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Class D Switching Power Amplifiers and Power D/A conversion

DIY 12v trigger
DIY 12v trigger
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Old 14th September 2011, 07:15 AM   #1
hbech is offline hbech  Denmark
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Default DIY 12v trigger


i don't know if this i the rigth place for this post.

i have to Vincent SP-996 without 12v trigger, is it possible to make i DIY 12v trigger?

i think i just can solder it parallel over the power switch does.

Her is i another post about my problem.
Auto Power-on Amp withput 12V trigger - AVS Forum
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Old 14th September 2011, 07:26 AM   #2
hbech is offline hbech  Denmark
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But this is nok a car audio amp?
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Old 14th September 2011, 08:33 AM   #3
dragonxwas is offline dragonxwas  India
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get a 12v 150ohm relay connect it to the remote out of your car stereo,

and connect the switching contacts to the powersupply of your amp, done..
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Old 14th September 2011, 09:31 AM   #4
hbech is offline hbech  Denmark
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Byt it's not a car audio amp
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Old 14th September 2011, 01:48 PM   #5
Saturnus is offline Saturnus  Denmark
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Then we don't know what your problem is. Describe it.
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Old 16th September 2011, 01:20 AM   #6
Zaaphod is offline Zaaphod  United States
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it doesn't matter what kind of amp it is.... get a relay with a 12v coil and contacts rated for whatever your power requirements are. If you have a line powered amp, just get a relay with ac contacts rated for whatever your line voltage is and a minimum of the rated current of the amp. connect the contacts across the power switch, and your 12v signal will switch it on.
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Old 19th September 2011, 02:51 PM   #7
dangus is offline dangus  Canada
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Why not contact Vincent and see if they can provide a module to retrofit your amp. Or a service manual or schematic that shows what is different with your version.

Otherwise, a small relay may be all you need; it sounds like the power switch is momentary contact (like the power switch on an ATX computer) and only switches a small current. Perhaps if you look inside, you'll see a place on a circuit board to add a relay or maybe an optocoupler and associated components.
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Old 20th September 2011, 11:31 PM   #8
CharlieLaub is offline CharlieLaub  United States
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DIY 12v trigger
If what you are after is something that will turn on other equipment when you turn on your preamp, you can do this:

Purchase a relay that has a coil rated for your country's AC voltage. Here in the states it is 120VAC. The relay should be rated to switch 10A of current at 120VAC/240VAC. You will need to connect the coil up in parallel to the AC power switch for the preamp (connect it after the preamp's switch), and run a wire out of the preamp to the relay. Put the relay inside an insulated box. Add a power cord to the box that will supply power to the relay contacts. Also add a receptacle to the box, that you can plug other equipment in to. Connect the relay contacts in between the power cord and a receptacle. The relay can be SPST type, as along as you can identify the "hot" lead of your AC power, otherwise use a DPST or DPDT relay and switch both "hot" and "neutral" leads.

This is not a "12V trigger" like you mentioned in your post. That refers to something that uses a 12V DC signal to turn on a relay outside the equipment.

I just created a remote switched AC outlet in this way. My preamp had a 5VDC trigger output connection on it already, so I used a solid state relay with a 3-30V DC coil. Now I can turn on my other stuff when I switch on the preamp. Nice!

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