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8th September 2005, 06:35 PM
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#1 |
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diyAudio Member
Join Date: Oct 2003
Location: Denmark, Viborg
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How to make a solid state relay?
How can I make a solid state relay? Is there more to it than a big mosfet and an opto coupler?
Cheers Magura 
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Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com |
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8th September 2005, 06:43 PM
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#2 |
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diyAudio Member
Join Date: May 2005
Location: Michigan
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Additional parts would be required for...
- Overvoltage protection - Overcurrent protection - Overtemperature protection - ESD protection - Zero crossing switching (AC relays) - etc... If you don't need these features, then an opto, transistor and a few resitors would probably work fine. |
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8th September 2005, 06:49 PM
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#3 | |
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diyAudio Member
Join Date: Jul 2005
Location: 65N 25E
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Re: How to make a solid state relay?
Quote:
1mA or 100A? 1v or 1000V from big mosfet i could assume...something What do you want to do with your SSR? Just want to do it by yourself or is there some reason not to use standard products from companies like cp-clare or phoenix? And yes, thats about what is needed in real basic case. real-word working circuits may have plenty of other components also depending on application... |
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8th September 2005, 06:58 PM
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#4 |
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diyAudio Member
Join Date: Oct 2003
Location: Denmark, Viborg
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I need to switch 16VAC 20A. The SSR's I've seen so far will not work under 24V.
I also need to switch 60VDS 2A. This is not a problem to find an off the shelf part for though. Cheers Magura
__________________
Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com |
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8th September 2005, 07:02 PM
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#5 | |
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diyAudio Member
Join Date: Oct 2003
Location: Denmark, Viborg
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Re: Re: How to make a solid state relay?
Quote:
I would like to switch between windings of PSU trafos in class A amps and the small one would be for the same purpose in a pre amp. Cheers Magura
__________________
Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com |
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8th September 2005, 08:59 PM
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#6 |
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Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
Join Date: Jan 2002
Location: Perth Canada
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How about .....
A triac.
Mark
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Mark |
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8th September 2005, 09:06 PM
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#7 | |
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diyAudio Member
Join Date: Oct 2003
Location: Denmark, Viborg
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Re: How about .....
Quote:
Cheers Magura
__________________
Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com |
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8th September 2005, 09:11 PM
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#8 |
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Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
Join Date: Jan 2002
Location: Perth Canada
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Check out the link and see how he used it.
__________________
Mark |
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8th September 2005, 09:17 PM
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#9 |
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diyAudio Member
Join Date: Oct 2003
Location: Denmark, Viborg
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Hmm, almost too simple to be true.
Thanks a lot Mark. Magura
__________________
Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com |
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9th September 2005, 12:41 PM
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#10 |
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Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
Join Date: Jan 2002
Location: Perth Canada
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I'm here for you
Happy to help.
You me and the eskimos go way back! By the way nice job on those rotary switches. Mark
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Mark |
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