Wireless Laser-Gate Timing System for Track and Field

Costs around $120 USD (incredibly cheap compared to competitors) and uses easy-to-find components.

Jul 21, 2019

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Components and supplies

1

RGB LCD Shield Kit, 16x2 Character Display

2

SparkFun Transceiver Breakout - nRF24L01+ (RP-SMA)

2

LED, Blue Green

3

9V Battery Clip

2

Plastic Enclosure, Project Box

2

5 mm LED: Red

1

Keyes laser module

3

Toggle Switch, Toggle

2

nRF24L01+ 3.3V Regulator

2

5 mm LED: Green

1

Speaker: 3W, 4 ohms

2

Arduino UNO

2

Tripod

6

LDR, 5 Mohm

Apps and platforms

1

Arduino Web Editor

Project description

Code

Downloadable files

Custom Laser PCB Board

Custom Laser PCB Board

Custom Start Line PCB Schematic

This is the PCB that goes in the module that sits on the start line

Custom Start Line PCB Schematic

Custom Laser PCB Schematic

You can also use any laser module or laser you have lying around. But I created my own.

Custom Laser PCB Schematic

Custom Finish Line PCB Schematic

This is the PCB that goes in the module that sits in the finish line

Custom Finish Line PCB Schematic

Custom Finish Line PCB Board

This is the PCB that goes on the finish line module

Custom Finish Line PCB Board

Custom Start Line PCB Board

This is the PCB that sits on the start line

Custom Start Line PCB Board

Custom Start Line PCB Schematic

This is the PCB that goes in the module that sits on the start line

Custom Start Line PCB Schematic

Custom Laser PCB Board

Custom Laser PCB Board

Custom Laser PCB Schematic

You can also use any laser module or laser you have lying around. But I created my own.

Custom Laser PCB Schematic

Custom Finish Line PCB Schematic

This is the PCB that goes in the module that sits in the finish line

Custom Finish Line PCB Schematic

Custom Finish Line PCB Board

This is the PCB that goes on the finish line module

Custom Finish Line PCB Board

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