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Old 14th May 2011, 09:51 AM   #711
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Location: The Netherlands
Does anyone know if Mikkel is already back in bussiness?
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Old 14th May 2011, 09:59 AM   #712
yairf is offline yairf  Israel
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AFAIK his kits are still available, try to PM him.
Yair
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Old 14th May 2011, 10:15 AM   #713
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I read there was a bit difficulty reaching him a while ago. I already mailed him, let's give him a couple of days to respond.

(Need a new resistor-set for my RelVol3)
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Old 14th May 2011, 04:28 PM   #714
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Well, no problem reaching him. He just replied an I just ordered my resistorkits!
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Old 8th August 2011, 02:24 PM   #715
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Default Dantimax Kit to Control Lighter Note LDR Attenuator

Hi Mikkel,

I am soon to order the Lighter Note LDR attenuator. Unfortunately it does not have a remote control solution and I am inquiring how one of your kits could control the LN, preferably a solution using your input switching and LCD display.

The manual for the Lighter Note is here: http://dl.dropbox.com/u/12927016/Lig...10%20-%204.pdf

The volume is controlled with the 1K pot which varies the current to the LDRs. Perhaps I am over simplifying things, but it seems to me that one of your volume kits (motorized pot, PGA2310, stepped attenuator) could be configured to replace a 1K pot. Would this be possible?

PS: I note in the manual that in the parts list the 1K pot is speced as "log" while in the assembly instructions it is referred to as "linear." I have an email in to the designer for clarification.
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Old 8th August 2011, 10:07 PM   #716
mcs is offline mcs  Denmark
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Quote:
Originally Posted by mike_mcf View Post
The volume is controlled with the 1K pot which varies the current to the LDRs. Perhaps I am over simplifying things, but it seems to me that one of your volume kits (motorized pot, PGA2310, stepped attenuator) could be configured to replace a 1K pot. Would this be possible?
Yes. You could use a motorised pot - the 1k value may be a slight problem though. If all you need is a variable DC voltage, you could use an R-2R DAC also (a '595 and some resistors) "emulating" a PGA2310. A relay attenuator emulating a 1k pot would be no problem, but that would be a bit expensive for just providing a DC voltage. I think some IC's that emulate pots are available also. What DC voltages are required? You don't have a manual with a schematic?

Any of the control boards can be used (with or without inputs selectors and displays) in any case.

Best regards,

Mikkel C. Simonsen
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Old 9th August 2011, 04:46 AM   #717
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Quote:
Originally Posted by mcs View Post
Yes. You could use a motorised pot - the 1k value may be a slight problem though. If all you need is a variable DC voltage, you could use an R-2R DAC also (a '595 and some resistors) "emulating" a PGA2310. A relay attenuator emulating a 1k pot would be no problem, but that would be a bit expensive for just providing a DC voltage. I think some IC's that emulate pots are available also. What DC voltages are required? You don't have a manual with a schematic?

Any of the control boards can be used (with or without inputs selectors and displays) in any case.

Best regards,

Mikkel C. Simonsen
There are some 1K motorized pots out there (I need log taper by the way), but not from Alps. Do the motorized pots work with the LCD display?

I had some trouble finding an IC because I wasn't really sure what I was looking for. Others suggested a DAC, but I don't understand that technology. There are 1K digital pots, but most of them were 64 step and/or linear and once again I didn't really know what I was looking for. The chipvol1 offers more steps, full attenuation and is silent, so if that would work it would be great.

The relay attenuators might be OK cost wise as I already have a control 2, an input1, and a c2panel1-2, so I think I just need to add a relvol1.

The manual says "The pot acts as RSET for the LM334, i.e. it regulates how much current passes through the 2 LEDs and thus how bright they are. These in turn change the resistance of the LDRs – the signal passes through the LDRs not the pot." I don't have schematic and I think the designer is keeping that secret. I am committed to the Lighter Note, so I could buy it and just measure the current and voltage or ask the designer. Is this what you need to know in order to recommend the best approach?
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Old 5th December 2011, 10:53 AM   #718
planar is offline planar  Italy
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Default Manuals !

Hi Mikkel,

I know that you must be very busy in this time of the year, but I see that most of the questions are about the features / configuration of you great boards.
I think you would spare a lot of messages (like mine, sorry to spam your mailbox !) if you only put the manuals online.

just my two cents...

Vincenzo (the one who asked for balance control using Control2/RelVol3...)
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Old 15th December 2011, 06:33 PM   #719
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I purchased a kit from Dantimax Mr. Mikkel Simonsen. This unfortunately has arrived incomplete. I sent many emails but all with no response. Now I find myself with a unusable kit . Unfortunately I read late comments on this strange and unreliable person. If I can give you some advice, forget dantimax. Commerce (including online) does not do so.
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Old 6th August 2013, 05:24 PM   #720
Bidoux is offline Bidoux  France
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What is the simplest way of adding a digital control to the RelVol1 kit ? I have bought one from dantimax but only now I realize that what I needed was the RelVol1c . I have tried adding a 89C4051 and an encoder following the RelVol1c schematic but can't get it to work.

I am looking to use it as a volume control for a headphone amp but I really don't have the slightest clue when it comes to digital stuff ...
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