Last week I received the new Numeric Pad from Mindsensors to test. It has 10 digits (0...9) a "*" and a "#" key. The keyboard can be operated without actually pushing buttons. They sense the presence of your finger. Great ! To give some feedback that the key was pressed, I added a 'beep' to the software.
To give it a spin I created 2 contraptions. The first was a simple calculator. It consists of an NXT and the keypad. Nothing fancy, but it does work.
The second is a gate that is locked with a code. If you enter the correct code the gate opens, if not it stays closed. I used the colorsensor to show the state : Blue = Initializing / Red = don't drive / Green = drive
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