LapTimer 2000 slot car timer with parallel photo sensor cable on Win98se - YouTube
Pc Lap Counter - Slot racing software - Lap Timer - Lap Counter - timing software
Lap Timer 2000 (Windows) - Download
Amazon.com : SC SPORTCOUNT LapCounter and Timer - Waterproof Lap Counter Timer for Swimming, Biking, Running Triathletes - Accurately Tracks Laps and Times to Help You Stay Focused : Sports & Outdoors
DIY USB Slotcar timer v3.0 finally working! - YouTube