Post Reply 
Question to HP-35 owners
02-07-2015, 08:52 PM
Post: #10
RE: Question to HP-35 owners
(02-03-2015 01:08 AM)BarryMead Wrote:  I still have my original HP-35. I recently bought a new NiMH battery and a USB charging cable for it so
it even works on battery power again.

Alright, then, you might be the right person to come up with the final answer to the question this thread is all about: which decimal points are lit when the battery charge drops below a certain level? Do they just invert, as WalterB suggests? Or do they show up in the way the HP-35 manual states (see attachment)?

One more question: if you plug in the power adapter, does the battery warning disappear immediately, or only when the battery charge crosses the trigger level again?

My guess is that HP chose a simple hardware solution: XORing the decimal point signal with the output of the voltage detector. No software involved at all.

I'd love to make my HP-35 simulator behave like the real thing.


Attached File(s) Thumbnail(s)
   
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
Question to HP-35 owners - Willy R. Kunz - 01-31-2015, 01:33 PM
RE: Question to HP-35 owners - walter b - 01-31-2015, 02:12 PM
RE: Question to HP-35 owners - BarryMead - 02-03-2015, 01:08 AM
RE: Question to HP-35 owners - Willy R. Kunz - 02-07-2015 08:52 PM
RE: Question to HP-35 owners - PANAMATIK - 02-07-2015, 09:47 PM
RE: Question to HP-35 owners - PANAMATIK - 02-08-2015, 06:10 PM
RE: Question to HP-35 owners - Dieter - 02-08-2015, 06:46 PM
RE: Question to HP-35 owners - PANAMATIK - 02-09-2015, 02:36 AM
RE: Question to HP-35 owners - PANAMATIK - 02-09-2015, 10:01 AM
RE: Question to HP-35 owners - walter b - 02-09-2015, 10:27 AM
RE: Question to HP-35 owners - walter b - 02-09-2015, 12:14 PM



User(s) browsing this thread: 2 Guest(s)