Let's Make Robots!

Strange problem when saving data to SD card

I am using an Arduino Mega 2560 equivalent controller to read a G-code file received by an Xbee on serial port 2. The file needs to be saved onto an SD card until the machine is ready to process the data.

For this test I am using the Tera Term VT software to send and receive data over the Xbee modules on serial port 2 and the USB cable to upload code and debug. The code was written using Arduino 1.0.6 but i have also tested in Arduino 1.0.4 with the same results.

Precision control of 2 DC brushed motors using encoders
Perhaps the most common part needed to build a robot is a motor controller and usually the first complaint from beginers is that the robot does not travel in a … Read more
Introduction: This is a project I've been thinking about for a long time. I built the hardware some time ago but never had time to put the beacons into use. The … Read more
This is a robot I made for my son Shi Sen over the Christmas holidays. Some of the blocks are original K'nex blocks I brought with me from Australia. The other half … Read more
The Scamper chassis can move in any direction and each motor has a high resolution encoder so it should make an ideal painting robot. Think mobile dotmatrix … Read more

Mini Driver Mk II - S4A compatible

For some time now I've been wanting to release a new version of the Mini Driver with the ATmega328P. Then the Boss asked me if our controllers were S4A compatible (Scratch 4 Arduino). Now we do!

Video of Doodle Bot using this board can be seen here: https://www.youtube.com/watch?v=j95dTWg2-d0
Click on the picture for a larger image. Check out the features listed below!

This tutorial is still under contruction so please check weekly for updates. I have taken it out of "Draft Mode" because it has a lot of useful information for … Read more

ComMotion Shield in action!

Some time ago I built my Scamper robot to test / demonstrate DAGU's new Omni wheels with rubber rollers. Later I remade Scamper into a kit and combined the two Mini Drivers into a single PCB called ComMotion.

I was making something with toothed pulley belts when BDK6 mentioned them. I decided to see if I could use some toothed pulley belts to make a harmonic drive … Read more

Large robot chassis with 50W MP3 player

Dagu is now selling the chassis for our Venus robot as a separate product for $435 USD.
Please note there is a discount for people who log in and an additional discount for LMR members.

This is an ideal chassis for anyone who wants to make a large butler robot. It is an aluminium chassis with 2x 200mm (8 inch) drive wheels with rubber tires plus 4x caster wheels for stability.