What input device? Just use your arm

This one could be a game changer. [Chris Harrison] and a team of researchers are showing off a method of using your arm as an input device. An arm band worn by the user picks up acoustic signatures created by tapping on your arm with the other hand, or taping your fingers and thumb together on the same hand. They’re achieving accuracies in the 82-97% range but it gets even better. Take a look at the video after the break and see what they’ve done by adding a pico-projector to the arm band in order to use your arm or hand as a touch display.

We liked seeing the concept mice from October, but the future of input devices might already be attached at the elbow.

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Tap-controlled metronome


[Adam] and his buddy [Matthew] sent in their tap-controlled metronome, or as they prefer, “metronome with an attitude.” Using the piezo speaker you can tap patterns and rhythm into the memory and it will repeat it back to you in loop. The two buttons allow you to speed up or slow down the beat which is indicated by an led array. As per their request, we mention its entirely on a PIC 16F, not an Arduino. Perhaps the most interesting part we found that’s definitely worth checking out was their amazingly detailed build process. Check out a quick video of the metronome in action after the break.

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Passive network tap

Making a passive network tap can be an easy and inexpensive undertaking as shown in this Instructable. Passive monitoring or port mirroring is needed because most networks use switches which isolate the network traffic and this does not allow for the entire network to be monitored.  This example uses a single tap, using multiple taps will provide access to the full-duplex data separately. By using two taps you are able to monitor inbound data that is passed through one tap, and outbound data that is passed through the other tap.  Separate taps are desired because most sniffer software handles half-duplex traffic only and requires two network cards for full-duplex.

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