If you added a switch between the SSR power source and power input pin, that could be used to enable the speakers. It’s at amp positive voltage and flows a bit of current (tens of mA) so not a low current 5v logic level.
OK. Not exactly what I had in mind, an on board optocoupled 3.3V input was more of my personal liking.
Can you please remove my entry for the time being from the SSR group buy, I need to evaluate the possible options
Can you please remove my entry for the time being from the SSR group buy, I need to evaluate the possible options
Hi Sunshade,
Ok, removing you from GB 2 interest list. We will keep the “remote enable” as a possible feature on a future revision. Revisions with turn key overseas production houses are painfully slow. Hence , we are sticking with this proven design for now.
I increased my interest to 16 units and we can get this GB started. I will open a pre-order on Etsy for you to place your orders. Please update here to indicate if you have placed your preorders.
Please place preorders here:
RTR Solid State Relay SSR DC Protection | Etsy
Thanks!
Ok, removing you from GB 2 interest list. We will keep the “remote enable” as a possible feature on a future revision. Revisions with turn key overseas production houses are painfully slow. Hence , we are sticking with this proven design for now.
I increased my interest to 16 units and we can get this GB started. I will open a pre-order on Etsy for you to place your orders. Please update here to indicate if you have placed your preorders.
Please place preorders here:
RTR Solid State Relay SSR DC Protection | Etsy
Thanks!
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xrk971 16 units USA *increased*
tcpip 6 units USA
mbrennwa 6 units Switzerland / ordered + payed @ Etsy
Andyr 4 units AUS
Sunshade 8 (-8) units ITALY *removed*
Schlomoff 4 units FR
jwjarch 4 units USA
tcpip 6 units USA
mbrennwa 6 units Switzerland / ordered + payed @ Etsy
Andyr 4 units AUS
Sunshade 8 (-8) units ITALY *removed*
Schlomoff 4 units FR
jwjarch 4 units USA
Hi xrk, is there any way the SSR units can be modded to deal with switch OFF thump too? I mistakenly thought they would do this.
Will have to ask Jhofland about this. For a future version we would make the previously requested speaker enable function via logic be available and that could be used to control the speaker shutdown sequence through a smart supervisor circuit on the SSR soft start module that is currently under development.
I am thinking out loud here, I suppose a small AC-DC SMPS like Meanwell PCB mounted unit connected to the AC input from a switched IEC can make say, 19v or 24v. This could be used to power the SSR rather than the PSU rails (which have large caps that drain slowly). Once the power switch goes, the SSRs get disconnected right away. I could test this out to make sure it works.
Other low cost ways to get 24vdv cheaply include a cellphone USB wall charger to get 5vdc, then a low cost 5vdc to 24v dc-dc could be used. All for under $6.
I am thinking out loud here, I suppose a small AC-DC SMPS like Meanwell PCB mounted unit connected to the AC input from a switched IEC can make say, 19v or 24v. This could be used to power the SSR rather than the PSU rails (which have large caps that drain slowly). Once the power switch goes, the SSRs get disconnected right away. I could test this out to make sure it works.
Other low cost ways to get 24vdv cheaply include a cellphone USB wall charger to get 5vdc, then a low cost 5vdc to 24v dc-dc could be used. All for under $6.
Hey Fellas,
This tiny MeanWell would work nice as a dedicated psu for the SSR DC protection boards.
IRM-01-24 MEAN WELL | Mouser
Although, I do not have any thump noise when powering off.
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Yep, that would work well. Those are pretty easy to use and low noise too. The price is right. 🙂
I have a 100mA 24v Meanwell I’ll try. Or the cheapo 5v phone charger and 24v step up.
I have a 100mA 24v Meanwell I’ll try. Or the cheapo 5v phone charger and 24v step up.
A conceptually easier way is to use a diode, resistor, and relatively modest sized electrolytic that is connected to one of the transformer secondaries to generate a DC voltage suitable for powering the SSR. When power is shut off you want this supply to decay away much faster than the main power reservoir caps.
Details to be determined.
Details to be determined.
Thanks for the suggestions everyone, if you could try a separate little PSU that would be great. It would have to be quite fast. I am using Aleph J direct to compression drivers in an active setup so can't afford any noise at switch on or off!
I just tested the concept of using a 5v USB phone charger to power a 24v DCDC step up to power the SSR. With the 5v USB tied to same switch as main PSU, speakers cut off instantly. You can see that the main rail caps LEDs are still glowing.
XRK Audio on Instagram: “Testing capability of SSR to disable speakers off quickly using external 24v SMPS powered from 5v USB phone charger tied to same circuit as…”
XRK Audio on Instagram: “Testing capability of SSR to disable speakers off quickly using external 24v SMPS powered from 5v USB phone charger tied to same circuit as…”
Hi X,
I clicked on your link and noticed that:
a) the SSR contains a number of SMD parts, but
b) the PCB is fully made up.
Am I correct, here?
Thanks,
Andy
Yes, it’s RTR (ready to run) fully assembled and tested. You just install connectors of your choice.
And are these mono - or stereo - boards, X? I'm presuming mono - so I need 1 per amp PCB?
Andy
Hi Xrk, instead of inside amplifier I would like to put this soft start in my main AC filter supply case, it has a big isolation transformer 230v-230v for all components in the system (audio,computer and video).
Does it makes sense? Is there a board for one only primary leadout transformer? dissapoint not having the remote feature on a one single transformer version.
Jordi.
Does it makes sense? Is there a board for one only primary leadout transformer? dissapoint not having the remote feature on a one single transformer version.
Jordi.
