23 days ago
- A panel meter calculator with floating point display was created, featuring six SO-45 panel voltmeters and one vintage edgewise meter for the display.
- The project involved making a custom acrylic panel with CNC-milled openings and spray-painted details for a three-dimensional look.
- The enclosure was crafted from thin maple lumber with a custom keypad layout, using NKK JF series tactile switches and vinyl decals for keys.
- An 8-bit AVR128DA28 MCU controls the calculator, using PWM to drive the meters and a 4x4 grid for keypad scanning, with fixed-point arithmetic to avoid accuracy issues.