Go Down

Topic: Issue with HG7881 motor driver and HC-SR04 sensor (Read 82 times) previous topic - next topic


If i use the HG7881 and power up a motor, the readings of the HC-SR04 are totally wrong. I have read in another post that probably the h-bridge is poorly isolated and that i need a second power source to supply the sensor and motor driver separately.

Is there another way to isolate the h-bridge without adding a second power source?



Here is a picture of my setup. The notes represent the connections to the HG7881. The parts work on their own but i cant get them to work together with a single power source.

Any ideas?

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131