curl --request POST \
  --url https://api.iotools.cloud/v1/tool/pcb-trace-width-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "current": "2",
  "tempRise": "10",
  "location": "external",
  "copperWeight": "1",
  "length": "100"
}
'

{
  "tool": "pcb-trace-width-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "crossSectionArea": "42.39 mil²",
    "traceThickness": "1.378 mil",
    "traceWidth": "30.76 mil",
    "traceWidthMm": "0.781 mm",
    "resistance": "62.89 mΩ",
    "voltageDrop": "0.1258 V",
    "powerLoss": "0.2516 W",
    "steps": "I = 2.000 A, ΔT = 10.00 °C, k = 0.048 (external layer)\nA = (I / (k × ΔT^0.44))^(1/0.725) = 42.39 mil²\nCopper thickness = 1 oz/ft² × 1.378 mil/oz = 1.378 mil\nTrace width = A / thickness = 42.39 / 1.378 = 30.76 mil (0.781 mm)\nR = ρ × L / A = 1.72e-8 × 0.1000 / 2.735e-8 = 62.89 mΩ\nVoltage drop = I × R = 0.1258 V, Power loss = I² × R = 0.2516 W"
  },
  "credits_used": 5,
  "credits_remaining": null
}