The Client / Server Door Opener
Alexandre made his own door opener – “I sit about 5m from my office’s door. So, every time someone ringed the bell I had to stand up and open the door. That would be fine if the door did not have an electric door opener just next to it! An ingenious device that allows you to open the door by simply pressing a button. Because of this, the device had no use at all. After all, if you were in front of the door, you could simply open it using the handle. Thus my goal was to give a purpose for the simple life of this poor electric door opener (and, of course, to save a walk of 5m ten times per day).” [via] Link.
This might be a good Roomba mod project…“Grower is a small ‘rover’ vehicle which navigates around the periphery of a room. It hugs the room’s walls and responds to the carbon dioxide levels in the air by actually drawing varying heights of ‘grass’ on the walls in green ink. The Grower robot senses the carbon dioxide (CO2) level in the air via a small digital CO2 sensor.” Thanks James! 
Neoteric writes “This is my second robot after getting the kit for Christmas. No prior electronics experience. The robomaid redo I have been working on is complete. I call it Robomaid2. It uses the outside of 
Phil writes “Spare time projects of engineers. Some wierd, some wonderful. It’s a regular feature of Design News magazine, and always gets passed around here in the lab – Design News celebrates the third anniversary of the Gadget Freak files. This popular column, sponsored by Allied Electronics, profiles the sometimes useful and always entertaining inventions that Design News readers come up with in their spare time.” 
Dhruv writes “This page has great animations that break down the complicated process behind creating a single transistor (the basic building block of almost all computer chips).” 
This little robot car from Nakamura-san at Himeji Soft Works in Japan drives around then it transforms into a real robot and walks around. I want to build one of these or buy one immediately. [
Devin writes “These pages are a nice guide to making high voltage items (toys?) out of trash! These two pages show how to make a Tesla Coil out of trash, and how to hook up TV flyback ransformers for all sorts of fun HV stuff (arcs, jacob’s ladders, capacitor-bank charging, coin-shrinking, etc.)”