Front panel elements (left to right): Rack ears with M6 holes · Logo plate · 128×64 OLED (shows IP, TC, GPU temp, PSU state, pipeline status) · 5 status LEDs (PWR/SDI/GEN/TC/ERR) · USB-A 3.2 (local access) · Illuminated power button · Dual PSU status indicators A/B
1RU Rear Panel — CPB-1U-RTX
OLED Front Panel System — How It Works
How it works: A Raspberry Pi Pico W ($6) sits inside the chassis connected via USB to the main CPU (appears as /dev/ttyACM0). The Chroma Pulp daemon writes a JSON status packet to that serial port every second. The Pico runs MicroPython firmware that reads it and renders the display on a $8 SSD1306 OLED via I2C. Total cost: $23. The Pico also has WiFi so it can independently reach the pipeline's REST API as a fallback.
iPad UI Layout — Touch-Optimised Remote Control
Key iPad UX decisions: Sliders use 44pt touch targets (Apple HIG minimum) · Toggle switches are 44×24pt · Quick action buttons are 100×36pt for gloved-hand use on set · Panels collapse into a bottom sheet on portrait orientation · No file picker dialogs (unavailable in browser) — backgrounds loaded via drag-drop or from the box's stored media library.