#103 HC-SR04 Ultrasonic Obstacle Avoidance and Range Finder (fun!)
4,646 views · Published 19 January 2018 · 30:38 · Indexed 22 September 2026
Channel: Ralph S Bacon · 2018 · Science & Technology
My 2WD (two-wheel drive) buggy needs some sort of obstacle avoidance sensor so the HC-SR04 I've had in my components drawer since my PIC days came out. Using this ultrasonic detector is easy and gives accurate distance results up to about 3cm from the device. In this video we've added it to the 2WD buggy we're slowly building (very cheap kit from the Gar East) and this gives it obstacle detection capabilities. The sketches I used (first one without a library, second one with the NewPing library) are here in this GitHub) https://github.com/RalphBacon/HC-SR04-Ultrasonic-Sensor Where I bought a pack of 5 HC-SR04s (UK site but readily available) https://www.amazon.co.uk/dp/B01M0QL1F1 And where I SHOULD have bought them if I had had the time https://www.aliexpress.com/item/hc-sr04-ultrasonic-ranging-module-smart-car-ultrasonic-sensor-module/32531458441.html Where I bought the laser cut mounting bracket http://www.ebay.co.uk/itm/262069871882 The Far Eastern version of the laser cut mounting bracket (you can get them in RED and YELLOW too!) https://www.aliexpress.com/item/Cartoon-Ultrasonic-Sensor-Mounting-Bracket-for-HC-SR04-Smart-Car-Red-Blue-Color-free-shipping/1954761236.html The UK eBay link for the 3D printed mounting bracket http://www.ebay.co.uk/itm/152275416269 I couldn't find a Far Eastern version of the 3D printed one, so if you do find one please do post it in the comments under the video! Finally, if you really are that interested here's the location of that "wiring_private.h" file: C:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino --- If you like this video please give it a thumbs up, share it and if you're not already subscribed please consider doing so :) My channel is here: ------------------------------------------------------------------ https://www.youtube.com/c/RalphBacon ------------------------------------------------------------------ How can I remember this? Memory tip: "See" Ralph Bacon, geddit? You can also use this link: https://www.youtube.com/RalphBacon