Reverse Car Parking Sensor Circuit
Reverse Car Parking Sensor Circuit
Reverse Car Parking Sensor Circuit
This car parking assistant can protect your car from any damage while reverse parking. It indicates the distance
of car from any object and raise an alarm when it reaches close to the wall or the object and needs to be
stopped. This car parking sensor circuit is quite easy and uses few commonly available components which
are listed below.
Required Components
• IC LM358 - 2
• 10k Resistor - 1
• 1k Resistor - 3
• 10k POT - 3
• 150 Ohm Resistor - 1
• Bread board - 1
• 9 Volt Battery - 1
• Battery Connector - 1
• LED - 3
• Buzzer - 1
• IR Pair - 1
LM358: LM358 is a Dual Low Noise Operational Amplifier which has Two Op-Amp in a single chip. This is a
general purpose op amp which can be configured in many modes like comparator, summer, integrator, amplifier,
differentiator, inverting mode, non- inverting mode and many more.
To design this car parking system circuit, we placed an IR transmitter receiver pair at the rear side of the car. IR
transmitter transmits Infrared signal or rays into the environment continuously. When these transmitted IR rays
reflect back to IR Receiver after striking on an obstacle, some voltage difference generates across this IR receiver
LED. This generated voltage difference depending upon the power of IR rays that are reflected back to the receiver.
More powered signal leads to more voltage difference. This voltage difference is used in our project to measure
the distance. Here more voltage difference indicates the lesser distance from the object. Here we have
shown distance from the obstacle by using three LED’s. Meaning of these LED’s are explained in working of this
project.
This system is placed at the rear of the car and sensor’s front side toward the obstacle (wall). Now suppose car is
moving back toward the wall or obstacle in the parking slot. If distance between car and obstacle is more than 15
cm then no LED will glow. Now if car moves toward the obstacle and suppose greed light turned ON, it means car
is about 15 cm away from the obstacle. Now car is moving more close toward the obstacle and yellow light appears
or turned on it means car is about 10 cm away from the obstacle. Now car is moving closer toward the obstacle and
red light appears it means car is about 5 cm away from the obstacle and same time buzzer start beeping. Buzzer and
red light indicates that the car need to stop now otherwise car may be damaged.