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a 5 V mobile phone charger from a 9V battery using a voltage divider circuit. Can...
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<blockquote data-quote="billrussell42" data-source="post: 2539684" data-attributes="member: 117279"><p>Voltage dividers don't work very well at high currents. What you want is a 3 terminal voltage regulator such as a LM7805</p><p></p><p>You would be better off with 3 AA or C cells, which will give you about 4.6 volts, which will probably run most chargers. That way you don't waste 4 volts. </p><p></p><p>.</p></blockquote><p></p>
[QUOTE="billrussell42, post: 2539684, member: 117279"] Voltage dividers don't work very well at high currents. What you want is a 3 terminal voltage regulator such as a LM7805 You would be better off with 3 AA or C cells, which will give you about 4.6 volts, which will probably run most chargers. That way you don't waste 4 volts. . [/QUOTE]
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