On 03/18/2018 08:06 PM, wrote:

[snip]

LEDs aren't different in one direction. Shine a light on them and
they'll make electricity. ;-)

I actually did this once, replacing a microphone on a tape recorder. It
was interesting to listen to the lights people think are on continuously.

--
Mark Lloyd
http://notstupid.us/

"By the year 2000 we will, I hope, raise our children to believe in
human potential, not God..." [Gloria Steinem, Saturday Review of
Education, March 1973]