Hello guys, I finally finished building the UPS. I hope it will be useful. It has 2 outputs of 12V and 19V and it's very powerful.
Feel free to visit https://jlcpcb.com to order professional PCBs at low prices for your projects. $2 - 2Layers 5pcs; 4&6Layers starting at $5.
A big THANK YOU to all my patrons, especially to: Richard Fjellvang, David, Max Rice, Razvan Alexandru, Jacek, techge, Anthony Ortenzi.
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Full schematic: https://i.imgur.com/aRKuvr5.png
List of components:
Project box 200*120*75mm: https://s.click.aliexpress.com/e/_DllO4cp
HG2 18650 3000mAh cells: https://s.click.aliexpress.com/e/_ArzHnn
18650 cells holders: https://s.click.aliexpress.com/e/_DemYa1D
4S battery indicator: https://s.click.aliexpress.com/e/_DesJLnd
4S BMS with balance: https://s.click.aliexpress.com/e/_9gEfjB
Rocker switch: https://s.click.aliexpress.com/e/_98sHdO
12V relay: https://s.click.aliexpress.com/e/_DmyevaZ
Heatsink 20x14x11mm: https://s.click.aliexpress.com/e/_oBSQ66z
Mini360 buck converter: https://s.click.aliexpress.com/e/_oDGhTEd
Fuse holders: https://s.click.aliexpress.com/e/_Deo0Cnb
1N5404 diodes: https://s.click.aliexpress.com/e/_ANVBhF
2200uF 25V capacitors: https://s.click.aliexpress.com/e/_Dkr7FdX
XL4015 buck converter: https://s.click.aliexpress.com/e/_opIriGX
XL4015 CC/CV charger: https://s.click.aliexpress.com/e/_DFdrVJT
150W boost converter: https://s.click.aliexpress.com/e/_DCX4H7j
5.5x2.1mm jack (male, 22AWG): https://s.click.aliexpress.com/e/_Dmqj3G5
5.5x2.1mm female connector: https://s.click.aliexpress.com/e/_omTRsZL
4.0x1.7mm jack: https://s.click.aliexpress.com/e/_oFG0YzJ
4.0x1.7mm female connector: https://s.click.aliexpress.com/e/_Dnlqv5J
M3 standoffs 300pcs: https://s.click.aliexpress.com/e/_oCljU81
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