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# KarlsDiyDyno --:-- | --

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Load Cell Calibration (Known Weight)
1. Remove all weight → click TARE on main page
2. Place known weight → enter it below → click CALIBRATE
Important: New calibration factor will be very small (usually 0.0001–0.01 range) — this is normal!
Known Weight (kg)
Current Calibration Factor
Max RPM Gauge Range
Max Horsepower Gauge Range
Max Torque Gauge Range (Nm)
Lever Arm Length (cm)
Dyno Mode
RPM Source
Gear Ratio Mode
Manual Gear Ratio (Engine RPM ÷ Drum RPM)
Drum-only setups: Set to 1.0 for raw drum HP/torque.
With engine sensor: Set to your actual gear ratio for estimated engine numbers.
Auto mode requires both engine and drum hall sensors.
Brake Roller Ratio (Engine ↔ Roller RPM)
How this ratio works:
• Brake Roller Hall mode: Display RPM = Roller RPM × Ratio
• Engine Hall mode (no roller signal): Virtual Roller RPM = Engine RPM ÷ Ratio
Example: If engine spins 4× faster than roller → enter 4.0
Triggers Per Revolution (Engine Hall)
How many times the hall sensor triggers per full crankshaft revolution.
• 1 = single magnet/tooth (most common)
• 0.5 = ignition coil signal (fires once every 2 crank revs)
• Other: 2, 4, 6, 8, 10
Triggers Per Revolution (Roller/Drum Hall)
Number of triggers per full revolution of the brake roller/drum (pin 5).
• 10 is common for multi-magnet setups
• 1 for single magnet (less common)
• Higher if using multi-tooth wheel or encoder
RPM Noise Filter (0.1–0.9, higher = faster response)
Higher for quick 2-stroke spool-up (0.5–0.8), lower for smooth 4-stroke (0.2–0.3). Default: 0.18
Engine Hall Debounce Time (µs)
Minimum time between engine hall sensor pulses to ignore electrical noise.
• 500-1000µs for clean signals
• 1500-3000µs for noisy environments
Default: 1400µs
Drum Hall Debounce Time (µs)
Minimum time between drum hall sensor pulses to ignore electrical noise.
• 100-200µs for clean signals
• 300-600µs for noisy environments
Default: 220µs
Median Filter Size (odd number 3-9)
Number of samples used for median filtering to remove outliers.
• 3 = Least smoothing, fastest response
• 5 = Default, good balance
• 7 or 9 = More smoothing, slower response
Note: Must be an odd number.
Drivetrain Efficiency (%) — Crank Power Correction
Accounts for power losses in chain, sprockets and gearbox.
Typical values:
• Simple chain drive: 93–96%
• Chain + gearbox/CVT: 88–93%
• Worn chain/sprockets: 85–90%
Set to 100% to disable correction (show wheel power).
Max Safe Drum RPM (Safety Limit)
Prevents false readings from sensor noise. Set based on your drum size:
• 30cm drum: ~3,200 RPM • 40cm drum: ~2,400 RPM
• 50cm drum: ~1,900 RPM • 60cm drum: ~1,600 RPM
Drum Mass (kg) — Inertia Mode
Drum Diameter (cm) — Inertia Mode
Drum Inertia Type
Wall Thickness (cm) — Hollow only
Custom Drum Inertia (kg·m²)
Connect to Existing WiFi Network (Client Mode)
Enter credentials → click CONNECT → ESP32 will reboot as client
Leave empty for default AP mode
WiFi SSID WiFi Password

## Maintenance & Updates

Use these to update firmware or web interface files wirelessly