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Old 20th December 2010, 01:50 PM   #1671
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APEX H900 from Indonesia
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Old 20th December 2010, 04:35 PM   #1672
fotios is offline fotios  Greece
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Quote:
Originally Posted by Bonsai View Post
Here are some pictures and a short write up on my new pre-amp. This is still 'in development'.

Line Pre-Amplifiers | hifisonix.com

The new stuff is after the X-Altra Mini write up below the ****************

Merry Xmas and best wishes for 2011 BTW to everyone!
Wow!
Excellent additions in your existing project. My compliments Bonsai!
Merry Christmas and happy new year from me, too.
Fotios
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Old 21st December 2010, 05:09 AM   #1673
Bonsai is offline Bonsai  Taiwan
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Thanks Fotios!
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Old 21st December 2010, 07:02 AM   #1674
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Quote:
Originally Posted by Bonsai View Post
Here are some pictures and a short write up on my new pre-amp. This is still 'in development'.

Line Pre-Amplifiers | hifisonix.com

The new stuff is after the X-Altra Mini write up below the ****************

Merry Xmas and best wishes for 2011 BTW to everyone!
I want to build your preamp or something similar. I just have 3 sources (sound card, CD , cable box). Might just put it right in my amp case. very simple design , wife wants a headphone output .. too. That diamond buffer headphone amp is nice .. in the GFB loop of the op-amp.

OS
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Old 21st December 2010, 07:30 AM   #1675
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Quote:
Originally Posted by Bonsai View Post
Here are some pictures and a short write up on my new pre-amp. This is still 'in development'.

Line Pre-Amplifiers | hifisonix.com

The new stuff is after the X-Altra Mini write up below the ****************

Merry Xmas and best wishes for 2011 BTW to everyone!
I really enjoyed the previous article for your other preamp design. Are you planning writing something similar for this design?
Your writing style is quite amazing, explaining all the bits of things and why did you take each decision.

Congratulations,
Regards
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Old 21st December 2010, 10:40 AM   #1676
Bonsai is offline Bonsai  Taiwan
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Thanks regiregi22. Yes, I will write this one up as well. A good few months out though. I need to get to grips with writing a display driver (in C). Lucky I can access some gurus at work to help me. I am a s/ware novice, but I'm heading in the right direction! BTW I was in Malaga this year in August at the flamenco festival for a vacation - fantastic!

Ostripper, yes, the X-Altra Mini is very simple. The PCB is not that small though. Sounds good - I can vouch for that - LM4562 is really quite outstanding.
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Old 21st December 2010, 11:31 AM   #1677
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Originally Posted by Bonsai View Post
BTW I was in Malaga this year in August at the flamenco festival for a vacation - fantastic!
I am glad you enjoyed it, the south half of Spain has a very nice weather and better food dishes

Regards
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Old 21st December 2010, 07:40 PM   #1678
fotios is offline fotios  Greece
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Quote:
Originally Posted by Bonsai View Post
I need to get to grips with writing a display driver (in C). Lucky I can access some gurus at work to help me. I am a s/ware novice, but I'm heading in the right direction!
Hi Bonsai
For novices in programming of micros (like you or me ) there is a great tool:
FlowCode of Matrix Multimedia.
With this software, i obtained the development of the appropriate code for my Remote control unit, in just 4 months!
Fotios
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Old 21st December 2010, 09:01 PM   #1679
fotios is offline fotios  Greece
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Default Upgrade of remote control unit

Just before 2 days i completed the code of MCU by adding a "software address setup". I did as well some small corrections in "Delays" of interrupts. Now the unit is complete. Modes of operation:
1) Management of Latching or common relays for input selection, mute and power supply activation.
2) Up to 6 inputs or 5 + Monitor/Source for tape recorders.
3) Display indications are modified according to inputs.
4) Your Logo can be added for displaying in LCD during power-up.
5) Any programmable remote control handset can be used. Philips handsets are recognized directly.
6) Address decoding can be modified from 0 up to 31. It can also be Enabled or Disabled. All of them thru the use of switches mounted on the control board. That is the "software setup", no use of external hardware like jumpers. By default, address is set to 0 (TV) and is disabled.

It can also be used with "Lightspeed Attenuator", directly, without any modification.

offer from your friend Fotios. The hex file for the PIC16F887 mcu, is available to anyone who requests it for free!!!
If you have a programmer that supports this mcu (MPLAB ICD2-ICD3, PicKit etc.) simply contact with me at eal@dra.forthnet.gr. Write me your option for input indications and your logo. Ready programmed PIC16F887 are available under request (not for free, cost is about 15 euro included packing-postage-PayPal fees worldwide).
My webpage is under transfer to Freehostia (economic crisis = lack of money = free web hosting ), so you should be patient for 2 or 3 days to you can get again the schematics and PCB layouts.
Is anybody out there to organize a group buy for PCBs and parts?
Some pictures indicating additions:
Attached Images
File Type: jpg PRE CONTROL 1_WP.jpg (77.4 KB, 1341 views)
File Type: jpg your logo here.jpg (59.2 KB, 1074 views)
File Type: jpg address 0.jpg (61.0 KB, 915 views)
File Type: jpg address 16.jpg (58.8 KB, 63 views)
File Type: jpg address disabled.jpg (60.1 KB, 56 views)
File Type: jpg address enabled.jpg (61.1 KB, 46 views)
File Type: jpg PRE SCREEN 2.jpg (92.6 KB, 67 views)
File Type: jpg PRE SCREEN 3.jpg (92.8 KB, 65 views)
File Type: jpg PRE SCREEN 4.jpg (93.0 KB, 67 views)
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Old 22nd December 2010, 01:16 AM   #1680
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Quote:
Originally Posted by Bonsai View Post
Thanks regiregi22. Yes, I will write this one up as well. A good few months out though. I need to get to grips with writing a display driver (in C). Lucky I can access some gurus at work to help me. I am a s/ware novice, but I'm heading in the right direction! BTW I was in Malaga this year in August at the flamenco festival for a vacation - fantastic!

Ostripper, yes, the X-Altra Mini is very simple. The PCB is not that small though. Sounds good - I can vouch for that - LM4562 is really quite outstanding.
I can make it small.. I do my own layout/PCB's now.

OS
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