| Author |
Message |
Wim Godden
Guest
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 Posted:
Tue Nov 29, 2005 11:32 pm Post subject:
Batteries for PC/104 |
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Hi,
We have a small PC/104 device that performs some input logging. The
problem is we don't have any UPS system attached to it.
Does anyone know of any inexpensive (around $100) UPS systems for PC/104
? We only need enough power to perform a proper shutdown.
Many thanks,
Wim |
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Paul E. Bennett
Guest
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| Posted:
Wed Nov 30, 2005 1:15 am Post subject:
Re: Batteries for PC/104 |
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Wim Godden wrote:
| Quote: | Hi,
We have a small PC/104 device that performs some input logging. The
problem is we don't have any UPS system attached to it.
Does anyone know of any inexpensive (around $100) UPS systems for PC/104
? We only need enough power to perform a proper shutdown.
Many thanks,
Wim
|
Does your PC104 card have any power supply on it at all? If not you should
perhaps consider making your own UPS system. A DC-DC converter (or two)
delivering the PSU voltages the PC104 card requires, a battery pack that
has enough capacity to keep your system going for as long as you need it to
and a battery float charger. You need to ensure that, when the mains supply
fails, the charger is not responsible for any of the discharge.
--
********************************************************************
Paul E. Bennett ....................<email://peb@amleth.demon.co.uk>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-811095
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
******************************************************************** |
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Wim Godden
Guest
|
| Posted:
Wed Nov 30, 2005 1:15 am Post subject:
Re: Batteries for PC/104 |
|
|
"Paul E. Bennett" wrote:
| Quote: | We have a small PC/104 device that performs some input logging. The
problem is we don't have any UPS system attached to it.
Does anyone know of any inexpensive (around $100) UPS systems for PC/104
? We only need enough power to perform a proper shutdown.
Does your PC104 card have any power supply on it at all? If not you should
perhaps consider making your own UPS system. A DC-DC converter (or two)
delivering the PSU voltages the PC104 card requires, a battery pack that
has enough capacity to keep your system going for as long as you need it to
and a battery float charger. You need to ensure that, when the mains supply
fails, the charger is not responsible for any of the discharge.
|
I'm using a standard 230VAC-to-5VDC power supply that I hook up to the PC104
CPU board.
Basically, what you're suggesting is putting a standard battery (for example a
12V) in between and thus using a 230VAC-to-5VDC, then the battery, then a
12VDC-to-5VDC converter ?
Wim |
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Paul E. Bennett
Guest
|
| Posted:
Wed Nov 30, 2005 8:38 am Post subject:
Re: Batteries for PC/104 |
|
|
Wim Godden wrote:
| Quote: | I'm using a standard 230VAC-to-5VDC power supply that I hook up to the
PC104 CPU board.
Basically, what you're suggesting is putting a standard battery (for
example a 12V) in between and thus using a 230VAC-to-5VDC, then the
battery, then a 12VDC-to-5VDC converter ?
|
Almost right. Use a 230V to 12V PSU/Charger (to float a 12V battery) then
the 12V DC to 5V DC converter which will power your board. I know it seems
a bit strange but there is a huge loss of efficiency using a UPS system
that down-converts the 230V to a DC battery voltage then convert the DC
battery voltage to 230V AC. Your average laptop does things the way I
suggest. Yes, you will need to pay a little more attention to the
PSU/Charger item so that the battery is properly looked after. The DC DC
converters for after the battery are fairly common place these days.
--
********************************************************************
Paul E. Bennett ....................<email://peb@amleth.demon.co.uk>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-811095
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
******************************************************************** |
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