Difference between revisions of "Ultrasonic Sensor (HC-SR04) + Raspberry Pi"
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Line 7: | Line 7: | ||
==Wire setup== | ==Wire setup== | ||
+ | There are four pins on the sensor that need to be connected to the pi | ||
+ | # VCC to Pin 2 (5v - power) | ||
+ | # GND to Pin 6 (ground) | ||
+ | # TRIG to Pin 12 (GPIO18) | ||
+ | # The 330Ω resistor to ECHO. | ||
+ | ** On its end, connect it to Pin 18 (GPIO24) | ||
+ | ** Through a 470Ω resistor, connect it also to Pin6 (ground). | ||
+ | *** This is done because GPIO pins only tolerate maximal 3.3V | ||
[[File:Wire setup.png|250px|thumb|none|Connecting resistors and jumper wires between sensors and pi]] | [[File:Wire setup.png|250px|thumb|none|Connecting resistors and jumper wires between sensors and pi]] |
Revision as of 18:04, 2 May 2017
Hardware
- Raspberry pi 3
- Ultrasonic Sensor - HC-SR04
- A set of resistors for each sensor you are connecting
- 330Ω and 470Ω
- Jumper wires to connect the sensor(s) to the pi
Wire setup
There are four pins on the sensor that need to be connected to the pi
- VCC to Pin 2 (5v - power)
- GND to Pin 6 (ground)
- TRIG to Pin 12 (GPIO18)
- The 330Ω resistor to ECHO.
- On its end, connect it to Pin 18 (GPIO24)
- Through a 470Ω resistor, connect it also to Pin6 (ground).
- This is done because GPIO pins only tolerate maximal 3.3V
Software
Python
Create a new script
- Link to repository with script to detect the distance of an object in front of the sensor
Save your script as ultrasonic_distance.py
- Go to File and click on Save as
- In the field Save in browse for the C: drive and then select a folder to save in
- For the field File name type in ultrasonic_distance.py
- In the field Save as type select All Files
- Click on Save
Use the terminal to run the script
- Click on the monitor icon on the top of the screen
- Type cd "folder name" to change directory to your pythonpractice folder, and hit Enter
- Type ultrasonic_distance.py and hit Enter to run your program