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Old 10-15-2013, 11:38 PM   #1
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Default Electronics gurus, how to convert 12v to 15v

I want to know if anyone thinks this is possible to set up some type of inverter/capacitor setup that would take 12ish volts and jump it up to 15 volts constantly at around 10 amps or so without dropping a bunch of cash on a standalone box like speedwaymotors sells. It would be wired for momentary application. Basically like this,



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Old 10-16-2013, 12:34 AM   #2
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link to speedway motors box? I found another for $150 maybe a friend can help me out with a schematic... What does it operate?
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Old 10-16-2013, 11:11 AM   #3
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DC-DC converter: NEA0161501B0C Murata Power Solutions | Mouser

not sure if works.
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Old 10-16-2013, 01:28 PM   #4
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How accurate does the 15V have to be? Most alternators have a 14.4 V setpoint.
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Old 10-16-2013, 08:56 PM   #5
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Without any real knowledge of your application I'll say that 1A can be done quick and cheap, but 10A requires more substantial electronics which costs. If you can buy something off the shelf for $100 or $150 that comes with a warranty then it probably makes sense to go that route. Certainly something could be put together for less, but it would take an investment of time and effort.
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Old 10-18-2013, 02:19 AM   #6
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What you want is called a boost converter. Finding one that can source 10 amps that's off the shelf and with any sort of guarantee won't come cheap.

You could give this a shot:
http://www.ebay.com/itm/Boost-DC-DC-...item4ac7d35fce

Last edited by Jeff_Ciesielski; 10-18-2013 at 02:29 AM. Reason: I cannot read.
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Old 10-18-2013, 10:55 AM   #7
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It would be easier to hack your alternator to charge at 15.5V and regulate it down to 14 for the rest of the car.
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Old 10-18-2013, 11:00 AM   #8
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No it wouldn't. He only needs 10A @ 15.5V, whereas the rest of the car may demand >50A.
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Old 10-18-2013, 11:01 AM   #9
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Quote:
Originally Posted by Jeff_Ciesielski View Post
What you want is called a boost converter. Finding one that can source 10 amps that's off the shelf and with any sort of guarantee won't come cheap.

You could give this a shot:
Boost DC DC Converter Power Supply Step Up Module 10V 60V to 12V 80V 600W 10A | eBay
Good find. You could use one of these for boosting fuel pump output, ferinstance.
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Old 10-18-2013, 11:09 AM   #10
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This isn't hard.

The device Y8s linked to will work so long as you can guarantee that "12v" never rises above 14v.

The device Jeff linked to will work so long as you EITHER can guarantee that "12v" will never rise above 15v, or you can tolerate excursions above 15v.


Otherwise, you need a buck / boost converter such as this: CHB150W-24S15 Cincon | Mouser
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Old 10-18-2013, 12:50 PM   #11
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Quote:
Originally Posted by Joe Perez View Post
This isn't hard.

The device Y8s linked to will work so long as you can guarantee that "12v" never rises above 14v.

The device Jeff linked to will work so long as you EITHER can guarantee that "12v" will never rise above 15v, or you can tolerate excursions above 15v.


Otherwise, you need a buck / boost converter such as this: CHB150W-24S15 Cincon | Mouser
the device i linked to has typos in the web data. it's only gonna supply 5V
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Old 10-20-2013, 12:08 PM   #12
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