Does seem likely that the modem would normally be shut down. I didn't test running the modem as I doubt I'm likely to use it. :-) On Dec 10, 2015 9:02 PM, "Peter Vollan" <dprogra...@gmail.com> wrote:
> I can tell you that when I used to call BBSs at 300 baud with my Model > 100, the AA batteries seemed to drain quickly. > > On 9 December 2015 at 05:08, Josh Malone <josh.mal...@gmail.com> wrote: > > I noticed no change in the power draw on my 102 when using the serial > port, > > although it wasn't actually connected to another device. > > > > On Dec 9, 2015 1:06 AM, "John Whitton" <jwhit...@bellsouth.net> wrote: > >> > >> Mike, > >> > >> M102, and it was running its own monitoring program, that's how it > (I) > >> knew run time. When it pooped out, the last time was recorded. It was, > in > >> fact , monitoring its own battery voltage via an ADIOS. One might argue > that > >> the RS-232 ate some power, but it was only OPENed when making a > measurement > >> at 5 minute intervals, then closed. > >> > >> If you recall, I also (later) embedded an A/D in a M102, which can > >> measure both external voltages as well as monitor battery voltage. I > could > >> run the same test now, without having to hook anything up at all. Cheesy > >> video of that: https://www.youtube.com/watch?v=HMV2HKwrCCc > >> > >> John W. > >> > >> ----- Original Message ----- > >> From: Mike Stein > >> To: Model 100 Discussion > >> Sent: Wednesday, December 09, 2015 12:50 AM > >> Subject: Re: [M100] M100 power requirements > >> > >> Was this an M100 or a 102, and what if anything was it running? > >> > >> Looks like an app for the ADIOS ;-) > >> > >> m > >> > >> ----- Original Message ----- > >> From: John Whitton > >> To: Model 100 Discussion > >> Sent: Tuesday, December 08, 2015 11:04 PM > >> Subject: Re: [M100] M100 power requirements > >> > >> *?* > >> > >> Hmm. I do not recall, but I'm betting that the supply was tied to > the > >> battery terminals, otherwise I would have had to make up a pigtail to > use > >> the jack. I wouldn't bet my life on that... > >> > >> As an aside, I attach here a plot of battery voltage vs. time. This > >> was recorded using fully charged 2400mA NiMH batteries. Cutoff occured > at > >> 1407 minutes. Note the abrupt knee at the end of the useful battery > >> charge/energy. That is characteristic of NiMH batteries. Alkalines have > a > >> more gradual slope > >> > >> John W. > >> > >> > >> > >> ----- Original Message ----- > >> From: Josh Malone > >> To: Model 100 Discussion > >> Sent: Tuesday, December 08, 2015 6:14 PM > >> Subject: Re: [M100] M100 power requirements > >> > >> Awesome, thank you. Any idea if this was measured with supply connected > to > >> the dc jack or the battery terminals? > >> > >> On Dec 8, 2015 5:53 PM, "John Whitton" <jwhit...@bellsouth.net> wrote: > >>> > >>> FWIW, find attached a .pdf graph of M102 power consumption. This was > >>> compiled 6 years ago (hard to believe). > >>> > >>> John W. > >>> > >>> ----- Original Message ----- > >>> From: Josh Malone > >>> To: Model 100 Discussion > >>> Sent: Tuesday, December 08, 2015 4:02 PM > >>> Subject: Re: [M100] USB "juice pack" > >>> > >>> I just tested the power requirements of my 102. With the battery > >>> connectors connected to a bench supply at 5 volts, it draws a very > >>> consistent 65mA. I was expecting the current to vary slightly with CPU > or > >>> screen activity but it does not. I'm so used to CPU idle states which, > of > >>> course, the 8085 does not use :) > >>> > >>> I have one of these kicking around at home > >>> (https://www.sparkfun.com/products/10968) so I'm thinking to > construct a > >>> LiPo-based AA battery replacement so I can recharge my 102 via USB. > There's > >>> also https://www.sparkfun.com/products/11231 but that's capable of > WAY more > >>> current than necessary and considerably more expensive. > >>> > >>> -Josh > >>> > >>> On Thu, Dec 3, 2015 at 7:00 PM, Mike Stein <mhs.st...@gmail.com> > wrote: > >>>> > >>>> > >>>> Yeah, I was wondering about that, especially with WiFi; definitely > >>>> sounds a little high. Too bad. > >>>> > >>>> Maybe Jeff's solution isn't such a bad idea after all ;-) > >>>> > >>>> Anyway, the M100 works fine on a "juice pack". > >>>> > >>>> m > >>>> >
