HP Forum Archive 03

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AC POLARITY HP95-LX Message #1 Posted by Erwin on 12 June 2000, 10:40 a.m. Hello group, I have found a 9 V adaptor that i want to use for my HP95-LX. The specifications are : OUTPUT : 9.0 Volt , 500mA , 4.5VA (4.5 Watt) The polarity of the adaptor is: innercore : negative ( --) outside : positive ( + ) Can i use this adaptor ? Especialy regarding to the polarity of the adaptor and the HP95-LX offwitch it's polarity is unknown to me. Thank's for any help, Erwin

Re: AC POLARITY HP95-LX Message #2 Posted by gilpetri on 13 June 2000, 12:11 a.m., in response to message #1 by Erwin Erwin, You might want to check these 2 posts here: 1- http://www.sp.uconn.edu/~mchem1/hypermail/april.mail/0230.html 2- http://www.advanix.net/~smr/palmtop/95lxfaq.htm#Q13 Sorry, but it's the only reference I could find... Maybe another board member might help us on this issue? Gil Petri.

Re: AC POLARITY HP95-LX Message #3 Posted by Bill Duncan on 13 June 2000, 2:39 p.m., in response to message #1 by Erwin AC doesn't have polarity, although in some cases (like the mains) one side is "Hot" with reference to ground. According to my hp wall-wart for my hp-95lx, your solution might be a bit underpowered, and it seems to be DC. The specs on mine are 9VAC, 13.5 VA. Now your DC adapter "might" work, if the 95 does full-wave rectification. I wouldn't suggest it however. And regardless, unplug it when not in use. For some reason it seems to drain the batteries faster, perhaps with some leakage current. But I haven't been able to verify. Your mileage may vary.

Re: AC POLARITY HP95-LX Message #4 Posted by Erwin on 14 June 2000, 2:51 a.m., in response to message #1 by Erwin Hello group, I asked this question to someone who also has a HP95-LX, and i also asked him where i can find software and more information on the HP95-LX. I thought that i better share his anwser with this group. BTW: I'm still looking for the program 'BUDDY95' . Erwin, check out ftp://sunsite.cnlab-switch.ch/mirror/hp95lx/ For serial transfer to/from your PC you can use ckermit (if you use Linux) or Hyperterminal (WIN9x). Also your AC adapter should work: the HP95 needs 9-13V AC (yes, AC; there is a full-wave rectifier in the HP95), but you can also feed DC into the unit. ALso check the FAQ on the abovementioned site... Hope that helps.

Re: BUDDY for the HP95-LX Message #5 Posted by Kevin FitzGerrell on 27 July 2000, 4:17 p.m., in response to message #4 by Erwin You can find Buddy for the 95lx at: http://www.buddy.com/index1.html Hope that helps!

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