02-19-2021, 10:55 PM
I confess, forgive me for not searching thoroughly on the forum, there is probably already an answer: is it possible to use as a USB41 power supply when upgrading the 41cl?
(02-19-2021 10:55 PM)aurelio Wrote: [ -> ]I confess, forgive me for not searching thoroughly on the forum, there is probably already an answer: is it possible to use as a USB41 power supply when upgrading the 41cl?I do not see why not, still, the 41CL is very well protected against power failure, the most you can temporary loose is a Flash sector (8x4K) that will be re-flashed when the update is restarted again.
(10-29-2017 08:14 PM)JurgenRo Wrote: [ -> ](10-29-2017 07:41 PM)rprosperi Wrote: [ -> ]Of course this will depend on how many ROM images need to be updated in each machine, however you can definitely get at least 2-3 complete updates, even for CL units from very early on.
I have done several update cylces with >200 ROM images to be updated on a single set of batteries, and then used it often for weeks after that, all on one set of batteries.
I keep a new set of 4xN batteries ready nearby my work area, but I would not expect to need them for just upgrading 2 machines.
You might even want to hook up your 41CL via a USB power module to a permanent power source during update. The idea is by Diego Diaz. Find the schematics to build one here: http://www.hpmuseum.org/cgi-sys/cgiwrap/...722#183722 You will need a doner HP-module for it.
Juergen
(02-23-2021 05:14 PM)burkhard Wrote: [ -> ]It's been a while since I've updated my 41CL's flash (shame!), but I believe the last few times I've done it, I indeed used my USB-41 as an additional power supply. I'm pretty sure it works fine.I've done this time the calculators' upgrade without the extra power, because I got trouble while doing the 41CL basic setup and particularly PLUG(ging)1L the YFNX... I got a message... , something like "the port you are trying yo use is already busy" .. of course in a shorter form . Maybe I should have just swapped the USB41 port , or erased the module before to use it like a simple power source to avoid whatever conflict ..
(02-24-2021 08:22 PM)aurelio Wrote: [ -> ]Maybe I should have just swapped the USB41 port , or erased the module before to use it like a simple power source to avoid whatever conflict ..Hein ? ... ok ... I thought from the beginning that you were talking about using a Power-41 module but with your last comment I just realized that is was about the USB-41 module, DOH!
(02-24-2021 09:18 PM)Sylvain Cote Wrote: [ -> ]Sylvain thank you once more for your help as always, i can say just that the calculator + the USB-41 module without cells or batteries works perfecltly, just shows the BAT annoucer .(02-24-2021 08:22 PM)aurelio Wrote: [ -> ]Maybe I should have just swapped the USB41 port , or erased the module before to use it like a simple power source to avoid whatever conflict ..Hein ? ... ok ... I thought from the beginning that you were talking about using a Power-41 module but with your last comment I just realized that is was about the USB-41 module, DOH!
I have to check to see if the USB-41 module is providing power to the calculator, not sure about that, actually I would expect it would not.
In any case, I never use any external power source when I update my 41CL's and I never got any problem.
I even did an update with depleted cells just to test the scenario, for sure I temporary lost a Flash sector but as soon that I put back recharged cells and restarted the update process, the Flash sector got reprogrammed correctly.
Sylvain
(02-24-2021 09:28 PM)aurelio Wrote: [ -> ]"-USB-41 can provide power undefinitely without batteries inserted, even when running a program continuously (tested for more the 24 hours) provided no other devices are connected."I had found the post but did not read it to the end, I now stand corrected! Thank you Aurelio.
you can find it here