How to build a 21st century protection board

[jwilhelm]

You would likely be better to use two separate boards. Otherwise you would need to connect both amplifier grounds together for DC detection, leaving you open to ground loops. You can populate one speaker relay on each board. That's the most expensive part of the board.

 

[jwilhelm]

I've got a basic design almost ready to prototype of isolated speaker protection circuits. This would be perfect for dual monoblock designs.

 

[yngvejos]

That was my concern, then two boards it is. Glad I have a big chassis.
So if I want to use only the speaker in/out below Q10, I leave Q1, Q9, I2 and R4 and R6 unpopulated?

Im looking forward to play with these boards. I'm currently offshore but I brought with me an Ardunio Uno to play so that I can play with the software part.

 

[jwilhelm]

You can also leave C11 and C14 out.

 

[jwilhelm]

I've been finding a lot of uses for the Arduino platform. Hopefully in a couple months I'll have software writing down. It's starting to get easier. Here's a lighthouse beacon I've been building for a guys cottage. Remote control rotation speed, brightness and output pattern selection.

 

[quan]

Hi guys, a question regard 12VDC relays. I have a bunch of relays rated 10A 277VAC which i intend to use for the soft start . Would they be alright?. My transformer is 800VA.
Quan

 

[kool lites]

Do you have a part number for the relay?

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[quan]

Do you have a part number for the relay?

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Yep, OEG ORWH-SS-112D1f.
Quan

 

[still4given]

Yep, OEG ORWH-SS-112D1f.
Quan

Here is a board for use with those relays.

 

[ostripper]

How fast does it reacts in case of a short circuit?

Way faster than a 10A fuse will blow.

Same with DC , a couple mm woofer movement .... "eye burning" red
flashing LED.

Flawless (just about idiot-proof).

OS

 

[ostripper]

I've been finding a lot of uses for the Arduino platform. Hopefully in a couple months I'll have software writing down. It's starting to get easier. Here's a lighthouse beacon I've been building for a guys cottage. Remote control rotation speed, brightness and output pattern selection.

I love to see that with RGB LED's !!!

OS

 

[quan]

Here is a board for use with those relays.

Thanks Terry, but i would not know how to etch those boards.
Quan

 

[quan]

Thanks Terry, but i would not know how to etch those boards. But i will try to hard wire it.
Quan

 

[kool lites]

Quan pitty your not local to me. I could show how to home etch.
Relays should be ok.
800VA/220V=3.6 amps divide by .8 fpr power factor and double it for safety at switch on, gives you 9 amps.

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[quan]

Quan pitty your not local to me. I could show how to home etch.
Relays should be ok.
800VA/220V=3.6 amps divide by .8 fpr power factor and double it for safety at switch on, gives you 9 amps.

Sent from my GT-I9505 using Tapatalk

Thanks man, may be one day.
Quan

 

[still4given]

Thanks Terry, but i would not know how to etch those boards.
Quan

Shouldn't be too tough to do on a vero-board. I could also provide gerbers if someone wants to order some. Should be very inexpensive.

 

[thimios]

The control board is 77 x 97mm. I haven't put any thought into a group buy. Gerbers are always available, and I usually have a couple left over test boards with minor errors to work around.

Gerbers are always available
I like this.

 

[quan]

Shouldn't be too tough to do on a vero-board. I could also provide gerbers if someone wants to order some. Should be very inexpensive.

Thanks Terry, what is the size of the board so i can check it out?.
Quan

 

[still4given]

Thanks Terry, what is the size of the board so i can check it out?.
Quan

The board or 48mm x 48.5mm.
we could fit 4 of them on one 10cm x 10cm board and get in under the prototype discount. I'm not sure what they charge for score lines but that would be a really cheap way to do it. I was able to put 6 of them on a 4" X 6" board. These should work well in a tight chassis when using a reasonable sized PSU.

 

[quan]

The board or 48mm x 48.5mm.
we could fit 4 of them on one 10cm x 10cm board and get in under the prototype discount. I'm not sure what they charge for score lines but that would be a really cheap way to do it. I was able to put 6 of them on a 4" X 6" board. These should work well in a tight chassis when using a reasonable sized PSU.

That is great Terry, may i have the gerbers?.
Quan