Electric Imp Based WIFI Power Switch

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My quest for home automation has been slow but I have made some progress. The first thing I wanted to control was some of the lights in my apartment from my phone. WARNING: This project contains mains power which can be dangerous; beaware this project has not passed any safety compliance testing. I hold no […]

WiFi Temperature Sensor Testing Continued

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Continuing from my last post here about my Electric Imp based WiFi temperature sensor. I left my prototype sensor running for 14 days before it stopped transmitting which isn’t nearly the batter life I want out of this but as I said in my last post I was getting anywhere between 800uA and 2mA of current consumption […]

AC and DC Dummy Load

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I wanted a variable load for 24VAC that would go up to at least 12VA. Before I would connected power resistors in series but that gets troublesome when you want to change the load with a fine resolution. There are variable power resistors or rheostats but they are big and clumsy and from what I […]

Wifi Temperature Sensor Testing

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Like I said in my last post I’ve decided to rethink my wireless temperature sensor. Instead of using a local wireless protocol like ZigBee or the Nordic Semiconductor 2.4GHz wireless. I want to investigate using WiFi instead. After doing a bit or research I found the Electric Imp WiFi modules (Electric Imp) look like they […]

Wireless Temperature Sensor Rev 1.0

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Well in the past I had talked about wanting to do a big home automation project and to start with that I wanted to design a battery powered wireless sensor node that I could place around my apartment. The first iteration of this design was posted here http://andrewswanton.com/?p=780 but I had problems with the PIC24 microcontroller I […]

Wireless Temperature Sensor

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Since I am done with school I want to get back into doing some hobby electronics a project I posted about before was wanting to build a home automation system. This was to consist of multiple wireless sensors and IO points around my apartment controlled by one central server. To start this project up again I have designed a small battery powered temperature sensor. The […]

Capacitive Touch Business Card

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  I wrote a post about my design for a capactitive touch business card a few months ago but I have finally had time to build it up and test it out. overall it works well but I could make some improvements. Here’s a quick video of it working: To implement the capacitive touch I used the PIC10F206 microcontroller. I chose […]

Sensor Datalogging with Cosm

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  Continuing with the Home Automation System I talked about in the last post I have been working on the datalogging server portion of the project. The purpose of this is to receive sensor data from the sensors in my apartment and server them on an internal websever and post them on Cosm for logging […]