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I love using the Recom DC-DC Step Down converter (r-78b5.0-1.5) in place of a standard 7805 5v regulator, with Power Supply Option E: http://www.midibox.org/dokuwiki/doku.php?id=wilba_mb_6582_psuopte It's super efficient @ ~94%, so it doesn't require a heat sink, but it's a bit expensive @ ~$10.23 USD: https://www.mouser.com/ProductDetail/919-R-78B5.0-1.5 I noticed that you can find super cheap DC-DC converters on AliExpress for only a couple bucks: https://bit.ly/36LB0q9 Clearly, they're not quite as efficient @ 76-90%, but they look like they should do the trick. Any thoughts on these? 5V Description: Input voltage 6.5~40V,output 5V Maximum output current 1A DC-DC Step-Down Converter module working frequency 550KHz. efficiency is 76-90% . Quiescent current: about 1.5MA Overtemperature shutdown, input under-voltage protection, BS-voltage protection, and short circuit protection. 2.54mm pin pitch,Can directly replace the L78XX LM78XX TO-220 IC

I made this Voltage Regulator to have a variable Voltage from 1,25 to 12V.... music is from my tekkno-project "GreatFullTekk", i have different names for different genres and bands i am involved...(phatline, crimic, greatfulltekk, mjsigl, mms...) i always take own music creations for my videos... lukkely i have hundrets of it ;) i use it to drive a Hi-Voltage Generator - to field some plant seeds ( a expirment which i really want to check if there is anything true on it! - dont belivie it until you confirmed it ;) ) - music by Crimic