Posted December 22, 2011 by Chris

Today’s article shows you how to build a basic wireless input and output system in the form of a single transmitter and single receiver. Communication is one way to keep things simple with two xbee modules being used for the wireless link. In the end, a small trimpot will control the movement of a servo motor.

Posted December 21, 2011 by Chris

“This project is based on obdev’s RemoteSensor and their firmware only USB implementation, the main change is the replacement of the analog sensors with a SHT11 digital temperature and humidity sensor. The sensor unit consists of an ATTiny45 MCU, a SHT11 sensor, and a hoperf RFM12 868 MHz transceiver module. It is powered by 2 AA cells and is expected to give >1 year of battery life.”

Posted December 3, 2011 by Chris

“The main purpose is to gather water level data, store it in central database and view it on a web interface. This system can greatly reduce the effect of sudden water level increases due to rain, causing floods. Also, it minimizes the man power requirement to measure water levels in the reservoirs in distant areas.”

Posted November 16, 2011 by Chris

“RDS? It’s an abbreviation for Radio Data System. RDS is a European standard for sending small amounts of digital information using conventional FM radio…..To understand the RDS digital format I need to play with it. That is easier to do in C++ than with PIC assembler. I’ll use a 16F84 PIC as an interface. RDS data are sent serially to a PC com port for further investigation.”

Posted October 3, 2011 by Chris

“Using the super awesome TouchOSC app for the iPhone connected to Processing for converting Open Sound Control signals into serial commands send out via USB to an Xbee…I am able to drive a small tank.”

Posted October 2, 2011 by Chris

“After visiting some web pages about 2.4 GHz ISM band spectrum analyzers based on the CYWM6935 module, I tried to build my own analyzer, but with some improvements. The references I found on the net used the parallel port or a serial link to a host computer. I want the analyzer to be portable, and easy to transport, so I will use a microcontroller and a graphical LCD.”

Posted September 10, 2011 by Chris

If you’re an avid arduino fan, then this project should expand your design capabilities. It shows you how to use Xbee wireless modules to program the arduino without connecting it to your computer. The Xbee modules are very much self contained so there isn’t much additional work to implement the wireless communication. Check the article for a detailed explanation of how to make it work.

Posted August 18, 2011 by Chris

This article talks about a guy who got fed up with waiting for his car’s heater to kick in and wanted to get things working remotely. The setup uses a cell phone to remotely start his car using quite a few mods and the gsm auto module. All the details are there, along with a demo vid of the project in action.

Posted August 10, 2011 by Chris

It might seem like overkill and it is, but here’s a t-shirt that lets you know how many new e-mails you have waiting in your inbox. The system is designed using the Lilypad ‘clothing mod’ technology and some off the shelf wireless modules.

Posted August 8, 2011 by Chris

Another quad-copter article with a twist: this one is purely open source with extraordinary documentation, both hardware and software. The next gen multicopter is a remote control quad copter designed for the DIY crowd to duplicate on their own. Hardware and software are documented for you to modify, recreate or learn from.