Ah, OK; so you're going to connect J8-2 to -8 or -9? I think this time I'd have added a jumper on the board instead of replacing the regulator but yes that's a flying lead (but it doesn't fly far ;-). Interesting hack to be sure, if you're going to replace the RAM chips anyway and don't need power for the display. m ----- Original Message ----- From: "didier derny" <didier@aida.org> To: <cbm-hackers@musoftware.de> Sent: Wednesday, October 12, 2016 4:40 PM Subject: Re: apprentice sorcerer... >I need +5 in place of +12 for the 4164 > > the idea is to replace the 12v regulator by a 5v regulator :) > > so this way the board look the same :) and no flying wire between +5 > and +12 > > > just a little adaptor to connecte the 9v power supply on J8 > > something easy to remove > > > > > > > On 12/10/2016 22:34, Mike Stein wrote: >> So, you're going to use a 9V supply in the final version instead of the AT(X) ? Sounds good, but why *two* regulators? >> >> m >> >> ----- Original Message ----- >> From: "didier derny" <didier@aida.org> >> To: <cbm-hackers@musoftware.de> >> Sent: Wednesday, October 12, 2016 3:28 PM >> Subject: Re: apprentice sorcerer... >> >> >>> the atx power supply is connected with flying wires... >>> >>> >>> some people blew a fuse when they saw a cherry tree :) >>> >>> for me it's when I see flying wires :) >>> >>> >>> I guess I can have something nice with a single tension +9v >>> >>> >>> On 12/10/2016 21:19, Mike Stein wrote: >>>> Why do you need regulators if you're using an ATX supply? >>>> >>>> m >>>> >>>> >>>> ----- Original Message ----- >>>> From: "didier derny" <didier@aida.org> >>>> To: <cbm-hackers@musoftware.de> >>>> Sent: Wednesday, October 12, 2016 2:38 PM >>>> Subject: Re: apprentice sorcerer... >>>> >>>> >>>>> Hi :) >>>>> >>>>> I dont have any display only a motherboard :) >>>>> >>>>> actually composite interface on flat screen... >>>>> >>>>> in a few ways on vga... >>>>> >>>>> yes reversible no flying wires, no tracks modified... >>>>> just a swap of a few components... >>>>> >>>>> >>>>> >>>>> >>>>> On 12/10/2016 19:39, Mike Stein wrote: >>>>>> All reversible of course... ;-) >>>>>> >>>>>> How are you powering the display? >>>>>> >>>>>> m >>>>>> >>>>>> ----- Original Message ----- >>>>>> From: "Didier Derny" <didier@aida.org> >>>>>> To: <cbm-hackers@musoftware.de> >>>>>> Sent: Wednesday, October 12, 2016 6:16 AM >>>>>> Subject: apprentice sorcerer... >>>>>> >>>>>> >>>>>>> hi >>>>>>> >>>>>>> I'm thinking to the following modification on the cbm 8032 motherboard >>>>>>> reinstall a regulator for 5v (switched version) >>>>>>> reinstall a 5v regulator in place of 12v (switched version) >>>>>>> Inject +9v DC on the power supply connector for both 5v and 16v... AC >>>>>>> >>>>>>> I hope to get: >>>>>>> +5v normal place >>>>>>> +5v in place of 12v >>>>>>> nothing on -5v >>>>>>> a bit less than 9v unregulated (for tape) >>>>>>> >>>>>>> I did something similar on a tandy coco 2 and it works fine... >>>>>>> >>>>>>> any idea ? (the power supply of the cbm is more complex that the one on >>>>>>> the coco)... >>>>>>> >>>>>>> -- >>>>>>> didier >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> Message was sent through the cbm-hackers mailing list >>>>>> Message was sent through the cbm-hackers mailing list >>>>> Message was sent through the cbm-hackers mailing list >>>> Message was sent through the cbm-hackers mailing list >>> >>> Message was sent through the cbm-hackers mailing list >> Message was sent through the cbm-hackers mailing list > > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2016-10-12 23:00:02
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