for the display to appear (around minus 1.6V seems to work well). This is a post on getting them … more

Using the Pi-LITEr

Having been to Derby Mini Maker Faire the previous day I had bought myself a very simple (and cheap) LED light add-on for the Raspberry Pi. This was called the Pi-LITEr. It is a plug-in PCB for the RPi GPIO (general purpose IO) pins. It has 8 LEDs on it. I have not played too … more

Reflow Oven Controller

This shows the build for a simple Arduino-based reflow oven controller. This converts a basic toaster oven into a temperature controlled reflow oven for making surface mount circuits. The temperature profile is read from a simple text file on an SD card. This makes changing the temperature profile very easy, without any new code to … more

Milling PCBs on a CNC

I have a small CNC machine which I mainly used for accurately drilling PCBs. I have done a few experiments on milling PCBs and also here (ie. taking a sheet of copper clad board and cutting away copper where it is not needed). I realised quite quickly that the bed of the CNC must be … more

I have created life!….

Ive been sorting out the workshop here and found a project that I started around 12 years ago. I thought I would finish it and make it do something fun. The project was an 8 x 8 LED grid. I used high brightness blue LEDs. I wanted it to display something interesting and varying. I … more

Bat Listener enclosure

I’ve been wanting to design a nice enclosure for the Bat Listener kit which I sell on-line and recently I found the time to build and test a prototype. I used laser-cut plywood and the slots and t-nut holder method, as shown here. I built in some additional segments to hold the battery and keep … more

Adaption project

Just to prove that I can be cultured and appreciate ‘the arts’, I thought I would post photos of an art project I have been involved with. Around two years ago I was asked to build the control system for an art installation called ‘Adaption’, by Becky and Katy Beinart. It has recently been installed … more

Graphing Data in Processing

Following on from my first forray into Processing, I needed to display some data in a simple graph, with time as the X axis and scaled data value as the Y axis. I thought I would post what I came up with here, as I think its quite nice (although perhaps not the best designed … more

Using Processing 2.0

I wanted to use the computer language ‘Processing’ to read data from a serial port and record the data. Here are my collected notes on doing this. Processing is an open-source programming language which has been designed to teach computer programming fundamentals through a visual environment. It is the basis of the language used for … more

Upgrading CNC milling machine

We use a CNC milling machine here in the workshop of RE-Innovation. It is used mainly to drill holes for prototype PCB production. We have also used it to cut out pieces for front plates and for enclosures. It has been out of action for a while as the spindle motor brushes failed and the … more

Power Meter Prototype

Just finished putting together a simple power display with a large LED output, so here is a quick post. This has been built using the new re-designed pedalog and three of the 7 segment LED boards.   … more