I'm trying to work on a small project for on of my relative's. Bear with me please because I really new at this.
Basically I'm trying to copy to solar night lights that people have around their gardens or sidewalks. So far I've come up with using a 3V 45mA solar cell to power 2 3.8V 20mA LEDs. Because the main purpose is that this will light up at night I thought that I would use the cell to charge 3 3.2V 400mAh batteries during the day and then use the batteries to power the LEDs at night. Since the 3 batteries will be 9.6V total and the 2 LEDs will take 7.6V I believe that I'll need a 100Ω resistor in there as well.
My question is this: Is any of this even close to being correct? And if so will solar cell be able to power the batteries sufficiently and will the batteries be able to keep LEDs going through at least most of the night?
Thanks to anyone that can lend any advice.
Basically I'm trying to copy to solar night lights that people have around their gardens or sidewalks. So far I've come up with using a 3V 45mA solar cell to power 2 3.8V 20mA LEDs. Because the main purpose is that this will light up at night I thought that I would use the cell to charge 3 3.2V 400mAh batteries during the day and then use the batteries to power the LEDs at night. Since the 3 batteries will be 9.6V total and the 2 LEDs will take 7.6V I believe that I'll need a 100Ω resistor in there as well.
My question is this: Is any of this even close to being correct? And if so will solar cell be able to power the batteries sufficiently and will the batteries be able to keep LEDs going through at least most of the night?
Thanks to anyone that can lend any advice.