So iv a home theater system im integrating the old and the new

My master control amp has a 12v trigger out

Im need to run 2 power amps for extra outputs so iv decided to use a a basic relay fed from the 12v trigger to feed a secondary 12v psu to trigger some ssr to turn on 2 power amps and some fans.

Do I need to add current resistor to the input of the ssr? Or should a i build a timing circuit to switch from the trigger signal over to the 12v supply im using for the rest of the circuit?

 

Do I need to add current resistor to the input of the ssr?

Got a link to the SSR? I also assume you have a DC SSR.

Ron

 

Got a link to the SSR? I also assume you have a DC SSR.

Ron

Yes sorry I should have mentioned that its a Chinese "fotek ssr 50 da" I dont think I need to over engineer it they will simply be switched on by the amplifiers 12v trigger out and thats will in turn turn on 2 power amps and a fan assembly. I just want to future proof the build as best as possible.

Thanks for the help

 

OK so here is what I am seeing:

Fotek Solid State Relay SSR-50DA.
Input Voltage. 4 – 32 VDC.
Output Voltage. 24 – 380 VAC.
Output Current. 50 A max.
Turn off voltage. < 3.5 VDC.

So a turn on (control) voltage is fine.
The switching voltage should be 24 to 380 VAC and you are switching AC correct?

Ron

 

If you are driving a 12 volt SSR with 12 volts that should be OK! Most SSR devices can be kept on all the time .
BUT DO NOT exceed the SSR current rating. with many amplifiers there is an inrush current when theyswitch on.
Is the trigger out that you are using DC?? or AC?? That could be an issue. BUT if it is working you are probably all set.

 

I just want to future proof the build as best as possible.

I can't help but think you're building in obsolescence instead. In my home theater, everything is connected over HDMI and clearly talks to the other components. Turning one device on or off turns all the others on or off. No relays, 12V triggers, none of that. My old AVR had a 12V trigger out but that's gone from the new one I got recently.

Just my 2¢. Ignore as you wish.

 

How much did that HDMI hub and all of the HDMI connection cables totally cost?? The TS schemes are the cost of relays that the TS probably has on hand.

 

How much did that HDMI hub and all of the HDMI connection cables totally cost?? The TS schemes are the cost of relays that the TS probably has on hand.

No hub, unless you consider the AVR as the hub. Good cables aren't cheap, but not much compared to the TV and AVR. Avoiding HDMI precludes you from using a lot of modern content, which will look for content protection.

 

Thanks for the answers!!

 

I can't help but think you're building in obsolescence instead. In my home theater, everything is connected over HDMI and clearly talks to the other components. Turning one device on or off turns all the others on or off. No relays, 12V triggers, none of that. My old AVR had a 12V trigger out but that's gone from the new one I got recently.

Just my 2¢. Ignore as you wish.

Consider that in order to receive any communication thru that HDMI link, the processor on the receiving end must be active, meaning that they are powered up! In most cases that means that the power supply electronics are powered and acyive, to provide that instant turn on that most folks love. So there certainly is a bit of added cost.
AND, the constant connection also is a constant path for those nasty power spikes that occasionally happen to arrive .