Speaker Turn On Delay and DC Protector Board Set (V3) - diyAudio
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Old 10th December 2013, 09:40 AM   #1
Jason is offline Jason  Australia
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Default Speaker Turn On Delay and DC Protector Board Set (V3)

This thread is for discussions about the new Speaker Turn-On Delay and DC Protector boards (V3). This is an updated version of the V2 boards, primarily to make them compatible with the 10x10 grid mounting pattern we've now standardized on so they can be easily mounted to Deluxe chassis baseplate, riser panels, front panels and/or heatsinks. Refer to the V2 discussion thread for additional information.

For more information on this product, please see the product page.

Change History
  • 2.0 First Production Release
  • 2.0.1 Added Board Dimensions
  • 3.0 New Layout
    • Double sided board
    • Added Keystone connectors as option
    • Conforms to 10mm mounting grid
  • For future changes
    • Add polarity markers for electrolytic capacitors

Information
  • Product Page
  • BOM - Attached below
  • Schematic - Coming soon
  • Dimensions - 100mm x 50mm
Attached Files
File Type: pdf Speaker Protection Board V3 BOM.pdf (32.8 KB, 1117 views)
File Type: zip Speaker Protection Board V3 BOM.xls.zip (37.5 KB, 334 views)

Last edited by Jason; 14th January 2014 at 10:20 AM.
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Old 21st December 2013, 02:45 PM   #2
Gibbi is offline Gibbi  United States
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Jason,

What is power limit for the DC protector boards?

Thanks,
Scott
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Old 21st December 2013, 10:30 PM   #3
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Gibbi
Relay spec says 5A @125VAC into a resistive load
However it also says 10A if the Normally Closed connection is not used (it isn't used on the Delay board).
so.....
625W theoretically but I won't be the brave soul who tries out the limit.
:-)

Spec of relay is here
http://www.components.omron.com/comp...5LA_E_0911.pdf

Last edited by UKToecutter; 21st December 2013 at 10:33 PM.
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Old 5th January 2014, 04:29 PM   #4
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Is there a link anywhere to see the schematic for these to check if they are suitable for my application ?
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Old 5th January 2014, 04:36 PM   #5
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This is the current schematic;
It will be on the site shortly

Click the image to open in full size.

It pretty benign and can be used in applications other than the F5 and F5T.
U1.1 is ground and U1.2 is + supply

Last edited by UKToecutter; 5th January 2014 at 04:42 PM. Reason: additional info
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Old 9th January 2014, 12:30 AM   #6
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Toecutter, what is the issue with this circuit and the F5 and F5T? Is it the impedance of the sense circuit relative to the low impedance feedback circuit of the F5? If so, would it be an issue with other CFB amps as well?
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Old 9th January 2014, 12:43 AM   #7
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Bob,
I think you misunderstood what I said.
I don't believe there is any issue with this board and the F5 & F5T.
What I was saying is that I believe this would be suitable for many other amplifiers as well.
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Old 9th January 2014, 12:55 AM   #8
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Ah, that was the way I read it first and then it flipped. Thanks.
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Old 30th January 2014, 03:17 AM   #9
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Built mine out today and both LEDs light up continuously from the start, immediately engaging the relays.

Everything look right? I had my LEDs in the opposite from what I expected, I think I got everything else correct.

Click the image to open in full size.
Click the image to open in full size.
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Old 3rd February 2014, 05:44 PM   #10
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So the 3.0 BOM has Q1,Q2,Q3,Q5,Q6 as 512-KSC945CGBU which are ECB according to http://www.fairchildsemi.com/ds/KS/KSC945.pdf but the board is made for EBC.
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