Tech Support? - Help! - PolyTech Forum

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- minski_wit
  
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posted
18 years ago

Fri, Mar 31, 2006 10:26 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
  
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posted
18 years ago

Fri, Mar 31, 2006 10:44 PM

You need a double-pole double-throw switch configured for 'reversing'- like here:

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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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- SQLit
  
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posted
18 years ago

Sat, Apr 1, 2006 1:03 AM

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.