Posted October 6, 2014 by Chris

"On the transmit side, I’m having a an ATMEL AVR microcontroller (ATMega48) transmit data (every number from 0 to 200 over and over) wirelessly using 433mhz wireless modules. The PC receives the data through the microphone port of a sound card, and a cross-platform Python script I wrote decodes the data from the audio and graphs it on the screen."

Posted October 5, 2014 by Chris

"An electric unicycle works on the same principles as a Segway but with only one wheel. When it senses that it is falling forward it moves the wheel in that direction to prevent the fall and vice versa for the other direction. Unlike a Segway, lateral balancing is the responsibility of the rider, so the prototype will have two wheels to compensate for this."

Posted October 4, 2014 by Chris

"This is a project that’s been in the back of my mind for a long time but I just never seemed to find the time to build it. When I saw the new ATX Breakout Board by Dangerous Prototypes, I was inspired to get the project started."

Posted October 1, 2014 by Chris

"After half a lifetime of dreaming about it, I’ve finally started building a robot. It’s based on a remote controlled tank, an Android mobile phone and a IOIO board which connects the two via USB."

Posted September 30, 2014 by Chris

"A real-time Spectrum Analyzer, with due credit to ‘deif’ on the Arduino forum for making Tom Roberts’ simple 8-bit FFT implementation available. On the above display you can see a typical ‘power spectrum’, with one dominant frequency plus harmonics at fixed intervals."

Posted September 29, 2014 by Chris

"Sound seemed to be the logical choice, and google led me to some basic circuits for triggering flashes with sound, but I wanted to be able to control the delay and sensitivity and have different modes and functions. Thanks to LMR I new the solution. Microcontroller! So I started boarding and building."

Posted September 28, 2014 by Chris

"Inspired by Andre’ Michelle’s Tone Matrix flash applet I decided to make a physical version – i.e. a box with buttons, flashing lights and knobs to turn. I wanted 16×16 – the Bliptronic 5000 just doesn’t have enough lights."

Posted September 26, 2014 by Chris

"At times we come across applications or situations wherein we need to generate square waves with the microcontroller. The square wave can be generated by programming a pin which toggles between 0 and 1 with a certain time delay. Alternatively, the inbuilt feature of AVR timers can be used in square wave generation."

Posted September 24, 2014 by Chris

"Lately I was busy in the hardware design of a personal robot named Chippu. It is an open source project and runs ROS, the same powerful code framework that runs on many robots like PR2. It is made as economical as possible. At present there is no on-board processing and it is done in a remote computer."

Posted September 22, 2014 by Chris

"Advancements in Javascript, node.js, have simplified communication between robot and user. Using two choice nodejs libraries, socket.io and johnny-five, you can quickly put together a system to control a robot using a web browser."