I was thinking of making my own dc/dc converter for my laptop. The original Lenovo charger can give 20 V at 4.5 A. I I have a few questions: right now I wanna build a 12 volt to 20 volt converter. I have been looking at boost and buck converters but I don't know what toroid to use or how many windings or what electrolytic capacitor to use. I have a lot of electrolytes form disposable cameras, maybe I could use them. I also found this on ebay. would it work? https://www.ebay.com/itm/150W-DC-DC-Boost-Step-Up-Converter-12V-32V-to-15V-35V-24V-6A-Laptop-Power-Supply/262983318200?hash=item3d3b06fab8:g:fg4AAOSwIaFZFtCT
I have been looking at Powering laptop from 12V sources without inverter
the cuicuit in this post looks to complicated for me.
I rather wanna build my own using arduino or a 555 timer instead of buying a new , to learn , thanks. Hope it wasent to long