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by prahas.programming
Mon Dec 31, 2018 10:58 pm
Forum: Automation, sensing and robotics
Topic: Problems with the HC-SR04 Ultrasonic Sensor
Replies: 15
Views: 16923

Re: Problems with the HC-SR04 Ultrasonic Sensor

Its designed for 5v not 3v3, if you have it connected to 3v3 then try upping that to 5v (but add a voltage divider to the echo pin to protect your GPIO). (See Joan's graph , 3rd post on the 2nd page of this thread). I wasn't happy with the results so plugged the unit into the 5V supply rather than ...

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