2020년 4월 19일 일요일

LED headlight - Radio noise filter

After installing a pair of retrofit LED headlight bulbs, I started getting noise when listening FM radio using my care stereo. The RF noise is from the driver circuits of the LED bulbs, which use high frequency switching similar to the RF radio frequency.

So I decided to design a passive filter, which I found very effective to block the noise. Now, after installing the filters, the radio noise is completely gone.




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