How do I transform some kind of voltage into 5v? Answered

I'm planning on building a circuit with an ic which needs 5 volts, and I don't want to use a computer as a powersource, what can I do?
Or can I use 4,5 volts for it.

Thanks,
BoK

Tags:voltage

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astroboy907

Best Answer 9 years ago

I do 328s all the time at 4.5v

Ive also tried 3v, it doesnt work on mine (probably I havn't changed fuses/bits/whatever)

5v is the "stable" configuration. If youre project relies an precise timing, its better to do it with a regulator :)

steveastrouk

Answer 9 years ago

Hmm, read the Atmel datasheet. Its rated from 1.8 to 5.5V, and works reliably. If your project needs precise timing, you need to use a crystal.

astroboy907

Answer 9 years ago

of course. *Duh. Forehead slap*

iceng

9 years ago

Transform suggests a 5volt wall wart..

A

steveastrouk

9 years ago

A 328 will work fine on 4.5 Volts. It will work from 1.8 V to 5.5V.

LDO ? Look it up.

Steve

frollard

Answer 9 years ago

there ya go, now did the author consider asking the voltage very politely if it would be lower?

Balls of Kevlar

9 years ago

I'm using an atmega328, and what is best 4.5 or 6 volts, what does LDO stand for? ;D

frollard

Answer 9 years ago

low drop out

Definitely look at the datasheet. A regular regulator has a 2 volt dropout so you really want 7 volts in to make stable 5. A LDO regulator will have as little as a quarter volt drop. meaning you can reasonably supply 5.5 volts for a stable supple.

You'd really want bare minimum 4x1.5v batteries to get 6v for stable operation on a 5v chip.

steveastrouk

9 years ago

Depends on the chip. It might work on 4.5 volts, otherwise, use 6V and a small LDO regulator

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How do I transform some kind of voltage into 5v? Answered

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