Recommend a good power line filter

Hi,
Can you recommend me good power line filter? I need a filter to protect my device from noise entering from the mains. There is a uC with ADC on the board and sometimes when an inductive load is switched ON/OFF on the same phase all things just freeze. There are a voltage supervisor and a watch dog timer but in the most cases they doesen't help

Re: Power line filter

CM600 said:

Hi,
Can you recommend me good power line filter? I need a filter to protect my device from noise entering from the mains. There is a uC with ADC on the board and sometimes when an inductive load is switched ON/OFF on the same phase all things just freeze. There are a voltage supervisor and a watch dog timer but in the most cases they doesen't help

Click to expand...

this is not sure to take away with line-filter (to low frequency)

check if you have earth loop problem (for example via connected computer).

If power supply to device have high capacitive coupling to low side and bad balaced cap between warm resp cold side on. resp side in transformers, can couple enough energi (pulse) jump to low voltage side in capacity way and go to nearest earth-coupling in third way (aka connected computer in most case) and this pulse is so high, voltage hopping and stopping your equpment.


Think hunting 50/60 Hz humm on your stereo but in wide frequency and take away possibly other way to power going to earth, like connection to stereo, CATV, computer etc. and see if working better in total floating state.

If so, you need galvanic isolations transformer on right point...