Fingerprint Scanner Both Simplifies And Complicates Opening Garage Door

Fringer Print Scanner Garage Door Opener

Opening a garage door by hand is a lot of work and a hassle, hence the advent of the garage door opener. Nowadays, some people may even say just pushing the button of a remote control requires too much effort. [nodcah] is one of those people so he came up with a fingerprint scanner that controls a pre-installed garage door opener. All kidding aside, it is a cool project that lets you into your garaage, keeps unknown people out and doesn’t require you to remember to carry a key or remote.

In the center of this project is an ATmega328 that runs a custom Arduino code. This ATmega328 is responsible for controlling a 16 character, 2 line LCD screen as well as communicate with an off the shelf fingerprint scanner from Sparkfun. The fingerprint scanner has a built in CPU, can store up to 20 fingerprints and does all its own processing of fingerprint scans. It then communicates to the ATmega328 with simple commands over serial Tx and Rx lines.

The ATmega328, LCD and fingerprint scanner are all mounted outside the garage in a 3D printed enclosure. If the wires for the internal-garage open/close button were just run straight into this outdoor module, anyone could open it up, short the wires and get into the garage. To prevent this, if the ATmega328 gets the ‘OK’ from the fingerprint scanner, then it sends a signal to an ATtiny85 that is inside the garage. If the ATtiny85 receives the correct signal, it will then actuate the garage door opener by shorting the open/close button contacts. This prevents anyone from sneaking into the garage.

[nodcah] did a great service to the community by making all of the part list, schematics, instructions and Arduino code available so anyone can easily put this project together.

[Read more...]

Kinect full body scanner

kinect-full-body-scanner

Why let the TSA have all the fun when it comes to full body scanning? Not only can you get a digital model of yourself, but you can print it out to scale.

[Moheeb Zara] is still in development with a Kinect based full body scanner. But he took a bit of time to show off the first working prototype. The parts that went into the build were either cut on a bandsaw, laser cut, or 3D printed. The scanning part of the rig uses a free-standing vertical rail which allows the Kinect to move along the Z axis. The sled is held in place by gravity and moved up the rail using a winch with some steel cable looped over a pulley at the top.

The subject stands on a rotating platform which [Moheeb] designed and assembled. Beneath the platform you’ll find a laser cut hoop with teeth on the inside. A motor mounted in a 3D printed bracket uses these teeth to rotate the platform. He’s still got some work to do in order to automate the platform. For this demo he move each step in the scanning process using manual switches. Captured data is assembled into a virtual module using ReconstructMe.

The Kinect has been used as a 3D scanner like this before. But that time it was scanning salable goods rather than people.

[Read more...]

Follow

Get every new post delivered to your Inbox.

Join 92,119 other followers