Andy Oh

Monklap

Monklap is a 3d-printed touchless diffuser with a shape of friendly monkey! Walk up and clap, and it responds with a pulse of fragrant mist from its mouth.

Downloads

02 — Overview

Scent,
on cue

Monklap is a wall-mounted or desktop diffuser shaped like a friendly monkey. Walk up and clap, and it responds with a pulse of fragrant mist from its mouth.

No buttons, no app, nothing to touch.

  • 01

    Touchless

    Sound and proximity replace the spray trigger, for moments when your hands are busy, wet or full.

  • 02

    Interactive

    An OLED face gives it a character and shows visible feedback for every state.

  • 03

    Ambient

    A wick-fed ultrasonic atomizer releases a 1.5-second burst of mist on demand, not a constant stream.

Front view — final prototype

03 — Target users

Monklap
is for…

Three groups who want scent to feel like a moment of play, not another chore.

  • 01
    Desk setup with a VR headset

    Aesthetic & tech enthusiasts

    Gen Z and millennials looking for desk-friendly home objects with sound-driven, physical interaction rather than another standard IoT device.

    • Desk setups
    • Character objects
  • 02
    Hands at a kitchen counter

    Touchless, functional users

    People who need instant, hands-free odor control while cooking, caring for pets, or whenever their hands are busy.

    • Kitchens
    • Pets
    • Busy hands
  • 03
    Lit storefront at dusk

    Experiential commercial spaces

    Pop-up stores, cafés and galleries that want interactive, sensory branding at the entrance — a scent that greets visitors.

    • Pop-ups
    • Cafés
    • Galleries

04 — ESP32 & sensors

Two sensors, two outcomes

05 — Inside the face

Wireframe breakdown

Hidden lines on — drawn from the Rhino model
  • Rest
    01

    Rest

    Nobody near, or no sound

  • Wake
    02

    Wake

    Someone near + clap or noise

  • Smile
    03

    Smile

    Smiles back at the clap

  • Pulse
    04

    Pulse

    1.5 s burst of mist

06 — System & assembly

Fill, twist,
clap.

  1. 01

    Fill the tank

    Fill the tank with water and a water-soluble air freshener.

  2. 02

    Twist into the head

    The lid's bayonet locks into the head. A wick carries water up to the mouth.

  3. 03

    Hang it and clap

    A keyhole slot on the back hangs it on a single screw. No buttons. The face does the rest.

    Keyhole slot on the back

07 — Sketch & ideation

From a button to
a clap

Monklap began as a "Sound & Scent System": a comfort tool for public spaces that played music as people walked by, then sprayed fragrance on their wrists at the press of a button.

Kept
Walk-up wake, a digital face, scent as a reward
Changed
The button became a clap; the form became a monkey
Initial concept — walk-by music & wrist spray
Form studies — head, sensors & tank

08 — Process & lessons

Process & lessons

Modeling
Printing
Soldering
Assembly
Modeling
Taking Monklap from rough sketches to 3D models in Rhino taught me that the more specific a plan is, the less time I lose troubleshooting changes later. I now understand not only how to model objects for real-world use, but also how to plan a project so each stage of making flows into the next with less friction.
3D printing
I printed Monklap's parts from my Rhino models on a Bambu Lab A1 using Bambu Studio. Printing itself went smoothly, but some edges warped, so I had to sand those surfaces flat.
Soldering
I troubleshot shorts caused by broken cords, cold solder joints and tangled stripped wires. Each time, I reopened the board, resoldered the joints and added hot glue so the same problem wouldn't happen again.
Assembly
Using the joint structures I designed during modeling, I fitted the sensors, display and atomizer in order. My plans for the circuits and wick didn't always match reality, so it took a lot of trial and error. After four rounds of printing and fitting, I arrived at the current Monklap.

09 — Final prototype

Monklap, awake.

The finished Monklap: live OLED eyes, ultrasonic sensors in the nostrils and an atomizer in the mouth, all running on an ESP32.

Front — awake
Three-quarter view
Clap → pulse of mist