Raspberry Pi LESSON 22: Measuring Distance with the HC-SR04 Ultrasonic Sensor
Announcing the Most Awesome Raspberry Pi Lessons of All Times! This time we RUMBLE!
In this class series, we will be using the most excellent Sunfounder Ultimate Raspberry Pi kit, available here: (Affiliate Link)
https://amzn.to/3tSk9Mo
or for our UK friends, https://amzn.to/3I5d401
In this lesson I will show how to do echolocation on the Raspberry Pi with the HC-SR04 Ultrasonic Sensor, from your Sunfounder Raphael kit. We show step-by-step instructions, and show how to code up the unit. We then show to to initiate a ping from the sensor, and how to detect its return, and measure the time of flight of the ping. I then show you how you can use the Ping Travel Time to calculate the distance between the sensor and a target. Enjoy!
If you want to grab those cool little straight jumper wires I am using to keep my breadboard builds neat and clean you can snag a box of them here:
https://amzn.to/36NyfHq
If you guys are interested in the oscilloscope I am using, you can pick one up here (affiliate link):
https://amzn.to/3v13Mhl
You guys get your hardware ordered so you can follow along at home!
You will also need a Raspberry Pi. I suggest the Raspberry Pi 4. If you do not already have one, this is the most suitable gear I could find:
https://amzn.to/3pBMfKm
The Raspberry Pi's are sort of pricy right now, so you can look on ebay or elsewhere to see if there are any deals. You will need a SD card. If you do not already have one, this is a good one:
https://amzn.to/3KcXTn2
I like using a wireless keyboard and mouse to have fewer wires. You can certainly use your USB keyboard and mouse, but if you want a nice wireless one, this one works on the pi. We demonstrate this by using a button switch to control a LED.
https://amzn.to/36Rv9Sk
You guys can help me out over at Patreon, and that will help me keep my gear updated, and help me keep this quality content coming:
/ paulmcwhorter
[Disclosure of Material Connection: I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. ]
#ultrasonic
#HC-SR04
#RASPBERRYPI
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