Running a Proffieboard 3.9 from wall power

[profezzorn]

Every component in a proffie saber can handle 5 volts, except the battery. (accent leds may require slightly higher resistor values though.)

One way to make this work safely would be to print a battery replacement fob with a barrel jack in it. So you take the battery out, put the battery fob in, plug in the barrel jack in the battery and there you go… assuming you can find a space for the cable of course. Since the battery fob and the battery cannot be plugged in at the same time, it should always be safe.

There are other ways of course, but it gets a little trickier.

Related thread:

Safe v3 charing and running from wall power

I’m building my first Proffieboard v3 lightsaber, and I’m struggling to find a way to do what I’d like: safely charge the lightsaber from a wall wart, and power it at the same time (mostly for display purposes). For some context, I’m an EE, and have designed and built many small embedded circuit boards. One quick question: I’ve seen reference to the “manual.” Is that just this page? Is there anything more detailed? For example, what is JP1 for? Near as I can tell from various wiring examples (and the configurator tool), the battery is directly connected to the charge port in most installations. This implies you need a Lithium charge controller outside the hilt to safely charge the batteries. The Proffieboard has an on-board charge controller, but it’s only powered from Vbus, and the docs say it’s for USB charging. The longer I stare at the v3.9 schematic, the more it seems there’s no good way to safely charge the battery with an external wall wart. What do people use to charge? I’m considering adding a charge controller to my hilt that can just take 5V in and safely charge the battery. What do people generally do?