On Tue, Feb 15, 2011 at 8:19 AM, Bryan Horstmann <[email protected]> wrote:
> On 15/02/2011 02:03, Plastic wrote: > >> On Tue, Feb 15, 2011 at 7:56 AM, Tony Firshman<[email protected]> >> wrote: >> >> Bryan Horstmann wrote, on 15/Feb/11 13:42 | Feb15: >>> >>> On 15/02/2011 01:39, Plastic wrote: >>> >>>> On Tue, Feb 15, 2011 at 7:31 AM, Bob Spelten<[email protected]> wrote: >>>>> >>>>> On 14 Feb 2011, at 19:38, Plastic wrote: >>>>> >>>>>> ... I would be happy to design and manufacture a limited run of these >>>>>> >>>>>> adaptors to use CR2032s so we can all have our battery backed clocks >>>>>>> working again. >>>>>>> >>>>>>> Make sure the total height does not exceed the original. >>>>>>> >>>>>> I had to shave of the legs of the holder to make it fit the QL without >>>>>> contacting the metal keyboard plate. >>>>>> >>>>>> There is 7mm of clearance from the top of the ICs below the battery >>>>>> to >>>>>> >>>>> the >>>>> top of the tallest component., Most holders are 7.5mm tall. I have >>>>> selected >>>>> a surface mount, low profile holder that, with the PCB thickness, will >>>>> not >>>>> be taller than the surrounding components - which leaves 1.2mm of >>>>> clearance. >>>>> >>>>> Hope this helps... >>>>> >>>>> Dave >>>>> >>>>> It seems to me that only two pins connect the battery, the other pair >>>> being support; am I right? >>>> >>>> Yes. I have seen some builds of GC/SGC with a plus sign but I don't >>>> think >>>> >>> it is a=on all of them. Installation instructions will be needed. >>> >> >> I will do a 1-off design verification board. Yes, only the top left pin >> was >> +3.0v, and the other three were 0v. On the GC only the bottom right pin >> was >> connected, but on other designs, other pins may have been used. So the PCB >> will have the +ve pin, then all the ground pins will be linked. This way, >> the board will also fit other designs that used the same battery. >> >> Later I will remove the ICs and continuity test to confirm the board is >> electrically the same as appearance, as it is a 4-layer board and there >> may >> be a hidden via. >> >> I will include full, IKEA-style instructions :) >> >> Dave >> _______________________________________________ >> QL-Users Mailing List >> http://www.q-v-d.demon.co.uk/smsqe.htm >> >> >> ----- >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 10.0.1204 / Virus Database: 1435/3444 - Release Date: 02/14/11 >> > On my SAFT battery only two pins are connected, + and - , the other two are > isolated. > > Bryan > > On my SAFT example here (date code 97 12) there is a +ve indication top left but no -ve indication. All three other pins have continuity to each other. Is your different? Mine is labeled: =================== *+* SAFT memoguard 40 LF 220 Lithium 3V 97 02 =================== Dave _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
