Introduction: DIY Solar-powered Battery Charger From a Garden Light
What do you do when your solar-powered garden light gives up? The solar cell usually is OK. I decide to convert it to a 1,5 V batter charger. It works very well!
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8 years ago on Introduction
you need a diode for when the sun is not up to stop the battery discharging through the solar panel
Reply 8 years ago on Introduction
I also thought that I need a diode so I tested without it and it works fine.
Reply 7 years ago on Introduction
Wow, what an awareness!
The correct answer is: "It is not broken YET"!
You need to check up the maximum voltage or the solar cell, then you have to stabilize (probably stepping up or down) to the max. volt. of the battery including a diode.
Secondary Cell = 1.3V
Solar Cell: max. 2V
Diode = -0.7V
Battery > Solar Cell -> Boost Module
Battery < Solar Cell -> Buck Module
or any automatic module
would work fine!