phh@uoregon.uoregon.edu (paul henry harrison) (02/11/89)
Summary: Expires: References: <2650@udccvax1.acs.udel.EDU> <13428@cup.portal.com> <13552@cup.portal.com> <3117@silver.bacs.indiana.edu> <14505@cup.portal.com> Sender: Reply-To: phh@drizzle.UUCP (paul henry harrison) Followup-To: Distribution: Organization: University of Oregon, Computer Science, Eugene OR Keywords: Hello! I have tried to post this once before. I believe it was destroyed. I am looking for information on constructing a battery-powered, portable 130 XE. The main problems I face are the power input and the Video output. It is possible that I will be able to use it will emplaced video screens, therefore that part is not as essential as the battery power. I would like to be able to use a set of 9 volt, C, or D batteries (preferably 9 volt), to power a 130XE computer. Any plans or (preferably) schematics for such a device would be, to say the least, greatly appreciated. Internal power supplies would be best. On the subject of video output, any form of output to a low-power LCD screen (such as used in the Toshiba 1100 and other, similiar Laptop machines) would be wonderful! Thank you for any help you can give. ||| Disclaimer: I am in no way affiliated with either Atari Corp.,e ||| , or any other group or organization that might not ||| agree with my opinions. / | \ | \_
ken@hpclkms.HP.COM (Kenneth Sumrall) (02/16/89)
/ hpclkms:comp.sys.atari.8bit / phh@uoregon.uoregon.edu (paul henry harrison) / 10:59 pm Feb 10, 1989 / >I am looking for information on constructing a battery-powered, portable >130 XE. The main problems I face are the power input and the Video output. >It is possible that I will be able to use it will emplaced video screens, >therefore that part is not as essential as the battery power. > >I would like to be able to use a set of 9 volt, C, or D batteries >(preferably 9 volt), to power a 130XE computer. Any plans or (preferably) >schematics for such a device would be, to say the least, greatly appreciated. Gook luck. Your gonna need it. The problem is that the 6502 CPU in the Atari is made in NMOS technology. NMOS is not the power miser that CMOS is. I don't know this for sure, but I suspect that all of the major chips in the 130XE use NMOS. I do know that the power supply for the XL and XE computers is rated at 5 volts, 1.5 amps. Small batteries aren't made for such a high current draw. A 9 volt battery definately will not suffice. When my power supply blew ~2 years ago, I went to Radio Shack and bought a 6V lantern battery, and hooked it up to the power connector directly. This only gave me about 5 hours total usage before it started dying. As it died, the voltage dropped, and I had to constantly adjust the color trim pot to keep the background color blue. So, if you want battery power, you will need 2 things: 1) A BIG battery. It should have a larger Amp-hour capacity than the lantern battery I used. 2) A voltage regulator, unless you don't mind constantly adjusting your color trim pot as the voltage drops. :-) Unfortunately, a battery powered Atari is not a reality. >On the subject of video output, any form of output to a low-power LCD >screen (such as used in the Toshiba 1100 and other, similiar Laptop >machines) would be wonderful! Again, this is not meant to be. The GTIA chip only puts out NTSC video (in the USA), and I don't think there are any NTSC compatable LCD screens readily available. If anyone knows of any, please let me know. Ken "I want a CMOS Atari" Sumrall ken%hpclove@hplabs.hp.com ...!hplabs!hpclove!ken
cs4521as@ariel.unm.edu (Analog Daemon) (02/18/89)
From the number of flames and people wanting Python lore, perhaps it's time to call for discussion rec.arts.monty-python? ___________________________________ _________________________ / They're growing mechanical trees \/ cs4521as@ariel.unm.edu \ | they grow to thier full hieght, /\_________________________/ | then chop themselves down... \/ The Analog Daemon \ \___________________________________/\_________________________/