COOLING POWERRRR brings out my EVIL LAUGH 😈

Test firing a higher-powered blower made from a salvaged Shark dust buster and a home-rolled housing. 8.24.22 NOTE: this is an old post that was just unlisted, but I listed it since my catalog of compressor videos is growing anyway. The impeller is from a Shark SV780; the housing (intake stack, volute with gasket and screw-on seal, and nozzle with lock ring) is homebrew and unpublished. I've been using this blower for speedboating for a while, sometimes under the moniker "ubercooler", by controlling it with a generic MKS MOSFET board and a 12V power supply. The dust buster fed it 18V, and even at 12V it draws enough amps that a 12V 20A supply cannot start it and heat up a 12A bed simultaneously (I nearly had a heart attack when I found this out the hard way, but thank goodness it didn't actually blow up my PSU, just shut it off). It sounds like crap, or at least like a vacuum cleaner, but it gets the job done, and it only cost the PLA for the housing since I already had the dust buster. Even so, I'm developing a more fully-printed replacement, since it's pretty choked by my cooling setup, the current draw is really high, the sound IS a problem, it doesn't really run below 50%, and its motor really heats up the output air. I also found out in August 2022 that its stock smoothing capacitor was not well-suited for long-term low-PWM driving (I assume the source dust buster did not use PWM but was just on-off) because it exploded after 40 minutes at 60% and 3k hz PWM frequency. That's just part of the learning curve -- I had no idea what the cap was for and decided to leave well enough alone until something went wrong ... and it did, woo another heart attack! I'll replace it with some smaller ceramic caps and it should be good (it works without, too) ... but this is why I don't typically publish niche designs right away! That cap explosion was loud, scary, stinky, and who knows what it did to my cancer risk...

[@spsully2582]

Lol @ Evil laugh

[@jamespray]

Absolute power corrupts absolutely, lol