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XEN SHPP -- Simple Headphone Protection
XEN SHPP -- Simple Headphone Protection
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Old 20th June 2017, 07:15 PM   #21
Morde is offline Morde  Finland
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Sorry, but I unfortunately don't have the time to organize a group buy. I understand perfectly that Patrick is a busy man too. If somebody else is willing to be a group buy organizer, I would buy two boards.
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Old 21st June 2017, 06:51 AM   #22
dabore84 is offline dabore84  Netherlands
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XEN SHPP -- Simple Headphone Protection
Quote:
Originally Posted by Morde View Post
Sorry, but I unfortunately don't have the time to organize a group buy. I understand perfectly that Patrick is a busy man too. If somebody else is willing to be a group buy organizer, I would buy two boards.
I'm on it, got green light from Patrick to organize group buy. Just need to sort some things first about postage. The tread will open tomorrow in GB.
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Old 4th July 2017, 07:36 AM   #23
dabore84 is offline dabore84  Netherlands
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XEN SHPP -- Simple Headphone Protection
Here is the GB thread:
GB XEN SHPP (Simple Headphone Protection)

Maybe handy to put it in first post for the time being and I will inform when to remove?
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Old 4th July 2017, 08:31 AM   #24
EUVL is offline EUVL  Europe
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No, sorry.

I had problems with the forum with just a few people wanting PCBs.
And before you know they moved everything to the GB forum.
Those threads IMHO do not belong to the GB forum by any means.

For example :
http://www.diyaudio.com/forums/group...ikoflexer.html
It is not even a thread started by me.

It is best to separate technical and GB threads completely.


Thank you for your understanding,
Patrick
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Old 4th July 2017, 09:04 AM   #25
dabore84 is offline dabore84  Netherlands
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XEN SHPP -- Simple Headphone Protection
No problem, I just organize from your experience
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Old 31st August 2017, 12:26 PM   #26
jameshillj is offline jameshillj  Australia
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Is there a simple idiot-proof way to as a 'mute' function? Maybe not many people are interested, but if it could be done, and also maybe an indicator led...?
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Old 31st August 2017, 06:39 PM   #27
EUVL is offline EUVL  Europe
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You can connect a switch in series with the series resistor for the relay.
The latter is to compensate for different rail voltages).
Just switch open the relay manually and you will have mute.

Same for the LED, just wire a LED and a resistor in series with the relay coil with flying leads.
Easy enough to do for those who must.


Patrick
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Old 31st August 2017, 07:51 PM   #28
EUVL is offline EUVL  Europe
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Can of course place the LED in series with the relay if you have 2V headroom to drop.


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Old 15th October 2017, 09:46 AM   #29
EUVL is offline EUVL  Europe
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While preparing for the test platform for the Pioneer Super Linear HPA,
The Pioneer Super Linear Circuit

I built another SHPP for +/-15V, and added the off-board LED and R20.
Note that the value of R20 should be reduced by ~700R when using a blue LED (to allow for the voltage drop of the latter).

A mute switch can simply be added in series with the LED.
It will allow you to manually break the supply circuit for the protection relay.

QED.


Patrick

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File Type: jpg 171015 SHPP w LED.JPG (87.3 KB, 201 views)
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Old 15th October 2017, 04:27 PM   #30
Stixx is offline Stixx  Germany
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