SSCR

What You Need

• A webcam or USB camera pointed at your track's finish line
• 1–4 slot cars on the track
• This file open in Chrome, Edge, or Firefox

Step 1 — Mount Your Camera

Position the camera above or at an angle so the finish line is clearly visible. Keep the camera completely still during the race — even slight vibration can cause false detections.

Step 2 — Set Total Laps

Enter how many laps a car needs to complete to win under Race Setup. Default is 5.

Step 3 — Draw Detection Zones

Each car gets a small detection box drawn over its lane at the finish line. When a car passes through its zone, the motion triggers a lap count.

1. Click a Car button (Car 1–4) under Detection Zones — it will glow.
2. On the camera view, click and drag to draw a small rectangle over that car's lane at the finish line.
3. Release the mouse to confirm. A checkmark (✓) will appear.
4. Repeat for each car racing.

Step 4 — Adjust Motion Sensitivity

The Motion Sensitivity slider controls how easily motion triggers a lap. The motion bar inside each zone shows activity in real time — the dashed line marks the current threshold.

• Slide left (lower) — triggers on subtle motion. Use if cars are small or fast.
• Slide right (higher) — requires more movement. Use if getting false laps.

Step 5 — Start the Race

Press ▶ Start. The background is captured at this moment — make sure no cars are sitting in the zones when you press Start.

The race clock starts immediately. Each time a car crosses its zone, the lap is counted and timed. The zone will flash and show "LAP!" on screen.

Step 6 — Scoreboard

The right panel shows live standings including position, laps completed, last lap time, best lap time, and a progress bar. The signal dot next to each car shows: green = detected, yellow = weak signal.

Step 7 — Winner

The first car to complete the set number of laps wins and a gold banner appears with the total race time.

Reset

Press ↺ Reset to clear all laps and times. Detection zones are kept so you don't need to redraw them.

Recapture Background

If lighting changes mid-race, press ⟳ Recapture Background. Make sure all cars are out of the detection zones first.

Troubleshooting

• False laps triggering — raise the sensitivity slider, or check for shadows/reflections in the zone.
• Laps not detected — lower the sensitivity, or make the zone slightly larger.
• Camera vibration issues — secure the camera mount and press Recapture Background.