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Old 5th September 2011, 11:06 PM   #61
PeterH is offline PeterH  Germany
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Join Date: Sep 2004
Location: Planet Earth
Hi Rudi,

i would also like to join the group buy with

4 SYMASYM Boards
4 PSU PCBs
8 LS protect Boards

Hope it is not too late! Thank you!

Best regards,
Peter
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Old 6th September 2011, 07:41 AM   #62
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Join Date: Aug 2011
Hi Rudi,

thanks for the infos to the Soft Power On Circuit. I'll give it a try. Please add also 7 PCBs for the Soft Power On for me.

Thanks and regards,

Chris
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Old 6th September 2011, 07:42 AM   #63
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Join Date: May 2008
Location: NRW
Hello Rudi,

please add for me further PCB's:

2 Symasym boards
2 PSU PCB's

Thank you for sending the manual.

Best regards
Andreas
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Old 6th September 2011, 09:06 AM   #64
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This group-buy will be closed on Friday, 9th of September.

Best regards - Rudi_Ratlos
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Old 6th September 2011, 11:39 AM   #65
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
post58 schematic:

I don't recognise what LSP1 & LSP2 means. Are these the mains Live and Neutral connections/feeds?

The terminals labeled 220V Back is actually the mains return lead. Usually labeled Neutral. But why does it go through the Primary of the 12Vac transformer before tapping into the Mains Neutral?
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Old 6th September 2011, 12:54 PM   #66
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Andrew,

mains return = mains neutral in my glossary.

LSP1 and LSP2 is the EAGLE name for a solder point.
(I will change the layout to show a 2-pole PCB connector there.)

You have to connect an on-/off - switch to this connector / to these solder points.

The switch connects the small transformer on the left side to the mains hot lead.
When the switch is turned on, the mains voltage is applied to the transformer, the 7812 will generate 12 VDC, the upper relay K1 is closed
and current will flow through K1 and the thermistors, being delimited by the value of the thermistors.
When the LM555 timer triggers and closes K2, the mains current will flow "unhindered".

So this circuit delimits the inrush current for a short period of time (determined by R1/C1).

I hope this explanation was helpful.

Best regards - Rudi_Ratlos
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Old 7th September 2011, 06:25 AM   #67
tome is offline tome  Macedonia
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Join Date: Apr 2010
Location: Macedonia
Hi Rudi
You also have output tranzistors, are they matched ?
Put me on list for 2 sets (8 pcs.) if they are matched.
Best regards
tomas
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Old 7th September 2011, 09:57 AM   #68
AndrewT is offline AndrewT  Scotland
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Rudi,
I still don't understand why the mains return from the big transformer has to pass through the small 12Vac transformer Primary.
The schematic has lost me !
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Old 7th September 2011, 12:22 PM   #69
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Default A picture will tell you more than a 1000 words ...

Click the image to open in full size.

http://www.abload.de/img/andrewk8th.png

Best regards - Rudi_Ratlos
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Old 7th September 2011, 01:45 PM   #70
AndrewT is offline AndrewT  Scotland
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Now I see and understand.
What a confusing way to draw that original diagram.
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