The Sensaura Project

The reason things have been quiet on this site for the past few months is because I have been working on putting together a new project called Sensaura - a scalable and extensible platform for building and deploying wireless sensors. This post provides and introduction to the goals of the…

ARM Based Sensor Nodes

One idea I have had in the back of my mind for a long time is a framework for small, low power wireless sensors that are easy to build up and deploy around the house and garden. Some of my first experiments were based around an ATmega CPU and the…

CNC Updates

It has been a long time since the last post but I certainly haven't been idle in the Lab. Most of my time has been spent working on my larger CNC machine (a CN3020T) including a number of control board redesigns and fine tuning a PCB milling workflow. In my…

A Simple CNC Machine - Part 3

Another update on my mini-CNC project - progress has been a little slower than I hoped for but I've reached an important milestone now - moving motors! As you can see there are some issues with the precision of the movement - each of those moves is supposed to be…

A Simple CNC Machine - Part 2

In this second post about my small CNC machine I walk through the process of etching a PCB and building up the controller circuit. The board layout I came up with is shown above - there are more jumper wires than I would have liked and it is not exactly…

A Simple CNC Machine - Part 1

I have been trying to get a replacement CNC controller board up and running for a few months now - fighting with LinuxCNC and a cheap Chinese Blue Board controller I bought off eBay. Although I can get it basically operational - enough to cut simple shapes out of MDF…