You may remember an RFID project that was featured here last year by The Digital Dawg Pound. Nick has come up with a new and improved RFID Door Entry System. Video after the jump. “I decided to try and improve the reliability and responsiveness of my previous RFID front door project (based around a client / server design), by re-implementing it using the Parallax BASIC Stamp 2e, and the 13.5MHz
There has been quite a few temperature devices featured here in the past. This temperature logger is nice since it uses one of my favorite temperature sensing chips, the DS18B20. This sensor is digital and does not need any calibration. When I make my next batch of home brew beer there will definitely be a DS18B20 floating in it. Or if I have some extra DS1822 devices from the fish
Japala sent in his Dremel Foot Pedal Mod that allows you to control your Dremel power using your foot. Video after the jump. “For me personally having two hands free to operate when carving is a definite plus. One hand can be used to hold the object while other hand can handle the tool. So where would one need the third arm? Dremel’s, Ferm’s, Proxxon’s rotary tools have one thing
Here is a simple design for a DIY metal detector that uses a beat frequency oscillator. “BFO ( beat frequency oscillator ) metal detectors use two oscillators, each of which produces a radio frequency. One of these oscillators uses a coil of wire that we call the search loop. The second oscillator uses a much smaller coil of wire, and is usually inside the control box and is called the
Here is another cool video of a Nintendo Wiimote controlling a robot. Video after the jump. “Control a LEGO NXT mindstorms robot with your Nintendo WiiMote and a S60 3rd edition phone.â€
This Van De Graaff project allows you to play with high voltage on the cheap. “The base is an old laundry bucket , inverted. Lay the power roller and motor on top of the bucket and mark the location of the mounting holes and roller location. Using those markings locate the closet flange and mark it’s mounting holes and the area inside to be cut out. Cut out the hole
Just hook this Alarm Phone Dialer up to something you would like to monitor, for example, a high water alarm, low temperature alarm, back window, garage door, etc. When the system is activated it will call a number of programmed numbers to let you know the alarm has been activated. This would be great to get alerts of alarm conditions from your home when you are at work. The microcontroller
