Shop URL http://www.dx.com/p/1-8w-polysilicon-solar-panel-black-394260
Why this panel ?
its a Polysilicon Solar Panel.
Easy to connect
This epoxy coated for toughness. On the back of the panel are two (thin) solderable terminals, with marked polarity. (While you can solder directly to the terminals, be sure to stress-relieve the connections, e.g., with a blob of epoxy over your wires.) .This guy throw a nice little 90 mA, to 120mA . That is tiny power to be harvested with a super cap .
Where to Use 'The circuit '
well there are couple of use cases viz smaller controllers that need 'small power'
Example : water level sensor
road safety blinker
plant water reminders
even a battery saver calling bell
We will come with the viable circuit to be used in next post ...
After GST rates were fixed importing is easy .
A typical experimenter board can be easily made with digi spark https://potentiallabs.com/cart/digispark-attiny-85-online-india-hyderabad