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PSoC 4 MCU

dhsa_4485611
New Contributor

Hi,

We are facing the issue of MCU hanging due to noise in the ground while operating the relay.

We want to resolve this issue with help of an expert.

How to get expert development support for PSoC 4 family?

 

 

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1 Reply
VenkataD_41
Moderator
Moderator

Hi,

The general problem with using relays connected to microcontrollers is conducted noise immunity problem. When relay switches it generates pulses of voltage which travels across the power supply and reach the microcontroller.

Please refer the following appnote for complete details and mitigation techniques of this problem.

https://www.cypress.com/documentation/application-notes/an80994-design-considerations-electrical-fas...

Thanks

Ganesh

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