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How do I power a 9v LED array with a Miller Solar Engine? Answered

Hi there!

I'm a complete electronics newbie. I'd like to know if it is possible to power a 9v LED Array by way of a Miller Solar Engine that uses a 6.7v Solar Cell. I'm attempting a similar project to this...


With the main difference being that I'm going to have two little robots, one holding the solar cell and one holding an LED array! The idea is that the solar cell would charge a capacitor that would then occasionally power the LED array. I dont even know if this is possible, i'd appreciate your help!



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11 years ago

If you wire the LEDs in parallel, they will draw more current (ie stay lit for less time), but require less voltage.

However, Miller solar engines work best in sunlight - that will make the LEDs less visible.

Instead, I would use a pummer-style circuit that will sit and soak up energy in daylight, then dump it through the LEDs when it gets dark, so they show up better.


Answer 11 years ago

Thank you for your answer! I think you're right, something along the lines of a pummer would be much more appropriate.

I wasn't really clear with my question though. I should of explained that I bought this kit >


This is what i need to power and the instructions say it requires between 8v - 15v power supply. So i wanted to power it using a solar cell. I think all I need for this would be a 6.7v solar cell from this place (http://www.active-robots.com/products/components/solar-cells.shtml), a schottky diode, a rechargeable 9v battery, a light dependant resistor and a voltage regulator but having no knowledge of electronics whatsoever, i wouldn't even know where to begin with wiring such a circuit properly!