robot power
Moderators: snarkout, Patrick, dann
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davijordan
robot power
Anyone just hooked up batteries to an at style motherboard? I am looking for some circuits/schematics to power old at style motherboards to make a kind of portable. computer for a special project. The simpler the circuit is the better. If someone could point me to a site or other suggestion My daughter and I would really appreciate it.
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davijordan
That sounds like an excellant sugeestion and I really apprecuate it. I really need to be bale to add more cards and ports as needed thiough. I had thought about using an inverter since they are so cheap now.; but I want to run fanless or almost fanless. There are some commercial ps's that will do the job, but I did not want to invest that much moiney yet.
OK ... I see where you're going. What kind of motherboard is it? Older AT type have +/- 12 and +/- 5 ..... you could do that with TWO 12V batteries and two 6 volt batteries ... plus a diode or 5V regulator. ATX gets harder because then you need +/- 3.3V.
For ATX you might even be able to get away with 4 6V batteries .... onr pair for the + voltages one for the -. Two batteries in series would be 12 V ... and a "tap" between the two would be 6 Plus a diode to take you own to 5. (I need to think about that one a bit, sounds too easy
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I'd frown on the inverter idea ... sure it's easy .. plug and play ... but first you loose energy in the inverter ... then more energy in the PS ... and in robitics it's all about saving energy.
For ATX you might even be able to get away with 4 6V batteries .... onr pair for the + voltages one for the -. Two batteries in series would be 12 V ... and a "tap" between the two would be 6 Plus a diode to take you own to 5. (I need to think about that one a bit, sounds too easy
)I'd frown on the inverter idea ... sure it's easy .. plug and play ... but first you loose energy in the inverter ... then more energy in the PS ... and in robitics it's all about saving energy.
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davijordan
yahoo
I will mostly be using "at" boards with p1's. I have a boatload of them. Maybe not that many. I finally did find a couple of schematics that will do great. Thanx to several chip makers, we also have some donated parts for the circuits. Thanx to y'all for all the additional hints.
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davijordan
Re: yahoo
update:davijordan wrote:I will mostly be using "at" boards with p1's. I have a boatload of them. Maybe not that many. I finally did find a couple of schematics that will do great. Thanx to several chip makers, we also have some donated parts for the circuits. Thanx to y'all for all the additional hints.
For safety reasons we decided to go with a commercial dc-dc power for motherboards. You can get them for a decent price on ebay.
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davijordan