*Power supply question*
caesar
Posts: 10
Hello,
·· Because·it·has·more than the 12vdc 2amps minimum needed for my drill motor. I was wondering...
Are there any drawbacks with using an ATX computer power supply to power both my drill motor and a Basic Stamp?
I believe a 10-15 ohm, 1 watt resister should reduce the 12vdc to 9vdc 300ma for the Stamp. And since the power supply was designed for a PC, I think it would already be filtered(clean).
Any thoughts?
Thanks!·
·· Because·it·has·more than the 12vdc 2amps minimum needed for my drill motor. I was wondering...
Are there any drawbacks with using an ATX computer power supply to power both my drill motor and a Basic Stamp?
I believe a 10-15 ohm, 1 watt resister should reduce the 12vdc to 9vdc 300ma for the Stamp. And since the power supply was designed for a PC, I think it would already be filtered(clean).
Any thoughts?
Thanks!·
Comments
Definitely would be fusing·everything. My ATX ps is rated for 12vdc @ 12amps & 5vdc &·7amps WOW! definitely overkill.
But it's a free ATX power supply. I was hoping to power the whole project with it.
What's the most inexpensive way to power my 2-3 amp drill motor? Should I just buy one of those RadioShack 12vdc regulated power supplies?
Thanks!
Post Edited (caesar) : 8/23/2008 6:04:37 AM GMT
Should I just buy one of those Radio Shack 12vdc regulated power supplies?
Once upon a time I thought this was a good ·BUT it not to use a regulated power supplies you are asking for trouble I have fryed the regulators
in these type before you cause they to over heat
You can do this on any transformer ONE Amp and above
·Your best bet is to take a transformer that is 18 volts an with a rectifier and cap and remove enough of the secondary winding on
that transformer so that when your drill motor is running it is 12 volts yes this is a little work but it works
You can try a 12 transformer first and see if this will have enough voltage
This is my 2 cents worth on this
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··Thanks for any··that you may have and all of your time finding them
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Sam
Post Edited (sam_sam_sam) : 8/24/2008 1:36:51 AM GMT
I have used converted PSUs for years. BE VERY AWARE of the LETHAL voltages within the case, and if not comfortable with the
changes then ASK, GOOGLE, RESEARCH and be sure of what you do. I would not recommend running motors from a PSU. Just my two cents worth. John
Maybe I'm missing something...·· But I don't seem·to need·a resistance type load to·enable the power supply.
There's just 2 pins on the·main connector that need to be·jumped. Then the·power supply comes fully alive.
It must not be a "load sensing" supply.
I'm still going to persue a different power source, but I thought it seemed odd that everyone mentioned having some type of load to enable the power supply.
Thanks!
Post Edited (caesar) : 8/26/2008 12:06:59 AM GMT