Intersection with Traffic Lights

Teaching kids how traffic lights work.

Jan 18, 2020

16843 views

17 respects

Components and supplies

1

Transistor NPN (BC547 or similar)

56

200 ohm 1206 SMD resistor

1

TF card U disk MP3 player / decoder module

1

Plastic pipe 10mm diameter

16

Green 1206 SMD LED

1

12V relay (A12W-K)

2

DC-DC adjustable step-down voltage regulator with LM2596

1

Illuminated tactile switch Blue

2

SX1509 IO expander module

1

Illuminated tactile switch Green

1

12V/1A power adapter

24

Electrical installation boxes

1

Arduino Nano R3

1

DC jack female panel mount

24

Red 1206 SMD LED

4

PCF8574T (SMD)

1

4 channel I2C Logic Level Converter Bi-Directional Module 5V to 3.3V

1

Terminal Adapter Board For Arduino Nano 3.0

12

Yellow 1206 SMD LED

1

Illuminated tactile switch Red

1

Plastic plate 2mm thick, 93x73cm

1

PCF8575 IO Expander Module I2C To 16 IO

1

Buzzer, Piezo

1

Diode BA159

4

White (cold) 1206 SMD LED

Tools and machines

1

Soldering iron (generic)

1

Drill, Screwdriver

Project description

Code

SX1509 library

/

0
0
Latest commit to the master branch on Invalid date

Main code

arduino

SX1509 library

/

0
0
Latest commit to the master branch on Invalid date

Main code

arduino

Downloadable files

Schematic of railway traffic light with 3 LEDs

Schematic of railway traffic light with 3 LEDs

Schematic of railway traffic light with 3 LEDs

PCB of pedestrian traffic light with 2 LEDs

PCB of pedestrian traffic light with 2 LEDs

PCB of pedestrian traffic light with 2 LEDs

Schematic of pedestrian traffic light with 2 LEDs

Schematic of pedestrian traffic light with 2 LEDs

Schematic of pedestrian traffic light with 2 LEDs

PCB of railway traffic light with 3 LEDs

PCB of railway traffic light with 3 LEDs

PCB of railway traffic light with 3 LEDs

Schematic of main traffic light with 7 LEDs and PCF8574T

Schematic of main traffic light with 7 LEDs and PCF8574T

Schematic of main traffic light with 7 LEDs and PCF8574T

PCB of main traffic light with 7 LEDs and PCF8574T

PCB of main traffic light with 7 LEDs and PCF8574T

PCB of main traffic light with 7 LEDs and PCF8574T

Schematic of pedestrian traffic light with 2 LEDs

Schematic of pedestrian traffic light with 2 LEDs

Schematic of pedestrian traffic light with 2 LEDs

PCB of railway traffic light with 3 LEDs

PCB of railway traffic light with 3 LEDs

PCB of railway traffic light with 3 LEDs

Schematic of main traffic light with 7 LEDs and PCF8574T

Schematic of main traffic light with 7 LEDs and PCF8574T

Schematic of main traffic light with 7 LEDs and PCF8574T

PCB of pedestrian traffic light with 2 LEDs

PCB of pedestrian traffic light with 2 LEDs

PCB of pedestrian traffic light with 2 LEDs

Schematic

Complete schematic

Schematic

PCB of main traffic light with 7 LEDs and PCF8574T

PCB of main traffic light with 7 LEDs and PCF8574T

PCB of main traffic light with 7 LEDs and PCF8574T

Schematic of railway traffic light with 3 LEDs

Schematic of railway traffic light with 3 LEDs

Schematic of railway traffic light with 3 LEDs

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Table of contents

Intro

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