12 V car voltage stabiliser

[pereczes]

Hi, was looking for different 12V car voltage stabilizers, DIY circutry etc. I found this cheap ready to use one from ebay/china wth a so called XL6009

I need something like that for input from a car battery and output for a picopsu for a car computer.

anybody any experience? well... ordered 2 pieces, will test it and see.

http://www.ebay.com/sch/i.html?_odkw=XL6009&LH_BIN=1&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=XL6009&_sacat=0

[Simon]

no experience, basically you want a buck/boost  converter. I'm going to guess the chip they are based on is one of those and in fact if you read the data sheet you will probably find that it's example circuit is the same as the circuit you are buying.

[gxti]

A boost converter like the ones you linked is only going to be able to increase the voltage, not decrease it. Your car is going to be putting out 14 or more volts most of the time as that is the charge voltage for the battery. The regulator you bought will not decrease that to 12V. Buck-boost or SEPIC is what you want. Or if you're cheap you can get a step-down (buck) module, set your boost module to put out 20V, and feed that into the step-down module to get the 12V you need :-)

You probably already bought the picopsu, but they do have an automotive version that is designed for this exact use.

[Richard Crowley]

Yes, as @gxti says, you are in that akward region where your picoPSU wants "regulated 12V", but your vehicle supply could range from 10V to 16V (at extremes).  So you need something specifically designed to handle the "hostile" vehicle power environment. Been there, done that, not worth "hacking it" when the proper solution is available.

[Richard Crowley]

Without knowing what kind of battery you are asking about, nobody can help you.
Different battery chemistries require different charging regimes.

What does "12V DC to 24V battery charger" mean?
Does that mean you want to charge different batteries that range from 12V to 24V?
Does that mean that you want to charge 24V batteries from 12VDC power source?