Three neodymium magnets were attached to each side of the fidget spinner. In addition to being magnetic, the magnets added weights, which allowed the spinner to spin longer. The spinner wasn’t heavy nor light and had a very small resistance that made it spin for more than a minute.

Although the spinner worked very well, the copper coil did not.

I tested if the coil was working well by connecting the coil to the multimeter and spinning the fidget spinner on the coil.

Before I spun the spinner, the voltage was 48mV.

After I spun the spinner, the voltage did increase to 69mV. However, it is impossible to light a LED with only 69mV, which means that the coil has to be much more efficient.

In order to improve the efficiency of the device, the magnet has to be stronger, or the copper has to be winded at least a thousand times.

To maximize the efficiency, I bought a longer copper wire and winded it. Also, I added three more magnets on the spinner to increase the efficiency.

 

The new coil conducted electricity much more effectively than the previous one. According to the multimeter, the maximum voltage was 0.89V. However, the high voltage lasted only for a second, so the LED was not lighted.

After multiple tries, it was concluded that the device does produce electricity, but it was not enough to light a LED.