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Old 12th September 2009, 11:13 AM   #1021
Dr_EM is offline Dr_EM  United Kingdom
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Amazing work MJL21193!!

I remember seeing the thread on it's construction but I must have lost track of it at some point. Great to see it finished so beautifully
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Old 12th September 2009, 11:48 AM   #1022
syn08 is offline syn08  Canada
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Default Controller

This is a fun project

Atmel based audio controller... Does everything, from power up/down sequencing, to supervising and displaying the heatsinks temperatures, power supplies, output offset, bar graph VUMeter, overload protection, clipping indicator, and allowing the YAP 2.1 amp to be remote controlled over an I2S link.

Now writing drivers for various devices, temperature is ready (Maxim DS18B20), display is ready, VUMeter is in the works... Will be single board and most likely Atmega1281 based. A few general purpose opamps for signal conditioning and tons of interrupt driven software. And including a bootloader to allow software upgrades over a serial link.
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Last edited by syn08; 12th September 2009 at 12:03 PM.
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Old 12th September 2009, 02:39 PM   #1023
Bonsai is offline Bonsai  Taiwan
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I also use a controller for housekeeping on my amp - really beats going analog. I do power on/off including in-rush current control, temperature, clipping and DC offset. I ended up using an NXP controller (89lpc922). I did everything in 'C' and ended up with about 1.5k of code. Good luck with your board.
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Old 16th September 2009, 04:33 PM   #1024
Krisfr is offline Krisfr  United States
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Quote:
Originally Posted by Bonsai View Post
I also use a controller for housekeeping on my amp - really beats going analog. I do power on/off including in-rush current control, temperature, clipping and DC offset. I ended up using an NXP controller (89lpc922). I did everything in 'C' and ended up with about 1.5k of code. Good luck with your board.
Would you share some of what you did to get to this, I would and I am certain others would be keen to see what you have done in this direction of Control, THANKS for the thoughts.....
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Old 16th September 2009, 09:35 PM   #1025
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This is my Symasym, with better parts, sounds wonderful,
as you can see in youtube

http://www.youtube.com/watch?v=XFbsolcxf0E
http://www.youtube.com/watch?v=IKOhm...e=channel_page

best regards

hcbonfim
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Old 17th September 2009, 09:40 AM   #1026
400 is offline 400  Germany
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Hi,

after a long time I will try it again posting pictures of my F5-clone.
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Old 17th September 2009, 10:08 AM   #1027
osscar is online now osscar  Latvia
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Your F5 amplifier looks great! I also started thinking about the construction of F5
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Old 17th September 2009, 06:53 PM   #1028
fotios is offline fotios  Greece
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Quote:
Originally Posted by 400 View Post
Hi,

after a long time I will try it again posting pictures of my F5-clone.
Bravo 400 for your effort. It is obvious that all the machining work of the amplifier case has been made by your hands in home. The front panel especially it looks great. It must you have spent enough time for the sanding work. The cutting of the decorative line (very nice) in the middle of panel, must be done with milling machine.
In fact, such type projects which are REAL DIY PROJECTS made by hands, few home tools and many labour, they express the ingenuity, the inventiveness, the craftsmanship and the artistic view of the REAL DIYer .
Please, give a warm applause in 400!

Fotios
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Old 18th September 2009, 07:43 PM   #1029
400 is offline 400  Germany
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Thanks Fotios.
Yes, the line in the middle I have done with a small milling machine.
The aluminium sheets I have cutted with a buzz saw.
Sanding by hand with wet abrasive paper (it takes some time...)
Lot of work, but it is great to do the vast bulk of the amp myself!

Thanks to all showing their projects here. I have got much ideas and stimulations from here.
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Old 19th September 2009, 03:22 PM   #1030
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Default My headphone amp

32 Ohms Headphone Amp. Class-A and double regulated power supply.
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