Yet another Volume controlers and source selections - Page 8

Vikt0r · 17th January 2010, 07:26 PM

Okay, maybe that was five hours...

Thanks guys for such positive feedback, catch some more then...

This is the MCU board for PLCC atmega. This one took me some more, needed to spend half a day digging the datasheets. Now only the PSU PCB will remain.
Come back with updates soon.

Vikt0r · 18th January 2010, 08:20 AM

Danzup,
as far as I understand, you've used BASCOM-AVR for creating and compiling the code. What did you use for flashing the chip itself, I mean - which schematic and software? I am planning to build the simplest-ever-possible type of ISP programmer - appreciate your suggestions.

Pryanick · 18th January 2010, 08:44 AM

Vikt0r,
as for me I soldered very simple "USBasp - USB programmer for Atmel AVR controllers".
Original link:
fischl.de - USBasp - USB programmer for Atmel AVR controllers

BASCOM-AVR supports USBasp since version 1.11.9.6

Vikt0r · 18th January 2010, 09:00 AM

Thanks, Pryanick, but...
No problems to solder it together, but it still requires programming the Atmega8. Since I don't have anything yet - I need a simpler programmer at first. Maybe that would make sense to solder a USB one later.

jkraxi · 18th January 2010, 11:18 AM

@ Vikt0r

As far as I know he use this ...
http://www.qsl.net/zl1bpu/MICRO/ENV/AVRprog.gif

dobrivoje · 18th January 2010, 03:00 PM

Or use this one. Today I programmed my Mega16 without problems.

danzup · 18th January 2010, 03:41 PM

Quote:

Originally Posted by jkraxi

@ Vikt0r

As far as I know he use this ...
http://www.qsl.net/zl1bpu/MICRO/ENV/AVRprog.gif

Yes .
It is STK200/300 programmer header for parallel port .
In Bascom this must be set in the programmer adapter type .
Bascom AVR compiler you will find to download for free .
On the schematics I forgot to draw the signals for programming so you must use the following pins of Atmel :
Reset , Miso , Mosi , SCk , 5Vcc , Gnd .
Do not forgot to program only the fusebit : Internal RC 8Mhz oscillator.

Vikt0r · 09:49 PM

Wow,
thanks guys! One of these will definitely do for me, found an ALS244 already. Interesting founding that some different (and incompatible!) pinouts for the ISP exist. The Atmel appnote recommends a 6 pin header, while at many designs a 10-pin one can be found.Which one is more standard? Another question - would this all SW accessing the LPT port work under Win7? Has anyone tested it?
Oh... the WIP, if anyone's interested

Very draft yet, just finished soldering, didn't even wash the board.

dobrivoje · 19th January 2010, 10:23 PM

Today I connected boards and turned power on. Well, I have some problems.
First of all, I reversed A and K on LCD backlight, so it must be corrected (my post #55 in this thread).

Then, pushbutton for on/off can't turn off until backlight is on.

Third, and most important, is that only three of six relays for volume work. I checked resistor, transistor and relay chains, all six of them are working properly, I just don't get enough voltage from pins to open transistor.

I programmed chip with internal 8MHz clock, but I have delay between steps for volume aprox. 1 second, and for input select aprox. 2 seconds. Is it OK?

Tommorow I'll reprogramm chip and, if it still doesn't work properly, I have to try with another mega16. I used all precautions against static electricity, I just don't belive that I damaged it.

Vikt0r · 20th January 2010, 06:37 AM

Quote:

Originally Posted by dobrivoje

Then, pushbutton for on/off can't turn off until backlight is on.

That looks like a s/w bug, we need to ask danzup to correct it.

Quote:

Originally Posted by dobrivoje

I just don't get enough voltage from pins to open transistor.

What transistors did you use? Are you sure they're darlingtons?
What voltage do you use to power Atmega?

Quote:

Originally Posted by dobrivoje

I programmed chip with internal 8MHz clock, but I have delay between steps for volume aprox. 1 second, and for input select aprox. 2 seconds. Is it OK?

I'm not danzup, but I don't think it's okay, and I don't think it has anything to do with 8Mhz. Do you have a scope? Can you take a look at the unstable relay's transistor driver, what's going on there? And what's on atmega the pins...

Quote:

Originally Posted by dobrivoje

Tommorow I'll reprogramm chip and, if it still doesn't work properly, I have to try with another mega16. I used all precautions against static electricity, I just don't belive that I damaged it.

Don't worry too much, these chips do tolerate a lot.

One more thing: did you try the IR remote control? Does it work for you?

18th January 2010, 08:44 AM	#73
Pryanick diyAudio Member Join Date: Nov 2009 Location: Minsk	AVR prommer Vikt0r, as for me I soldered very simple "USBasp - USB programmer for Atmel AVR controllers". Original link: fischl.de - USBasp - USB programmer for Atmel AVR controllers BASCOM-AVR supports USBasp since version 1.11.9.6

18th January 2010, 11:18 AM	#75
jkraxi diyAudio Member Join Date: Dec 2004 Location: Bucharest	@ Vikt0r As far as I know he use this ... http://www.qsl.net/zl1bpu/MICRO/ENV/AVRprog.gif __________________ http://www.diyaudio.com/forums/group...ction-pcb.html

19th January 2010, 10:23 PM	#79
dobrivoje diyAudio Member Join Date: Aug 2009 Location: Smederevo, Serbia	It works...almost Today I connected boards and turned power on. Well, I have some problems. First of all, I reversed A and K on LCD backlight, so it must be corrected (my post #55 in this thread). Then, pushbutton for on/off can't turn off until backlight is on. Third, and most important, is that only three of six relays for volume work. I checked resistor, transistor and relay chains, all six of them are working properly, I just don't get enough voltage from pins to open transistor. I programmed chip with internal 8MHz clock, but I have delay between steps for volume aprox. 1 second, and for input select aprox. 2 seconds. Is it OK? Tommorow I'll reprogramm chip and, if it still doesn't work properly, I have to try with another mega16. I used all precautions against static electricity, I just don't belive that I damaged it.

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18th January 2010, 08:20 AM	#72
Vikt0r diyAudio Member Join Date: Jul 2005 Location: Uzhgorod, Ukraine	Danzup, as far as I understand, you've used BASCOM-AVR for creating and compiling the code. What did you use for flashing the chip itself, I mean - which schematic and software? I am planning to build the simplest-ever-possible type of ISP programmer - appreciate your suggestions.

18th January 2010, 09:00 AM	#74
Vikt0r diyAudio Member Join Date: Jul 2005 Location: Uzhgorod, Ukraine	Thanks, Pryanick, but... No problems to solder it together, but it still requires programming the Atmega8. Since I don't have anything yet - I need a simpler programmer at first. Maybe that would make sense to solder a USB one later.

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