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Old 23rd January 2011, 07:58 AM   #1
ialpha is offline ialpha  Australia
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Default Arduino controled HIFI Preamp

Hello everyone

I am new to the world of microcontrolers. I am working on a HIFI Pre AMP to run a power Amp I built few years ago. I got an Arduino Mega off ebay that came with a ks0108 128*64 GLCD screen. I want to create a menu to select different sources (CD DVD Radio etc) and use a rotary encoder to select items from the menu. I have found lots of sample code for doing this with a standard 20x2 LCD, but nothing for using my big GLCD. Can someone please point me in the right direction. Also I would like to create a volume level display and remote control. This is a sample of what I would like to do, only on bigger screen. http://www.youtube.com/watch?v=EZigza0sSOc

I have been thinking it would also be fun to create a spectrum analyzer on this display.

Thanks in advance for all your help
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Old 23rd January 2011, 10:32 AM   #2
alexcp is offline alexcp  United States
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diyaudio is not the best place to discuss Arduino, since you questions have nothing to do with audio. Go to Arduino: Forum, you should be able to find help there.
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Old 23rd January 2011, 10:50 AM   #3
Krisfr is offline Krisfr  United States
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Quote:
Originally Posted by alexcp View Post
diyaudio is not the best place to discuss Arduino, since you questions have nothing to do with audio. Go to Arduino: Forum, you should be able to find help there.
I could not disagree with you more!

Diyaudio needs to start a section to incorporate digital control of audio systems.

I just finished helping a friend to control his home theater system by using a logictec $250 controller. The Dennon Rec/controller switch was a pain, ALL digital controls and running everything from the TV to the cable box to the DVD blue ray etc. etc.

Digital is the future. Trust me.

I am currently working on a Arduino system to control power, track voltages and monitor temperature around the power amp system.
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Old 23rd January 2011, 12:06 PM   #4
ialpha is offline ialpha  Australia
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Quote:
Originally Posted by alexcp View Post
diyaudio is not the best place to discuss Arduino, since you questions have nothing to do with audio. Go to Arduino: Forum, you should be able to find help there.
Sorry if im out of place but, I posted this in the Arduino Forum first and got no reply so thought I would give this place ago since I always got such great advise here.
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Old 23rd January 2011, 12:30 PM   #5
jkeny is offline jkeny  Ireland
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You are not out of place at all & there is a member here who uses Arduino uCs all the time & has advanced his control of his DAC & preamp with them. Just ignore the people who have nothing better to do than crap on somebody's genuine inquiry - there seems to be a lot of these sorts haunting this forum.

The member you want to make contact with is glt & his forum is H I F I D U I N O . he has posted his code & I would bet that it does exactly what you want with maybe a tweak or two. Good luck with it & all we (most of us) would ask you to do is feed back your progress & findings to the DIYA community as this is how knowledge is advanced (for those that are interested in such)!
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Old 23rd January 2011, 01:16 PM   #6
alexcp is offline alexcp  United States
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Whoa, don't get emotional, guys, and please don't crap on my genuine attempt to help by providing relevant links.

ialpha wants to connect a graphic LCD to an Arduino. This task is not audio-specific, so I pointed to a direction where someone has already accomplished that. I agree with ialpha that members of Arduino Forum are less responsive then we are here at diyaudio, but they do have a lot of solutions and code posted. Specifically, my first search of "KS0108" gave me this announcement: Graphic LCD (KS0108) library now available, which led me to KS0108 Graphics LCD library. Reading the original post, it looks like it solves the problem. There are also some discussions about connecting GLCD specifically to Arduino Mega.

The HIFIDUINO has nothing about GLCDs, although there is a lot of audio-specific stuff like controlling Wolfson DACs, which I personally am very interested in. Thank you jkeny for sharing the link!

Last edited by alexcp; 23rd January 2011 at 01:35 PM.
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Old 23rd January 2011, 02:10 PM   #7
jkeny is offline jkeny  Ireland
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Sorry Alexcp, if I over-reacted to your directing ialpha away to the Arduino forum but I thought glt's code was relevant to him & he use a rotary encoder in his code & a screen. I also get a bit fed up with the stock response in this forum to notions/ideas that are in any way out of the mainstream/accepted norms (whatever they are) & it has maybe sensitised my antennae. In this case I was wrong, sorry!

Last edited by jkeny; 23rd January 2011 at 02:15 PM.
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Old 23rd January 2011, 02:24 PM   #8
alexcp is offline alexcp  United States
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check out this: ATmega8 Spectrum Analyzer and this: AVR acoustic spectrum analyzer. The original is in Polish (with English translation further down the page), the firmware is written in Basic, and - sorry - there is no graphic LCD, just the stock 16x2 - but it does work!
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Old 23rd January 2011, 02:55 PM   #9
maxw is offline maxw  United Kingdom
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ialpha, the arduino forums are not too helpful with vague descriptions of projects but if you have a very specific problem, like interfacing with particular hardware or coding they are excellent.

I'm definitely interested in your project so keep us updated as to how it goes! I'm working on something similar:
My Preamp Project: Arduino, I2C, relay selector+attenuator, tube stage
Just waiting to finish some case work at the moment.
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Old 23rd January 2011, 03:26 PM   #10
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I agree also, more microcontroller post's please! lets see some Arduino's controlling digital volume controller IC's, input switching, etc etc! more please!
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