And now for something different comes this colour-activated electronic lock box from the people at Make: magazine. This is one of the most imaginative things we've seen for a while, and is so blindingly simple I'm surprised nobody has done it before (sorry if you have!).
They have used an RGB LED to reflect light off a surface, and measure the reflected amount which will vary depending on the colour of the object being used. This can then be set as the "key" for the lock, which will need to be placed in the sensor apparatus to unlock the device. A quick explanation is given in the following video:
An interesting sample of "keys" could be gathered from those paint sample cards found in hardware stores. A lot of fun and this can be made without too much effort at all, so for compelte details check out the project Instructable page. And for more, we're on facebook, twitter and Google+, so follow us for news and product updates as well.
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