My cheap AliExpress LED dimmers are noisy. Not audibly, but they output a lot of EMI (?).<\/p>\n\n\n\n
One of my (triac?) dimmers has multiple Philips bulbs on it. When I turn it on, I can hear a loud chopping noise on my headphone amp.<\/p>\n\n\n\n
Another dimmer is in the same socket as the amplifier for my speakers, and the cables run closely parallel to each other. When I use this dimmer, I can hear the same chopping noise on my speakers, and at a little lower volume I can hear it on my headphones too.<\/p>\n\n\n\n
I’m thinking of modifying the dimmers by adding a coil to them. I’ve never used them before but I have a big box of de-soldered ones from when I first got a soldering iron and liked to disassemble things.<\/p>\n\n\n\n
What I need, short of getting better dimmers, is probably a lamp debuzzing coil in series. There might not be enough space in the little dimmer modules to add an inductor, though. The dimmer running to multiple bulbs already has a junction box that I can put it in, so I can experiment with that one first. The coil should go on the load side (or at least not between the dimmer and the load).<\/p>\n\n\n\n
I have no idea how to calculate the ideal inductance value, and I probably can’t even measure the inductance of the ones I have, so I should just experiment with a few different ones to see which solve the problem without affecting the dimming.<\/p>\n","protected":false},"excerpt":{"rendered":"
My cheap AliExpress LED dimmers are noisy. Not audibly, but they output a lot of EMI (?). One of my (triac?) dimmers has multiple Philips bulbs on it. When I turn it on, I can hear a loud chopping noise on my headphone amp. Another dimmer is in the same socket as the amplifier for […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,52],"tags":[],"class_list":["post-298","post","type-post","status-publish","format-standard","hentry","category-electronics","category-quieting-led-dimmers"],"_links":{"self":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=298"}],"version-history":[{"count":5,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/298\/revisions"}],"predecessor-version":[{"id":607,"href":"https:\/\/invar.nl\/index.php?rest_route=\/wp\/v2\/posts\/298\/revisions\/607"}],"wp:attachment":[{"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/invar.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}