On Mon, 19 Mar 2018 22:21:15 -0000, "James Wilkinson Sword"
wrote:

On Mon, 19 Mar 2018 15:33:28 -0000, Mark Lloyd wrote:

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.

What?

No, watt!