Hermes Scope Face

Display prototype · BrainCraft 1.54″ TFT

240 × 240 IPSState Idle

Face

Shape

Render

Wireframe head that turns with the servos.

Wireframe 45%

Mesh lines 13 × 15

Agent state

Keys 1–5 pick a state, Space toggles the sequence, F cycles shape, V switches render.

Phosphor

P31: bright green, the usual scope tube.

Persistence 70 ms

Intensity 1.0×

Focus sharp

Beam noise 0.3 px

Head position

Pan +0°

Tilt +0°

Display

Refresh

Beam 0 pts/frameRender 0 fpsDecay 0.00/frame

Where each state comes from on the robot

Speak: The mouth is the waveform going to the robot's own speaker, read from the PipeWire output on the Pi. Here it is synthesized speech.
Listen: The microphone signal on the Pi, drawn dimmer. Here it is a second synthetic voice at a higher pitch.
Look: Triggered inside look() on the Pi: a shutter flash and a squint before the photo.
Think: Needs Hermes to say so: a turn-started or tool event sent to a small listener on the Pi. The eyes become rotating 3:2 Lissajous figures.
Shapes: Flat is the simplest to read across a room. Head and Low-poly trade some of that for showing direction: Head is a smooth contoured mesh, Low-poly a coarse faceted one. Phosphor render draws them as a scope would, with afterglow and beam-speed brightness; Vector render draws clean, even lines with no trails.
Head: In the head shapes the whole wireframe turns with the pan and tilt servos, so the face looks where the camera looks; in flat mode only the eyes shift. The head also cocks while listening and glances up while thinking.

The renderer is the same math the Pi would run: a 240 × 240 brightness buffer that decays each frame, a beam path traced at constant speed so slow parts burn brighter, and a small blur for glow. It ports to NumPy and Pillow almost line for line.