Throwie/Blinky using LED for Solarpower or using Radiowaves
I was wondering if its possible to make a "battery-less" throwie or blinky.
I know there have been some solar throwies arround, but when looking through a message-board I found two circuits that use radiowaves or photovoltaik properties of a LED.
The only difference is that the "bettery-less" throwie would have to collect power untill its dark, and then feed from it.
Since I am not really into all the electronics yet, I do now know how well capacitors will keep their load, and if a aditional day/night switch detector will consume much power.
The LED-drives-itself circuit:
LED drives itself from Mikrocontroller.net
(I've read in the forums that preparing the LED with sandpaper so its diffus will make it less angle dependant to charge?)
The Radiowave-Blinker circuit:
from the german electroniwerkstatt-Forum (Click and look at end of toppic)
A simple day-charge / night-operate circuit (such as a garden solar night light)
[http://solar night LED https://www.instructables.com/id/EPYWPCC3M0EVYE00UZ/ CLICK]
Has anyone build something like that?