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Development Process |
Materials + Templates |
Brainstorming
Source Files for Fabrication:
- Soft-shell 2-piece juggling ball template with Programmaballs capacitive touch interface (PDF, svg, postscript source)
- PCB Design (cutout, top, EAGLE source .brd, .sch)
- ESP32 Arduino code
- Web UI code
Component + Materials List:
| Component | Purpose | Cost |
ESP-32-WROOM
(Fab inventory)
|
Processing, Bluetooth, Capacitive Sensing | $3.80 |
Adafruit 2000mAh Lithium Ion Battery - 3.7v
(Micro Center)
|
Power | $12.49 |
Translucent Ripstop Nylon Fabric
(Joann Fabrics via Graham)
|
Material | $0.50 |
Poly-fil Poly Pellets
(Amazon)
|
Material | $1.6 ($20 for 6lb) |
Stainless Steel Conductive Thread
(Micro Center)
|
Wiring | $0.25 ($6.99 for spool) |
NeoPixel 24 RGB x2
(Microcenter)
|
Ball lighting | $33.9 |
| JST Right Angle Connector (sparkfun (via Eyal)) | Power | $0.95 |
| SMD Capacitors - 10uF, 1uF, .1uF (Fab inventory) | Electronics | $0.37 |
| SMD Resistors - 10k, 1k x2, 499 (Fab inventory) | Electronics | $0.05 |
| SMD Slide Switch (Fab inventory) | Electronics | $0.84 |
| SMD Button (Fab inventory) | Electronics | $0.74 |
| SOT223 3.3V 1A (Fab inventory) | Electronics | $0.34 |
Total Cost (per ball): $55.83