I need help building a 1.3V solar charger from garden light cells?
I need some help with building a solar charger...I don´t know much about electronics, maybe one of you has the patience to answer a few questions?
The device I want to charge has a label that says 1.3V=2W (there is 1 rechargeable Nickel-Cadmium battery inside), the wall charger is labeled 1.3V=1500 mA...
I have 2 solar cells from garden lights, they both were used to charge two 1.2V batteries with 600 mAh (in series). That´s all I know about them, I have no way of measuring the output...
1. How many Volts (at least) does it take to charge that device?
2. How many Volts can the battery take without getting damaged?
3. How many Volts do I usually get from those garden light cells? If they charge 2 batteries (1.2V) in series it should be 2.4V, right?
4. If 2.4 Volts is too much for the device, how do I limit it?
I would like to build the charger without buying a multimeter and the parts will be salvaged from other stuff...I hope...
I know those are a lot of noob questions but I would really appreciate your help!