I have a question... I want to reduce noise in the

Question

I have a question... I want to reduce noise in the

data trace that is feeding me 0-3.3VDC at around 2mA...

The data trace has to go under a relay and sometime the turning on/off the relay sends high voltage due to magnetic flux in the data trace, the data trace is also long around 10cm... I cannot reduce the size of that trace without increasing the length of high voltage trace (which is not a good idea)...

I have double diode at 3.3V and GND, which should reduce noise at the same time I have 10uH inductor in series, which should also reduce the noise...

Should I put a 10mF capacitor to make sure the noise is completely removed?

My ESP will not check the data for more than once every 5 seconds so I don't need to to change really fast...

Suggestions will help

0

15.02.2024

11 ответов

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Talula Автор вопроса

D
Use a mosfet instead

MOSFET? How?

0

9 месяцев назад

D

Talula
MOSFET? How?

Changeover from relay to mosfet

0

9 месяцев назад

Talula Автор вопроса

D
Changeover from relay to mosfet

No, that isn't possible, MOSFET don't work with AC voltages and 40A TRIAC are more expensive than relay.

0

9 месяцев назад

D

Talula
No, that isn't possible, MOSFET don't work with AC...

They do. What about inverters?

0

9 месяцев назад

Aneesh

no way to make the data trace go around the relay lines ?

0

9 месяцев назад

Talula Автор вопроса

Aneesh
no way to make the data trace go around the relay ...

That I did...

0

9 месяцев назад

Aneesh

Talula
That I did...

easiest thing might be to just route the data lines away from the relay line, have some ground between them, or stitch some ground vias around the data lines to shield them bit better.

0

9 месяцев назад

Talula Автор вопроса

Aneesh
easiest thing might be to just route the data line...