📌 Modified ATX (PC PSU) for car amplifier - 14V output - SDC 2921 IC - скачать видео с ютуба бесплатно по ссылке

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Modified ATX (PC PSU) for car amplifier - 14V output - SDC 2921 IC

Do this at your own risk, this isn't a tutorial or guide! I just showed what i did to mine, i am not responsible for any damage, fire or even a death. I used old 300W psu with step up module and everything worked fine for some time, but unfortunately i somehow blew mosfet on it. Instead of buying new step up module i just ran it without it, but output was really weak since voltage was at best 11.8v and it kept dropping to 10v (undervoltage protection was really bad on it) . So i took my other power supply (500w no name model) which i had in closet since that one kept shutting off with few watts on the output. My first thought was to disable undervoltage and overvoltage protection, but while i was looking at datasheets i thought maybe i could somehow raise voltage on output. Googling for few minute revealed me that i should just look for OP amp that is used for feedback loop. Since this psu had all on one IC it was pretty simple to find voltage divider and change one resistor with potentiometer. First i tried to get 14.4V which was not a problem, just few turns of potentiometer, but voltage was dropping to 13.3V when bass hits, so i turned it a bit back to 13.8v and now its dropping down to 13.1V but psu is much happier with this. I just need to add external fuse since it has no protection at all (only fuse on amplifier), and in case of short circuit on the output whole thing could burst in flames (which i hope it wont). If you want to try something like this, here is list of links that might be usefull to you : • HACKED!: ATX Power Supply with Variable Ou... https://hackaday.com/2013/08/30/disab... http://burnt-traces.com/?p=159 https://www.eevblog.com/forum/beginne... http://www.planetimming.com/atx_mod/a... Song - Chinatown Instrumental - Decaf Higher power amplifier test (full output power) • Testing Modified ATX Psu With New Amplifie... Box build video • T-Line Subwoofer Box Build - 12” Ground Ze...

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