How would I convert 6.6 Volt DC to 5 volt DC?

I’m trying to make one of those popular homemade solar chargers for a cell phone and know very little about electronics. Is there an easy way to convert the 6.6 Volt output of my solar cells to the 5 volt used by my phone charger? Also, does it matter? I know I can do damage by upping the amps too much, but does 1.6 Volt matter? -Thx

You can make a simple series voltage regulator. Any electronics book would carry the circuit diagram.The components are:
npn transistor BC547 -1
Zener diode 5.6V,1W -1
:Resistor 0.25W, 100 ohm -1
I don’t have the means to draw the circuit diagram here. The solar cell of 6.6V is connected between the collector of transistor and common point. Resistor is connected between the collector and the base. The diode zener is connected between the base and the common point. The battery to be charged is connected between the emitter and the common point.
Respect the polarity of transistor, diode zener, solar cell and the battery.

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This entry was posted on Tuesday, June 22nd, 2010 at 5:28 am and is filed under cell phone car chargers. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.