1. Fire Extinguisher Car
Lee Bowman, Sean Knight, Wenjian Qin, Duptho Kinga, Siyuan Qi, Desmond Lai
Electrical Engineering, University of Nebraska-Lincoln. Group 70
Fires happen everyday throughout
households in the world. This project is a
small scale version of a fire fighting car
that can navigate a house to find a fire
and extinguish it.
Overview
Our project consists of three pieces. The
first part is a 10’ x 10’ maze to simulate
the basic layout of a house with 4 rooms.
The second part is a candle with a
transmitter to simulate a real fire and a
fire alarm. The third part consists of the
car which will autonomously navigate
the maze to find the fire and put it out.
Application Materials And Parts
 8 - Ultrasonic Distance Sensors
 2 - Infrared Sensors (Car and Candle)
CO2 Tank with Regulator
 315 MHz Receiver and Transmitter
 2 – 16 Channel Analog Multiplexers
 180° rotation servo motor for the turret
 2 - DC geared motors with a SN754410
H-bridge chip which controls the motors
 12 V, 6800 mAh battery which gives us
about 4 hours of maze navigation battery
life.
1 - ATMEGA328p Microprocessor
 Arduino Mini Pro to control the candle
fire alarm.
Schematicthe maze to find the fire and put it out.
The car is activated by the lighting of the
candle which will cause the transmitter
to signal the car to wake up and look for
the fire. The car navigates by using its 8
ultrasonic distance sensors and an
Infrared sensor moved constantly 180
degrees by a servo.
Once the fire is located and the car has
moved close enough to the flame, it will
shoot a blast of carbon dioxide to
extinguish the fire. The car will then go
to sleep and listen occasionally on the
receiver until another fire is started.
Fire Car Flowchart (Left), Fire Alarm Flowchart (Right)
Schematic