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How do I raise 3.7 volts to about 5-6 volts? Answered

I have a battery that has an output of 3.7 volts, but that's too little for the project I'm doing. I need about 5-6 volts that I can work with.
I'm driving 6 arrays of 2 leds, powered by an IC that I've programmed (for what its worth).

I was wondering if there was an amplifier circuit, a step up circuit, a transistor, dc-dc converter, a surface mount Genie I can use to boost the power of my battery.

Community, I call for your aid!

4 Replies

.Unknown. (author)2011-06-10

This circuit worked surprisingly well for me:
Most of the parts can be found in old appliances, and the Zener diode can be substituted for 2 white LEDs (Cathode to ground though).
Puts out ~500ma.

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Jack A Lopez (author)2011-06-08

There exist DC-to-DC converters intended for the purpose of charging one's mobile phone from a pair of AA batteries. The output voltage from this device is a a regulated 5 VDC, at I forget how much current, a few hundred mA I think, similar to the spec for a USB port, often with the same shape. The input voltage is whatever 2 AA batteries in series can supply, which would be something in the range from 2 to 3 volts.

A while back, ladyada wrote the seminal "Minty Boost" 'ible, which is basically the same thing, a regulated 5 VDC supply that runs from 2 AA batteries.

But it's a lot of work to build something like that when you can just go out and buy it on the street for like 5 USD.  I claim to have seen such things in in-real-life, brick-and-mortar stores, but the link below is, of course, to online retailers:

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iceng (author)Jack A Lopez2011-06-08

Ladyada and I both selected the MAX756.... !

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iceng (author)2011-06-07

This Maxim should do what you want.   A

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