ECW faceplate design — canonical SVG reference

Orthographic layouts for the Exact-Change Wallet. Use these as ground truth for ChatGPT / DALL-E renders — text-only prompts misread “slider” as binary slide switches.

Files

File	View	Shows
`card-slice-top.svg`	Top	102×67 mm slab, 3Q·2D·1N·4P pockets, amber coin LEDs, right-edge display + bill halo + dual rotary wheels
`card-slice-edge.svg`	Right edge profile	~5.5 mm thickness, knurled wheels (not switches), control stack order
`full-wallet-tray-ui.svg`	Tray leaf	Display stack top-right: halo → readout → `$` `−` `+` → optional 0–9 keypad (Panel D)
`full-wallet-hybrid.svg`	Tray leaf	Panel E — 11 coins: 3Q+2D+1N+4P+$1 (120 mm tray), keypad, UI rail right

SVG layers (for editors): coins, leds, display, bill_halo, wheels, buttons.

Control summary

Card Slice — rotary wheels only

Display (20.24)
Bill halo — white/blue ring around display when ≥$1 extra paper needed
Integer wheel — 0–99, $1 detents, label $
Cents wheel — 0–99, 1¢ detents (5¢ on dollar SKU), label ¢

No linear slide switches. No −/+/GO buttons.

Full Wallet — display stack

┌─────────────────┐ │ ○ BILL HALO ○ │ │ 20.24 │ │ [ $ ] [−] [+] │ │ [1][2][3] ... │ ← Dollar Plus only; below buttons, NOT on hinge └─────────────────┘

Pre-exported PNGs (300 DPI) ship alongside SVGs for ChatGPT upload:

card-slice-top.png
card-slice-edge.png
full-wallet-tray-ui.png
full-wallet-hybrid.png

Re-export after editing SVG:

# Inkscape CLI inkscape card-slice-top.svg -o card-slice-top.png -d 300 inkscape card-slice-edge.svg -o card-slice-edge.png -d 300 inkscape full-wallet-tray-ui.svg -o full-wallet-tray-ui.png -d 300 inkscape full-wallet-hybrid.svg -o full-wallet-hybrid.png -d 300 # Or librsvg rsvg-convert -w 2400 card-slice-top.svg -o card-slice-top.png

Upload PNG + chatgpt-prompt.md to ChatGPT. Iterate one panel at a time before a 2×2 sheet.

Coin tray (do not drift)

Row 1: 3× quarter
Row 2: 2× dime + 1× nickel (D·D·N) — nickel wider than dime
Row 3–4: 4× penny in 2×2 (penny SKUs) or 1× golden dollar (dollar SKUs)
Hybrid (E, wallet only): 4× penny 2×2 plus 1× golden dollar on row 5 — 11 coins, 120 mm tray; no slim Card Slice (67 mm target cannot fit all denominations)

Validate math: npm run exact-change-sim in repo root.

ChatGPT prompt

See chatgpt-prompt.md.