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Old 11th February 2013, 04:21 PM   #511
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TELSTAR: I have been told from RSOnline today that a cancellation of my order is not possible.
RONNY: thank you for your kind answer.
In the meantime METAL and I have committed on a scheme that will be able to "understand / learn " the transmitted codes
of your remote-control unit.

Best regards - Rudi_Ratlos
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Old 11th February 2013, 04:22 PM   #512
lucylu is offline lucylu  England
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Quote:
Originally Posted by ronnydepony View Post
I have all the time you need Rudi.



Regards,
Ronny
Yes same here john
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Old 11th February 2013, 04:27 PM   #513
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John: George Stantscheff told me how to measure / match the LDRs.
This is the only point missing (the results of my measurements) before I release this project.

Best regards - Rudi_Ratlos
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Old 14th February 2013, 06:51 PM   #514
abc4230 is offline abc4230  Germany
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Hi Rudi,
I am also interested in the pre-amp project.

mfg abc4230
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Old 14th February 2013, 09:19 PM   #515
atupi is offline atupi  Romania
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More inputs would be great, at least 4. (DAC, CD, Phono, Sat receiver)
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Old 14th February 2013, 09:35 PM   #516
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Adrian, this AMP does not include a Phono-PreAmplifier!

Best regards - Rudi_Ratlos
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Old 16th February 2013, 12:20 PM   #517
atupi is offline atupi  Romania
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I know it doesn't include phono preamp, i was saying would be nice to have 4 inputs and one of them i would use for an external phono preamp
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Old 16th February 2013, 12:44 PM   #518
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I am very sorry, Adrian, to be not able to provide you 4 input sources.
The number of input sources is restricted to 3 due to the current layout (size of the PCB: 100 x 100 mm).

I have been asked by a number of German FC-100 group-buyers to provide them a remotely-controlled "PowerOn/PowerOff ("Standby") functionality" - and I will provide it - see the attached image, the leftmost relay.
This relay can be used to power on/off your FC-100. I will tell you how to do it.

Best regards - Rudi_Ratlos

P.S. I am still waiting for the ordered LDRs to arrive. Maybe on coming Tuesday.
Just let me think this over again. Do I really need a "Mute Relay"?
Attached Images
File Type: png Image1.png (61.2 KB, 408 views)

Last edited by Rudi_Ratlos; 16th February 2013 at 01:08 PM.
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Old 16th February 2013, 05:14 PM   #519
atupi is offline atupi  Romania
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Will be the software shared also if i want to do some changes/tuning ?
Does the uC keeps the setting after is disconnected from power ?
I have a working preamp based on Atmega 8515 and Pga 2310 annd is working great but the LDR 's sounds better.
Adrian
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Old 27th February 2013, 04:56 PM   #520
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Gentlemen, I am doing some nice progress with my current project: "A general audio supplementary PCB" - see pictures attached.

The PCB includes the following functionality: George Stantscheff's Lightspeed Attenuator (being controlled by a motorized potentiometer),
Source Selection, Mute Function, 2 Temperature Sensors, StandBy (Switch the FC-100 on/off), LCD display, everything being controlled
by Infrared with the ability to learn the codes of your control unit, ...

After 3 weeks of waiting I finally received 16 NSL-32SR2 Silonex opto-couplers and measured them at different currents flowing through the LED.

This is the result:

Click the image to open in full size.
http://www.abload.de/img/image1f2iiu.png

There are at least 4 pairs of LDRs that match very well and can be used for George's "Lightspeed Attenuator".

METAL, who did the software part of this project, has provided me an absolutely fail-safe, professional program for the used PIC µProcessor.

I have "cannibalized" an old SYMASM to test the functionality of the PCB in real life, before I will "marry" this PCB with my GEM-amplifier,
the FC-100, which still is "the very best DIY-amplifier that I have ever listened to".

I will keep you informed about my progress.
Best regards - Rudi_Ratlos

P.S. The image below shows the prototype PCB. The layout of the final PCB is shown in post #518.
Attached Images
File Type: jpg nsl 006.jpg (264.0 KB, 291 views)
File Type: jpg nsl 003.jpg (423.9 KB, 286 views)

Last edited by Rudi_Ratlos; 27th February 2013 at 05:10 PM. Reason: P.S. added
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