mickey2108
New Member
please help me...
i want to build a solar charger for handphone..
my problem is i dant know how to build it, and what component i must use..
now, i have a solar panel, 4v... but the batery is only 3.7v..
is that i must reduce the voltage?
i want to build a solar charger for handphone..
my problem is i dant know how to build it, and what component i must use..
now, i have a solar panel, 4v... but the batery is only 3.7v..
is that i must reduce the voltage?