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Home > Archive > Electrical Engineering > March 2006 > Tech Support? - Help!
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Tech Support? - Help!
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| minski_wit 2006-03-31, 7:21 pm |
| Hello,
I am working on a project where i'm looking to deliver power from a
12vdc, approx 10A, battery to a mechnical relay which will switch when
i send a signal from my microcontroller.
The catch is that, as most linear actuators need positive and negative
voltage, so do mine..
I am thinking i may be able to accomplish this if i use two mechanical
relays but thats just a guess. I was thinking some kind of setup with
an inverse amplifier but that certainly does not not manage such
current.
If anyone has any suggestions I would greatly appreciate it
Thank You
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| spamTHISbrp@yahoo.com 2006-03-31, 7:21 pm |
| You need a double-pole double-throw switch configured for 'reversing'-
like here:
http://www.kpsec.freeuk.com/components/switch.htm
down the page about 1/2 way.
You could use a DPDT relay, or several smaller relays wired
appropriately. You just need to make sure it can never get into a
configuration that shorts the battery.
DPDT relay will be the safest route.
Dave
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"minski_wit" <minskii@wit.edu> wrote in message
news:1143843991.620492.161960@t31g2000cwb.googlegroups.com...
> Hello,
>
> I am working on a project where i'm looking to deliver power from a
> 12vdc, approx 10A, battery to a mechnical relay which will switch when
> i send a signal from my microcontroller.
>
> The catch is that, as most linear actuators need positive and negative
> voltage, so do mine..
>
> I am thinking i may be able to accomplish this if i use two mechanical
> relays but thats just a guess. I was thinking some kind of setup with
> an inverse amplifier but that certainly does not not manage such
> current.
>
> If anyone has any suggestions I would greatly appreciate it
>
>
>
> Thank You
GE makes an RR9 relay. Used for their low voltage lighting systems. It is
electrically driven in each way by voltage. Only problem is all of the
RR9's I have used are 24 volt. Aint cheap, but they do work for long
periods of time.
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