I'm in the process of building a solar powered remote controlled airplane. My general idea was that I have 5V from the solar panels powering the receiver, the ESC, two servos and a brushless motor. If the voltage of the solar cells falls beneeth 3.7V, my 1S-LiPo-battery takes over.
For this I found the «Mini Solar/Lipo Charger v1.0» from Elecrow which apparently exactly does the trick of being a switch and at the same time charging the LiPo with the power from the solar cell input.
So before I start to tab all solar panels I wanted to do a test run and see if all my chosen components get enough power with the 3.7V-LiPo.
After I hooked everything together and as a last step plugged in the LiPo at the LiPo-socket on the Elecrow-Board, the board smoked :-(
I don't know exactly where to start to find out what I'm doing wrong.
I attached a picture of my setup (without the solar cells).
Thank you very much for you help!