12V Trigger-driven Power Strips? - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 49 Old 12-31-2017, 11:25 PM
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Quote:
Originally Posted by DonH50 View Post
Good point. I typically use a Schottky diode or two (two to clamp both positive and negative excursions, Schottky to clamp before a Si-based junction can get biased on) plus a capacitor at times across the coil, and a small capacitor across the contacts.

The relay I first looked at drew 30 mA coil current; my AVR's trigger output is spec'd at 100 mA. Higher-power relays, that is higher current handling, generally perform better but have higher coil current to deal with their larger contacts. The nicer relays I was thinking about required 75 to 150 mA coil current so I would've needed a simple driver circuit (e.g. a small power MOSFET and handful of bias/suppression parts, including those for the relay -- at least it would have eliminated the d.c. draw issue).

Ultimately, I decided to try the X10 controller and subvert the problem. Hopefully!

Thanks for the link -- always adding to my parts places.
Old post I know but I'm sure @DonH50 is still around. There's still a curious lack of off the shelf products on the market for what seems like a relatively common need?
Don (or anyone else) I've got one of these trigger strips
https://www.adafruit.com/product/2935
coming to fire up my power amps from the 12 trigger of my Marantz AV7701. Do you think I should still use the diode or a cap of some type across the trigger input as was discussed here?
TIA
Sal

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post #32 of 49 Old 01-01-2018, 09:22 AM - Thread Starter
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Yah, still around, though rarely come to this sub-forum.

The spec sheet does not provide much in the way of real specs, like the input load, but given the description and application I think you'll be fine. The diode clamps and other circuitry is to protect a low-power trigger source from the voltage and current kickback of a relay. I was also concerned because some trigger outputs have lower output current (50 mA max on my Denon, I think) so a high-power relay with a high-current coil direct-attached would be a problem. The module you ordered is meant to be driven by microcontrollers and such and states the input is buffered before the high-power relay. Should be good to go.

HTH - Don

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post #33 of 49 Old 01-02-2018, 05:32 PM
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Quote:
Originally Posted by DonH50 View Post
buffered before the high-power relay. Should be good to go.

HTH - Don
Thanks for the feedback Don, I really appreciate you input.
See ya round the net.

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post #34 of 49 Old 01-05-2018, 03:28 PM
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Just thought I'd update with the outcome.
The IoT power strip worked perfectly for powering up my three Adcom power amps off the Marantz AV7701 12v trigger jack. Will work a hoot for sooo many different DIY projects for a lousy $25. Can't go wrong.
Review

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post #35 of 49 Old 09-02-2018, 01:04 PM
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Quote:
Originally Posted by brad1138 View Post
This is a great answer to this thread, quality and inexpensive.

http://www.digital-loggers.com/iot.html

I realize this is an old thread. But I recently got one of these off Amazon and it works great. Can't understand why this is such an issue to this day. Anyhow, any newer options available? Would be nice to see a consolidated list.
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post #36 of 49 Old 09-03-2018, 02:00 AM
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Originally Posted by legierk View Post
I realize this is an old thread. But I recently got one of these off Amazon and it works great. Can't understand why this is such an issue to this day. Anyhow, any newer options available? Would be nice to see a consolidated list.
Not all of us run real new components with triggers everywhere
Don't know of anything new but then I haven't looked. But I did purchase a second one just a couple months back when I got my
new Atmos capable AVR. I now had to start 5 Adcom class A/B stereo amps at turn-on plus my outboard stereo DAC and was a bit nervous about the current demand. Now the 2 share the load on my 20 amp dedicated line. They're inexpensive so cost was no big issue. They've worked without issue for me and I'm very pleased with the purchases.
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post #37 of 49 Old 10-02-2018, 07:04 AM
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HI folks, to raise a pretty dead thread id appreciate any assistance. I would like to to add auto on to my older subwoofer amp via my Yamaha avr trigger out..or any other simple solution. Would i just buy this https://www.adafruit.com/product/2935#tutorials And hook up a 3.5 mini cord from the avr trigger out to this strip?

This seems easy but than i would have two power strips one for the existing equipment and now this just for the amp?

Or if anyone has any suggestions due to more recent products id appreciate it. Some kind of smart plug maybe (NON-DYI)
Maybe some kind of auto on off power strip that I could plug the AVR into and then would turn everything on when the avr is activated?
Like this https://www.amazon.com/Tripp-Lite-Pr...cm_wl_huc_item

Last edited by kbuzz; 10-02-2018 at 07:38 AM.
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post #38 of 49 Old 10-02-2018, 10:54 PM
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Quote:
Originally Posted by kbuzz View Post
HI folks, to raise a pretty dead thread id appreciate any assistance. I would like to to add auto on to my older subwoofer amp via my Yamaha avr trigger out..or any other simple solution. Would i just buy this https://www.adafruit.com/product/2935#tutorials And hook up a 3.5 mini cord from the avr trigger out to this strip?

This seems easy but than i would have two power strips one for the existing equipment and now this just for the amp?

Or if anyone has any suggestions due to more recent products id appreciate it. Some kind of smart plug maybe (NON-DYI)
Maybe some kind of auto on off power strip that I could plug the AVR into and then would turn everything on when the avr is activated?
Like this https://www.amazon.com/Tripp-Lite-Pr...cm_wl_huc_item
Yes, just use the adafruit product I listed. Hook up the Yam trigger out to the strips input sensor. It is easy.

For the rest, how many outlets do you need? The ada strip has 4 outlets, 2 normal off, 1 normal on, and 1 always on. You could plug the Yami into the always on, plug the sub into the first normal off and other power strip into the other normal off, Then the rest of the gear into that power strip. Now when you turn the Yami on, the complete system will power on..
Lots of other ways to get gear running when you need/desire, just think it thru.

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post #39 of 49 Old 10-03-2018, 10:40 AM
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Quote:
Originally Posted by Sal1950 View Post
Yes, just use the adafruit product I listed. Hook up the Yam trigger out to the strips input sensor. It is easy.

For the rest, how many outlets do you need? The ada strip has 4 outlets, 2 normal off, 1 normal on, and 1 always on. You could plug the Yami into the always on, plug the sub into the first normal off and other power strip into the other normal off, Then the rest of the gear into that power strip. Now when you turn the Yami on, the complete system will power on..
Lots of other ways to get gear running when you need/desire, just think it thru.
Sal thanks so much for the reply. right now i need 5 outlets with the AVR. I anticipate needing at least one more in the future...
the ada fruit looks great but now i have to run two strips......wont be neat but will work

Also do you happen to know if there is a minijack plug input on the adafruit or do you have to hard wire the 12v trigger from the avr? Cant tell thanks

Last edited by kbuzz; 10-03-2018 at 11:40 AM.
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post #40 of 49 Old 10-03-2018, 11:52 AM
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Quote:
Originally Posted by kbuzz View Post
Sal thanks so much for the reply. right now i need 5 outlets with the AVR. I anticipate needing at least one more in the future...
the ada fruit looks great but now i have to run two strips......wont be neat but will work

Also do you happen to know if there is a minijack plug input on the adafruit or do you have to hard wire the 12v trigger from the avr? Cant tell thanks
No input jack. You cut off the plug on one end of the cable, strip the wires, insert them into holes on the strips input, and tighten a couple screws that grab the wires.
Easy peasy

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post #41 of 49 Old 10-03-2018, 12:06 PM
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Gotcha. That works.. Thanks again. Although im thinking may just be eaiser to buy a smart power strip and plug the avr into the master...that way i only have one strip....something like this:

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post #42 of 49 Old 11-09-2018, 10:25 AM
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I ended up with the Tripplite as well. Same price as the Adafruit option but with more switched outlets.

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post #43 of 49 Old 11-09-2018, 01:22 PM
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Just some food for thought.

I was concerned when doing my system that switching on the 5 separate Adcom power amps plus the DAC would have been too high a current surge for the relay in a single strip. Using a pair of the ADA strips, both with their own heavy duty power cords plugged into my 20 amp circuit gave me peace of mind the there would be no supply issues.

YMMV

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post #44 of 49 Old 11-10-2018, 12:10 AM
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Luckily for me I only need to power a single amp and maybe a few fans.

Audio: Denon AVR-X3400H - Behringer NX6000D - miniDSP
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post #45 of 49 Old 02-18-2019, 07:29 PM
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Switch noise amplified with IoT relay

I picked up the IoT relay (http://www.digital-loggers.com/iot2faqs.html) from Amazon, partly due to this thread. A pretty impressive little unit. Very solid, nicely built, works great. I have an Onkyo AVR with the brilliant feature that the 12 V trigger is only zone 2. So I have it set up so that when I power on my Sony Bravia, a USB port on it powers up and triggers the relay, which then switches on the Adcom GFA 555-II that drives my two main speakers. Powering on the Sony also switches on the Onkyo through standard CEC, so it all works great. Powering off the Sony also powers off the Adcom. The only problem is when the switch on the relay is clicked on, the switching is amplified pretty loudly through my speakers. I doubt it's an issue, but it is very unpleasant. Any suggestions to eliminate/minimize that? And I am correct to assume that it won't damage my Klipsch RP-280F mains?
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post #46 of 49 Old 02-18-2019, 08:31 PM
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Quote:
Originally Posted by CalJake View Post
I picked up the IoT relay (http://www.digital-loggers.com/iot2faqs.html) from Amazon, partly due to this thread. A pretty impressive little unit. Very solid, nicely built, works great. I have an Onkyo AVR with the brilliant feature that the 12 V trigger is only zone 2. So I have it set up so that when I power on my Sony Bravia, a USB port on it powers up and triggers the relay, which then switches on the Adcom GFA 555-II that drives my two main speakers. Powering on the Sony also switches on the Onkyo through standard CEC, so it all works great. Powering off the Sony also powers off the Adcom. The only problem is when the switch on the relay is clicked on, the switching is amplified pretty loudly through my speakers. I doubt it's an issue, but it is very unpleasant. Any suggestions to eliminate/minimize that? And I am correct to assume that it won't damage my Klipsch RP-280F mains?
No idea how to eliminate the noise, sorry.
But unless the noise is loud in the extreme I wouldn't worry about it. How loud is that? I don't know but unless it makes you reflex to plug you ears, it's probably OK.
By the way, pretty ingenious using USB power to operate the relay, I salute you.

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HSU Research 5.2 speaker system (4) HB-1 MK2, (1) HC-1 MK2, (2) STF-2,
Klipsch HT500 satellites (4) for ceiling mounted ATMOS playback
DIY Linux desktop w/Strawberry bit perfect media center. Emotiva Stealth DC-1 DAC

Last edited by Sal1950; 02-18-2019 at 08:34 PM.
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post #47 of 49 Old 04-18-2019, 05:48 PM
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Have you had any issues with the adafruit? My Marantz SR7009 has a 12 V DC/150 mA trigger-compatible device spec which I assume is the same across the Marantz line of receivers. I don't see a spec on the adafruit so I thought I would ask a user.


Quote:
Originally Posted by Sal1950 View Post
Old post I know but I'm sure @DonH50 is still around. There's still a curious lack of off the shelf products on the market for what seems like a relatively common need?
Don (or anyone else) I've got one of these trigger strips
https://www.adafruit.com/product/2935
coming to fire up my power amps from the 12 trigger of my Marantz AV7701. Do you think I should still use the diode or a cap of some type across the trigger input as was discussed here?
TIA
Sal

Spoiler!
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post #48 of 49 Old 04-19-2019, 09:26 AM
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Quote:
Originally Posted by zeuspaul View Post
Have you had any issues with the adafruit? My Marantz SR7009 has a 12 V DC/150 mA trigger-compatible device spec which I assume is the same across the Marantz line of receivers. I don't see a spec on the adafruit so I thought I would ask a user.
No, no issues at all.
I'm not a engineer but the adafruit units use some type of sensing circuit that will operate over a wide range of input voltages. DonH50 also provided some input back on a 1-1-2018 post here.



"Universal control voltage 3-60VDC or 12-120VAC, or connect directly to a 12V, 48VDC, or even 120VAC circuit."


I've had 2 of them controlling the turn-on of my 5 power amps from my Marantz pre/pro for almost a year and a half now with no problems.
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post #49 of 49 Old 04-21-2019, 09:46 AM
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Save the cost of shipping ($11 to my location) if you have Amazon Prime:
https://www.amazon.com/Iot-Relay-Enc.../dp/B00WV7GMA2
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