low budget trial to adapt existing trickle charger.
Purpose: USB charger direct from solar panel. (I know, battery inbetween is plenty good. but USB gadgets have internal batteries and charge logic built in, so usurp them!)
My solar puts out 1.5Watts 15V 100ma hope the numbers are right.
I looked, I found. DC voltage regulator circuits. Using LM317T and resistors to regulate the Volts to 5.3V. No problem there. So the DC regulator cuts the volts from 17.5 max (variable) to 5.3V (steady).
I know, many have misunderstood the relationship between Volts/Amps/Watts including me. I am there to a degree. So the resistor resists the flow and dissipates some as heat. Seems a waste of all those volts since the panel generates them anyway - that is probably a stupid thing to say but wait a minute!
My question is this. The panel puts out 100ma. at 15V. right. I reduced Volts to 5.3V. Can I use the extra available (i might add - freely available) Volts to generate more Amps ? say i wanted 300ma at 5.3V - is there a circuit out there that could use the unused volts to pump up the amps ? Yes, i know. again. silly question. but I have no electronics background - maybe one of yous know more and I missed something ?
Thanks.
call me a numbnut if you will, but your answers could save me months of searching. Thus making me jack of many trades but king of none!
Purpose: USB charger direct from solar panel. (I know, battery inbetween is plenty good. but USB gadgets have internal batteries and charge logic built in, so usurp them!)
My solar puts out 1.5Watts 15V 100ma hope the numbers are right.
I looked, I found. DC voltage regulator circuits. Using LM317T and resistors to regulate the Volts to 5.3V. No problem there. So the DC regulator cuts the volts from 17.5 max (variable) to 5.3V (steady).
I know, many have misunderstood the relationship between Volts/Amps/Watts including me. I am there to a degree. So the resistor resists the flow and dissipates some as heat. Seems a waste of all those volts since the panel generates them anyway - that is probably a stupid thing to say but wait a minute!
My question is this. The panel puts out 100ma. at 15V. right. I reduced Volts to 5.3V. Can I use the extra available (i might add - freely available) Volts to generate more Amps ? say i wanted 300ma at 5.3V - is there a circuit out there that could use the unused volts to pump up the amps ? Yes, i know. again. silly question. but I have no electronics background - maybe one of yous know more and I missed something ?
Thanks.
call me a numbnut if you will, but your answers could save me months of searching. Thus making me jack of many trades but king of none!