I thought I would try one of these DIY Buck LM2596 CC/CV Li-Ion Charger boards as a little project today.
It seems quite interesting as it can charge to any li-ion voltage and has adjustable termination and current selectors.
I have some of these small metal tins and decided to make a case for the charging board.
The tin has a round neo magnet epoxied to it and a matching magnet on the board heatsink pad to wick away some heat.
There is also a rectangle magnet on the lid for holding the cells in place or the screwdriver bit when not in use.
The two charger leads have magnets soldered on to them and epoxy on the back, they are set to repel each other.
Kept in the tin is also a leatherman flat bit for adjusting the various dials on the board.
The great thing about the extra meters is that it’s a lot more conveinient to setup the charge voltage and current, just plug it in and adjust the pots while watching the display instead of using a DMM.
It also serves as a quick battery voltage checker.
The tin is insulated with stickyback felt.
Some more refinements – potted the board and added larger magnets, one fixed & insulated to lid