10 hours ago
- The voltmeter clock uses analog panel voltmeters instead of traditional clock faces to display time.
- The design includes replacement decals on adhesive paper, with 13 hour divisions and 61 minute/second divisions for continuous motion.
- The enclosure is made of maple lumber, with CNC-milled front and back panels and a curved side wall created by notching and bending wood.
- The circuit uses an AVR128DB28 MCU, a wall wart power supply, an 8 MHz crystal, and three output pins to drive the meters without DACs.
- The code runs a 10 Hz timer interrupt and manually toggles output pins to control meter position via duty cycle.
- The clock features intentional dramatic drop and bounce for visual interest, and no protection diodes are needed due to low impedance push-pull drive.