Recent content by mmu_man

So, just confirmed on my PB520c, Vbatt is drawn almost directly to charge the battery (it drops at 11.7V), but it's disconnected when it thinks it's fully charged, so I only have to implement current limiting, not a full charge control.

Just tested myself for the sake of it, it happily triggers overcurrent protection at 1.3A if I let it charge on a bench supply. So definitely needs some circuit to calm it down.

Updated the model to make it easier to assemble with the meter.

So, the only thing I hate more than people forcing me to published unfinished work because they are redoing what I spend nights already doing, is people wasting time doing what I already did… https://github.com/mmuman/cad-mac-pb500-pwrconn Oh, and a voltmeter variant, because people love...

So, instead of just doing the math and applying the datasheet for the chip I found, I started writing a KiCad plugin to do that for me… Someday I should just do stuff instead of spawning other projects :LOL:

So, as discussed on MLA, and I tested it, it seems the battery is hooked directly on Vbatt without any current limiter in the laptop, so if we want to charge as well I'll have to design some PCB to add inside. I think it's possible. 🤞 So, someone confirmed using 15V Vmain without trouble for a...

I started designing the connector years ago but never really finished, I planned on using step-down boards and designing a case, much like @PotatoFi ended up doing for the 1xx series. I was a bit reluctant to sending only 15 volts, and I'd have liked to be able to check on schematics, but I...

I dug an old unfinished thing… and tweaked it a little… spoilers!

What about https://oldavista.com/ ? :D

On a request by @XodiumLabs I made this little base to light up your G4 Cube. You can find photos on Xodium's Cube thread. The files are on Thingiverse, and on MS GitHub. You can adjust the height and thickness on the OpenSCAD model.

Like last year there will be a retro devroom, the CfP is here.

I also noticed that after taking care of my LC-III, on the next one I noticed that and went back to fix it. It seems people "discovered" that just now again. 🤷‍♂️

In case you missed it, the FOSDEM RetroComputing devroom CfP is out. Deadline is December 1st. It will take place in Brussels on February 2nd.

Indeed, that's what egretrom does (it's linked to from the thread's first post and the image contains source code): thePB.pbCmd = 0x2; /* read 6805 memory */

Actually it seems I posted it on this same thread in 2023 😅 Thanks :)