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Give your agent presence.

  • Plus One is an open hardware puck for your AI agent.
  • Your agent can program every part of it.
  • Hold the plus to talk, and the ring lights up when it needs you.
Walk its line in 3D See what’s inside
Plus One rendered from its CAD model. A round graphite puck, 55.4 mm across and 12 mm thick, with a plus button in the middle and a lime light ring around it.
Ideas and concept images, not built yet

A blank canvas for your agent.

  • Flash any firmware you can imagine.
  • Your agent can control every part of it.
  • Brick it and BOOT brings it back.
  1. Concept image. Plus One clipped to a shirt pocket, pressed with one finger.NotesRecord a conversation and send it to your AI notes.
  2. Concept image. Plus One on a hiker's backpack strap, in the mountains.TranslateSomeone speaks Japanese and you hear English.
  3. Concept image. Plus One sitting on a charging disc of the same width on a bedside table.HomeOne press turns off every light and the TV.
  4. Concept image. Plus One on the back of a current iPhone held in one hand, laid out to scale.ApproveYour coding agent asks and you tap yes.
  5. Concept image. Plus One mounted on a bike's handlebar.RideIt reads out your next turn on the bike.
Inside

What’s inside.

  • Seven layers, sealed into one core.
  • It works on its own with nothing attached.
  • Anything you add goes on the far side of the base.
Exploded render of Plus One from its CAD model. Top to bottom, the plus button, the light ring, the top shell, the main board, the speaker, haptic motor and battery, and the sealed base with its magnet ring, charging coil and pogo pads.
Size

How big is it.

  • 55.4 mm across and 12 mm thick.
  • As wide as a magnetic phone charger, edge to edge.
  • A watch size, about 42 mm, comes next.
Plus One on a magnetic charging disc of the same width, between a US quarter and a credit card, rendered to one scale. The quarter is 24.3 mm, the puck 55.4 mm and the card 85.6 mm wide.
Concept image. Plus One on the back of a folding iPhone held in one hand, laid out to scale.
On a folding phone
Light

What it tells you.

  • Lime while it listens.
  • Orange when an agent needs you.
  • Dark means the mics are off.
Open

Print a back for anything.

  • Magnets inside snap it onto magnetic chargers and mounts.
  • Drop it in and twist 18 degrees to lock.
  • Change one number in the template and print your own.

The accessory kit ↗Its Open Product ↗

Rendered from the accessory kit's CAD. Plus One above a steel ring and a lime printed back, with the back turned 18 degrees short of locked.
Snap
Rendered from the accessory kit's CAD. Plus One locked into the printed back.
Lock
Build

What you can build with it.

  • Plus One is the core, and the first build.
  • Plus One+ fits more parts on the same board, in a clear shell.
  • Plus One++ comes in a box with a dock, a clip and modules.
Plus One in graphite beside Plus One+ in a clear shell that shows its board, rendered from the CAD model.
The line

The first gadget that ships with its own factory.

  • We design the line with the product.
  • It takes a board to a tested, packed unit.
  • Every number on it is simulated on a CPU and uncalibrated.

Walk the MadeCell line in 3D →Step through the assembly →The proposed line in its Open Product ↗The tracker puck run, our working proof →

Plus One's line on a MadeCell base in the Golden Twin viewer, simulated.

Want one when it’s real?

Follow the build Its Open Product ↗