(Who does TI's horrible industrial design?) I've developed such a liking for the 115ES that I've been able to get over it not being RPN.
SOLAR POWERED RPN SCIENTIFIC CALCULATOR PRO
And, like all TI calculators produced over the past 20 years or so, the 30X Pro is god-awful ugly. That having been said, based on your description the 115ES would still be my calculator of choice, even ignoring the 30X Pro's 25 percent higher price. The 115ES wipes the slate clean when it shuts off, manually or automatically. The only thing that the W516 does that I wish the 115ES did is preserve the state of the machine at shutdown so that it all appears when turned on again. Both are available for about $17.50 in north Alabama. Nice review, especially the comparison to the Casio fx-115ES and the Sharp EL-W516.īased on my own personal comparison, the 115ES is an easier to use device than the W516. Message #5 Posted by Mike Morrow on, 10:37 p.m., I doubt any solar panel could be incorporated that by itself can power such a calculator during program execution. I also agree that a solar-power option for programmable calculators would be of questionable utility. The physics, electrical engineering, materials science, and mathematics that are incorporated into such a calculator are still an object of great fascination for me. There's just something appealing to a small micro-power consuming device capable of scientific calculations that can power itself.
Non-programmable scientific calculators (what few still remain) should without any question be dual solar/battery powered.
I love solar in scientific calculators.Most calculators now that use solar are dual powered. Message #4 Posted by Mike Morrow on, 1:20 a.m., In direct sunlight, though, I think it could do anything. In room lights, some things (possibly root finding, integration, and even statistics ) would cause the calculator to reset. The last time one of my dual powered calculators had its battery die, I tried some experiments to see what it could do with the solar cell alone. Most calculators now that use solar are dual powered, and I think that does help - the batteries seem to last an extremely long time. It might not be entirely rational I like the idea that if I was on a desert island, my calculator could last forever. In response to message #2 by Katie Wasserman Message #3 Posted by Crawl on, 11:21 p.m., I suppose that when running on solar power you could slow down the clock, but it would likely have to be really slow and what fun would that be? On a programmable calculator (like the 11C, 15C or 35s that you mention) you're absolutely going to need a battery anyway, so why bother with having a solar power in addition? I seriously doubt that a modern, high-speed programmable could run at a good speed on the tiny about of current you'd get form such a small solar cell array. This looks like a nice calculator, but I'm curious about the appeal of solar power.
Message #2 Posted by Katie Wasserman on, 10:26 p.m., Re: OT: TI 36X Pro and Wishes for a solar RPN calculator In the meantime, here is my review of TI's 36X Pro: However, a solar powered HP 15C or 35S would be sweet. I am still holding out hope for a solar-powered RPN calculator from HP, even if it is similar to the 11C. OT: TI 36X Pro and Wishes for a solar RPN calculator OT: TI 36X Pro and Wishes for a solar RPN calculator The Museum of HP Calculators