HC-SR04 Ultrasonic Rangefinder Mounting Bracket

by Matter153, published

HC-SR04 Ultrasonic Rangefinder Mounting Bracket by Matter153 Jul 22, 2015
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This is a mounting bracket for the HC-SR04 sonar range finder. This bracket is designed to have the rangefinder snap into place and protect the sensor from shorts. The bracket has two mounting holes the perfect size for #6-32 screws, although the size of the holes can be enlarged considerably with a drill. I designed the part in inches with the intention to scale the part by 25.4, but have found that if you scale it by 26 you have the best results. To protect your rangefinder further, I made sure there was enough space to insert a piece of a foam paper plate cut to size to help with vibration. The bracket completely covers the back of the rangefinder, allowing you to mount it directly onto metal without having to worry about shorts. Tips are welcome! I am a college student and every dollar goes a long way in furthering my education.


I used a Prusa i3 with PLA filament at a .2mm layer height and it printed in around 30 minutes. The sensor easily snaps in the bracket without the need of screws. If you cut a piece of a foam paper plate to put behind the sensor it helps considerably with vibration if you are using this with a robot. Scale the part by 26 if you use PLA and slightly more if you are using ABS.

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I had a project where I needed to mount a whole bunch of HY-SRF05 ultrasonic sensors. The mounting holes provided are worthless for that purpose and thus the search for another solution. This turned out to be just the ticket -- though I had to make a small modification to account for the fact that the HY-SRF05 has 5 pins instead of 4. Easy enough to open up the gap by another tenth of an inch. The first one printed was in PLA just to see if it would suit. I printed several in ABS -- had to scale it up to account for the greater shrinkage of ABS but it worked great. The balance were printed in PETG. PETG is more flexible -- which is an advantage when popping the sensors in and out. Anyway, this design was just the thing for my needs. Thanks!

Glad it worked so well, good luck on your project!

Thanks--just what I needed. I did flip the layout on its back for printing vice going vertical.

You are welcome, hope it works well for your project!

What do you use the ultrasonic range part for?

Its used in motion sensing and distance measuring. I hook mine up to an Arduino, but there are other programmable microcontrollers to choose from. It returns a distance value for every iteration of its code loop. Useful for robot obstacle avoidance.

Got one of these printed in PLA, but I can't seem to get the sensor to actually snap in. the prongs are too stiff and dont bend out enough. I'll try scaling it up a bit and see if that fixes it.

Ive noticed some rangefinders arent sanded on the sides, so they will be slightly wider. If scaling up doesnt work , try sanding the sides of the board.