For the voltage measurement circuit i found as well a tutorial at openenergymonitor.
Solar panel arduino enough.
Before wiring the solar panel to the arduino we should do a test run using an led first.
For the solar panels i chose a 330 ohm burden which allows a maximum of 10a which is more than enough for a 1kw system.
In this system solar panel will move in the direction of sun from sun rise to sun set.
In other word s you ll want four solar panels presumably connected in parallel don t quote me on this d in order to power your arduino through thick or thin.
But ordinary cheap ones are not efficient enough to use with maximum power from solar panels.
Project tutorial by abhi verma.
It depends on what mode the arduino is in and what peripherals you have running.
If you decide to use a 5v arduino simply add a boost converter after the 3 3v supply amazon model xl6009 dc to dc converter.
For calculation of the burden resistors please check the link to the openenergymonitor building block.
Hence you need to increase the surface area of your solar array by 3 22 times.
Arduino pro mini with no load draws less than 5ma.
There are lots of forums that discuss how to put the arduino in sleep mode so that it consumes 5ma or less.
There is also a 5 volt arduino pro mini available that runs a 16 mhz clock.
We used a green led with a forward voltage of 2 0v meaning that it should light up as long as our solar panel can output at least 2 0v.
Our indoor lighting test earlier gave a reading of around 2 5v so connecting the two made the led light up.
But for this exercise we will use the 3 3 v pro mini.