pit//stop Custom Arm Accessory

Client: pit//stop ↗
Year: 2026
Duration: 2 weeks
Type: Client Work

An old medical cast upcycled into a cyberpunk arm accessory, with silicone tubing, mini LEDs, braided and soldered wires, and a salvaged Adafruit e-ink screen.

01Shape analysis

Shape analysis

L ≈ 420 mm (elbow → wrist, est.)

Technical Visualization 002

01 front, worn

upper cuff → hinge → forearm cuff → disc

sensor reads distance; disc throws a dot-shadow when backlit.

scale: figure n.t.s.

ARM UNIT 001

- - - - - - - - - - -

2 cuffs / 1 hinge / 1 disc

4 contact points

sensor: HC-SR04

light: mini LED

Ø ≈ 130 mm acrylic disc

FIG×PS–ARM–0001

Stop motion of the arm accessory, joint by joint, then lit

hover a number · stop motion, every joint, then the lights

Parts

01ultrasonic sensor (HC-SR04)
02steel butt hinge, riveted
03silicone tubing + cable glands
04upcycled cast / brace shell
05hook-and-loop straps
06ROM dial hinge (stock, kept)
07Adafruit Flora + acrylic mount
08mini LED, soldered leads
09mirror acrylic disc + magnets
10laser-cut acrylic protractor
11forearm pad + clamp bracket

Process

Adeconstruct + reshape donor medical cast / ROM brace
Blaser cut: disc, protractor, board mount (acrylic)
Csolder + braid wiring: Flora, LEDs, sensor
Dhardware: cable glands, hinges, rivets, fasteners
Eroute silicone tubing as non-functional “hydraulics”
Fstrap + fit on body, styled off the arm onto skin

02Inspiration

Sportswear and medical-inspired styling: medical tape, bandage fabrics, tubing with fasteners, working LEDs and fibre optics, colourful jumper wires and small components, silver wire, and the exaggerated, anime-character shapes of early-2000s game cyborgs.