On 11/10/2019 12:56 PM, Jeff Liebermann wrote:
On Sat, 9 Nov 2019 15:08:15 -0500, Frank Krygowski
wrote:

You electrical guys ought to get busy on sending power without wires. I
mean, come on, didn't Tesla talk about that over 100 years ago?
...

(And don't brag about charging a cell phone with a little pad. Even the
Dukes of Hazzard could fly a car way farther than that!)

Inverse square law. Double the distance and you deliver only half the
power. What works in the near field (very close), fails in the far
field (far away). The RF power levels needed to make a cell phone
charger work at a distance is about the same as what it would take to
barbeque the user.

So, if properly calibrated, a cure for cold weather bicycling? Sign me up!

--
- Frank Krygowski