LV2
Converted a soldering iron to lithium power, pack welded with the UF20B — version 2
The wires in v1 were too thin and got hot, so this time I went with 2S 21700 plus a 30A BMS, and double-layer nickel strip.
This machine is seriously small — it sits in a corner of the bench without taking up space, recharges in a few seconds, and I welded 40 spots in a row without ever having to wait.
Best part when it was done: not a single spot needed re-welding.
Second version of my low-cost DIY soldering iron: upgraded to Li-ion power plus a printed shell, more convenient to useProjectsIoT Everything