Solar-powered calculators

[Dave Britten]

(04-29-2020 01:03 PM)twdeckard Wrote:  Has anyone ever ginned up a solar powered HP41? I know there isn’t enough real estate on the calculator so it would mean dangling a solar cell off of it? However given it only draws a few hundredths of a milliamp when off and 10mA when running would make a fun project? Wasn’t there a power from USB module hack?

I was kind of wondering if anybody had attempted this with the Voyagers, since they apparently draw only 70 micro Amps when on and idle:

https://www.hpmuseum.org/forum/thread-14886.html

Could make a little solar panel assembly with the contacts on a small barrel that's sized to match 3 LR44s.