SUMMARY
The discussion focuses on measuring the linear velocity of a toy car using an optical mouse or a low-cost LED and phototransistor setup. A suggested method involves utilizing two LEDs and two phototransistors connected to a dual Op-amp configured as comparators, with audio recording to capture the timing of the car passing through the beams. The calculated linear velocity is derived from the distance between the LEDs and the recorded time intervals. The total cost for this setup is under $5, providing an affordable alternative to GPS modules.
PREREQUISITES
- Understanding of basic electronics, including LEDs and phototransistors
- Familiarity with audio recording techniques for timing analysis
- Knowledge of linear motion equations and velocity calculation
- Experience with circuit design, particularly using operational amplifiers
NEXT STEPS
- Research how to process USB output from optical mice for velocity measurement
- Learn about using operational amplifiers in comparator configurations
- Explore audio analysis software for precise timing measurement
- Investigate alternative low-cost methods for real-time velocity tracking, such as using accelerometers
USEFUL FOR
This discussion is beneficial for hobbyists, electronics enthusiasts, and educators interested in practical applications of physics and electronics in measuring motion. It is particularly relevant for those looking to implement low-cost solutions for velocity measurement in small-scale projects.