EMOJI COMPANIONS / ORIGINAL COMPANION

MochiThe original desk companion.

Mochi brings a display, microphone, speaker and expressive servo into one friendly assembly. It is a useful place to understand the virtual robot API and plan an interactive robot's parts and power paths.

Build with Mochi Explore the design

Includes assembly, starter wiring and executable virtual JavaScript.

ASSEMBLY PREVIEW/EMOJI

Static illustration · loading 3D

Orbit the actual starter assembly. Open the workbench to edit or run it.

9components

19starter connections

0.59 kgestimated component mass

Virtual controllercontrol platform

Concept illustration · inspect actual geometry above.

A COMPLETE STARTING POINT

Get to know
what's inside.

The original display, microphone, speaker and servo example. All 9 components and 19 starter connections remain editable in your own project.

Interaction conceptsVirtual API learningAudio and display layouts

View the included component types

Emoji enclosure
2S battery · 2.2 Ah
5 V buck regulator
Robot controller
AI compute module
Emoji OLED display
MEMS microphone
Mini speaker
Position servo

YOUR FIRST THREE EXPERIMENTS

Build understanding.
One change at a time.

Use the starting assembly to ask better questions about your design. Save a copy, change a parameter and compare what happens.

Inspect the design

Run the starter face loop and watch its expression log.

Try a change

Inspect power, shared ground and servo PWM connections.

Compare and learn

Plan microphone and speaker placement while keeping the current text-event audio limits in view.

emoji-classic.jsVIRTUAL API

let previous = '';
function step(robot) {
  robot.drive(0, 0);
  if (robot.brownout || robot.battery.voltage < 6.25) { robot.display('🪫'); return; }
  const face = ['😊', '🤖', '◕ ◕', '😴'][Math.floor(robot.time / 2) % 4];
  robot.display(face);
  robot.servo('servo', 0.45 * Math.sin(robot.time));
  if (face !== previous) { robot.log('Expression:', face); previous = face; }
}

The full, editable starter script is included in the workbench.

KNOW WHAT YOU'RE TESTING