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SportsDesign complete on paper (stages 1-6), not built

CourtCall Club

Replay and challenge courts that pickleball and padel clubs sell per court-hour

Two fixed cameras and a fence button per court give players an instant replay on the court screen and a clip on their phone; the Line option shows the bounce frame from 120 fps cameras looking along the line.

Who buys it
Owner or general manager of an indoor pickleball or padel club with 4 to 16 courts.
Why it pays
Clubs sell replay passes per booking: 25% of 60 weekly bookings at $4 is about $258 a month per court against a $39 fee (est.). Hardware is $690 per 4-court hub plus $390 per court, against about $3,200 per court per year for PlayReplay.
Target price
$690 hub + $390/court + $39/court/month; Line option +$590/court + $20/month (target)
First-minute wow
Press the orange button after a great rally and both camera angles replay on the court TV within 3 seconds.
See the CAD designConcept page
CourtCall Club concept: the idea and where each part goes
The concept. The CAD design is below, under Printable CAD.

What the research found

And how this design answers it

  • Phone apps (SwingVision $179.99/yr) sell to players → sold to the club as a fixed installation with zero player setup
  • Officiating-grade accuracy needs Hawk-Eye-class systems → no official calls; the Line option shows the bounce frame and says 'too close to show' when it cannot tell
  • Clubs have little budget → shared Edge Hub, bought $110 PoE cameras and strap-on mounts keep capex near $400 per court
  • Incumbents sell through RFPs and quotes → self-installed kit, month-to-month, aimed at independent 4-16 court clubs
  • Video of juniors → clips stay on site for 7 days and leave only when a player requests one by QR

Use case

Replay pass at league night

PlayersClub front deskCourtCall hub

  1. 01Trigger: the booking includes the $4 replay add-on, so the court is armed
  2. 02Detection: a player presses the fence button after a long rally
  3. 03Replay: the hub stream-copies the last 30 s from both cameras and the court TV plays it in under 3 s
  4. 04Action: players scan the court QR and get the clip link by SMS

Outcome: About $258 a month of new replay revenue per court at a 25% attach rate (est.)

How it works

Architecture

  1. 01

    Sense: 2 Reolink 4K PoE cameras per court; optional 2 Arducam 120 fps global-shutter line cameras on the net post

  2. 02

    Decide: Edge Hub (Pi 5 + Hailo-8) keeps a 60 s stream-copy ring and detects play; the Line node finds the bounce frame

  3. 03

    Send: local MQTT and WebSocket to the court screen; events only to the cloud, clips only on request

  4. 04

    Tell: court TV replay, QR clip page, club desk view and a weekly utilisation report

Hardware

Real parts, buyable today

Bill of materials: about $290 per court (Replay) plus $482 per 4-court hub; Line option about $281 per court (est.).

BlockPartWhy this part
HubRaspberry Pi 5 8GB + AI HAT+ 26 TOPS (Hailo-8)Shared IEMI Edge Hub, 8 camera streams = 4 courts
Replay cameraReolink RLC-811A 4K PoE, 5x zoomBought, IP67, frames a whole court from a fence corner, H.264 plays in any browser
Line cameraArducam B0332 OV9281 global shutter USB, 120 fpsNo rolling-shutter skew on a fast ball; MJPEG over USB 2.0
Line nodeRaspberry Pi 5 4GB + PoE+ splitterCPU bounce detection on line-band crops at 120 fps
Replay buttonSeeed XIAO ESP32-C6 + 30 mm arcade button + 18650Deep sleep, wakes on press, about 2 years per charge on paper

Mechanical

Printable CAD

8 parts, generated from code and checked as closed solids. Pick a part to inspect it, or download the STL files to print.

See the CAD parts render
CourtCall Club printable parts, rendered from the CAD
Render of the printable parts from the actual CAD. Not yet printed or photographed.

Loading the CAD…

Real CAD · drag to rotate · scroll to zoomReal CAD · swipe sideways

Open risks we are working on

  • Line IN/OUT accuracy on a 74 mm plastic ball is unproven; fallback is 120 fps line replay with no verdict
  • Player willingness to pay for replays is unmeasured
  • League rules on net-post attachments and booking-system API access are unconfirmed
  • PlaySight or PlayReplay could launch a cheaper club tier

Design stage only: nothing on this page is for sale. Specifications and prices are targets.