Wireless POV Clock

thingiverse

The remix incorporates a clock designed by holybaf, utilizing snug's POV clock case. The Arduino Mini and LEDs are powered wirelessly by a coil positioned underneath, effectively creating a transformer with the coil attached to the rotating CD. This setup generates approximately 8V from a 5V source. I developed a custom board to house the oscillator instead of using strip board, allowing me to employ a medium-power transistor that enables higher voltage operation (it can become extremely hot at 12V but functions fine at 5V). None of my available RTC boards were sufficiently compact. I designed a simple circuit that integrates a DS1302 and 32.768kHz crystal, utilizing a header that aligns neatly with the Arduino. The battery powering the RTC to maintain time even when power is absent is mounted as the counterweight for the Arduino and RTC circuits. The code employed by holybaf appears in numerous POV systems of this type. It assumes a constant motor speed and relies on hardcoded timing. I have rewritten the code, utilizing Timer1 to measure rotation speed and Timer2 to output LEDs based on the measured rotation speed.