There has been a lot of interest in muscle powered electronic devices, due in large part to the success of
Perpetual TorchPerpetual Torch, also known as battery-less LED torch. The battery-less torch consists of a voltage generator to power the LEDs, an electronic circuit to condition and store the voltage produced by the voltage generator and high efficiency white LEDs.
The muscle powered voltage generator is based on Faraday's law, consisting of a tube with cylindrical magnets. The tube is wound with a coil of magnet wire. As the tube is shaken, the magnets traverse the length of the tube back and forth, thus changing the magnetic flux through the coil and the coil therefore produces an AC voltage. We will come back to this later in the Instructable.
This Instructable shows you how to build an electronic, batterless dice. A photograph of the built unit is seen below.
But first some background --->
Instead of a traditional dice, it is nice and cool to use an electronic dice. Usually such a dice would consist of an electronic circuit and a LED display. The LED display could be a seven segment display that could display numbers between 1 and 6 as seen below or perhaps, to mimic the traditional dice pattern, it could consist of 7 LEDs arranged as shown in the second figure. Both the dice designs have a switch, which the user has to press when she/he wants to "roll the dice" (or "roll the die"?). The switch triggers a random number generator programmed in the microcontroller and the random number is then displayed on the seven segment display or the LED display. When the user wants a new number, the switch has to be pressed again.
5 of 5 of course.
Nano
Love the tutorial, great job!
but i forgot to order the pulse detector diodes >.<
and i still need to wrap the tube with that copper wire...
but i have the rest ready :)
i have a 3 sorts of stuff lying around; resistors, capacitors, and LEDs
for the rest, i need to order everything if i need some specific thing...
http://www.magnet4sale.com/product.php?productid=16394&cat=357&page=1