Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 9th June 2005, 09:46 PM   #31
diyAudio Member
 
demogorgon's Avatar
 
Join Date: Jul 2004
Location: Behind you.
Send a message via MSN to demogorgon
Metal, i can very clearly see you are in a whole other leauge than me.
may i ask what educational level you are on? i saw "computer eng." on the schematic, in which case the part on me not understanding squat of that asm file would be clarifyed.

It's still quite some time before i can title myself engineer of any kind.
I will however take some time to think about and study the info and material you have made available to me.

"I'l be back"

Meanwhile, could i reccomend you a litle something to ticle the laughter muscle?
I dont know if your pro or con j.w.bush, but it's fun non the less.
www.jibjab.com

thanks
-Marius
  Reply With Quote
Old 10th June 2005, 08:23 AM   #32
Mx is offline Mx  Yugoslavia
diyAudio Member
 
Join Date: Dec 2004
Location: Belgrade
Hi everyone, sorry for late posting, i didn't have much time last week (and will not next 3 weeks ).
Metal, what can I say, code looks really good, you did a great job! I looked at code quickly and everything seems to be just fine. In a moment i don't have installed PicBasic (good old Windows which crashes every two fu**ing months), so I easily got lost with all variables , and procedures in the notepad. The only thing that i don't like are the controls with tasters, but i think that this is for testing only.
There are two ways to make round, classic, turning knob controls. -First is digital with optocouplers (like in non optical pc mouse) which I made with old potentiometer and parts from pc mouse. It works very good, but only have 30 steps per one revolution. Offcourse, you can buy one but they are expensive and have max. about 50 steps which is quite bad. (but if I recall, TDA chips have about 30 steps?)
-On the other hand, if we go with PIC16F877 chip, we can use A/D input and link to traditional mono potentiometer which will give us plenty of steps, and good old volume knob feeling. Only problem here is if we make remote control, and if you move volume up or down on remote, the potentiometer stays there. We could use potentiometers with motors, but that's complete waist of money (then we don't need PIC).
Keep posting Metal.
Bye
  Reply With Quote
Old 10th June 2005, 08:48 AM   #33
kinser is offline kinser  Israel
diyAudio Member
 
kinser's Avatar
 
Join Date: Jan 2004
Location: R'aanana
Send a message via ICQ to kinser Send a message via MSN to kinser
Mx,

Why not just use a optical/rotary encoder, you could even make one with a pot,
like this one:
http://www.labyrinth.net.au/~steve/opto/

Feels like a pot, and if you usa a remote then you dont need a motor. because its optical!
All we need is someone 2 change some of the code so that we can use a rotary encoder, optical encoder and so on.. and no a push butten, like in the circuit, because i would like to make this circuit but with the optical/rotary encoder!
if someone can do that, meaning chnce the code.. for an encoder of some sort.. it would be great!

Kinser
  Reply With Quote
Old 10th June 2005, 08:57 AM   #34
kinser is offline kinser  Israel
diyAudio Member
 
kinser's Avatar
 
Join Date: Jan 2004
Location: R'aanana
Send a message via ICQ to kinser Send a message via MSN to kinser
demogorgon,

Forgot to add to my post..

I Loved The JibJab!!

Kinser
  Reply With Quote
Old 10th June 2005, 09:24 AM   #35
Mx is offline Mx  Yugoslavia
diyAudio Member
 
Join Date: Dec 2004
Location: Belgrade
Quote:
Originally posted by kinser
Mx,

Why not just use a optical/rotary encoder, you could even make one with a pot,
like this one:
http://www.labyrinth.net.au/~steve/opto/

Feels like a pot, and if you usa a remote then you dont need a motor. because its optical!
All we need is someone 2 change some of the code so that we can use a rotary encoder, optical encoder and so on.. and no a push butten, like in the circuit, because i would like to make this circuit but with the optical/rotary encoder!
if someone can do that, meaning chnce the code.. for an encoder of some sort.. it would be great!

Kinser
I built exactly the same encoder, that's the first option I was talking about. It works perfectly and the code for it are just two lines in Pic Basic so it isn't problem from programmer point of view, but resolution is small. I have only 30 steps with best mouse encoder I found. You really have to turn knob a lot so the feeling of precise potentiometer is lost, but for some applications it is pretty good solution.

And yes, JibJab is great!
Mx
  Reply With Quote
Old 10th June 2005, 05:30 PM   #36
diyAudio Member
 
metal's Avatar
 
Join Date: Jan 2004
Hello everybody

I see, regarding the rotary encoder, there are many many types on the market, and most are much expensive than three microswitches. Some of you as I see can make their own rotary switch. Here in jordan, a rotary switch will cost me 15 $.

I think non of you wants the rotary switch to step the volume 30 steps at once, do you, or have the scale degraded by 50steps for the sake of using a rotary switch.

Also there are many ways to deal with rotary switches that I will not mention here, cause my self, I am not going to use any. I have used switches so I can control the circuit by wireless means, rather than just buttons, or rotary encoders, cause pulling the controller's button inputs low serves the job, I mean using another wireless circiuit that can produce low and high outputs only, will be enough.

Also, bear in mind that I have used button command to be able to control the debounce delay and auto repeat speed. If you push the button once, the volume steps half decible, if you hold the button it will start stepping rapidly until you have the level you want.

I had a problem when I first wrote the code that I wanted to mention here, when I hold one of the volume buttons, the reading on the LCD, stays as it is, until I remove my finger, after I remove my finger, the LCD receives the new volume infomation, but this was certainly solved many weeks ago, so even if you hold the one of the volume buttons, the reading on the LCD changes accordingly, and I don't think there are any problems with the code it self.

BTW, Its not necessary to be an engineer to understand what I have done, as some people told me on the email. To be honest, in university, I studdied 8085 microproceesor in one subject only, and used assembly. Four subjects regarding computer architecture, then very huge sujects on networks and networking, that I really dislike, but in future, as I can see from the situations in jordan, the only job available is for networks lovers.

Before that I had dreams of using PICs seriously since I was 18, so I have read lots of books sice the fourth year in university, really lots of books to understand how to program microcontrollers in assembly and PICBasic Pro, I can say I have 2000 pages printed only for PICs, and just bear in mind guys, what I did in PICBasic Pro, can be done using assembly, and these days, I am thinking about quiting PICBasic Pro stuff, and return to assembly.

And last thing to say, being from jordan, doesn't mean I am fond of politics, ok, so all politicians can...

Now, I have finished my part, people we need a PCB design for this project, any volunteers.

Regards
  Reply With Quote
Old 11th June 2005, 12:02 AM   #37
diyAudio Member
 
demogorgon's Avatar
 
Join Date: Jul 2004
Location: Behind you.
Send a message via MSN to demogorgon
Metal:

Quote:
BTW, Its not necessary to be an engineer to understand what I have done
I'm certain one does not have to be. My problem is simply that I have just finished my second out of three year electronics-technician education, and so school dont put to much wheight on knowing anything more than the principle of how stuff works. logical enough.

I should stop whining now, and start reading.

Quote:
being from jordan, doesn't mean I am fond of politics
Never said Jordanians were, please, I meant no offence.
I just found the site and it's animations fun and somewhat appeling to my anti bush\usa\capitalism line of thought. At least the intent was good.

-Marius
  Reply With Quote
Old 13th June 2005, 05:01 PM   #38
diyAudio Member
 
metal's Avatar
 
Join Date: Jan 2004
Hello

Hey guys, isn't there any help for PCB design ??

Move your butts people, come on.

Thanks
  Reply With Quote
Old 14th June 2005, 10:01 AM   #39
hau is offline hau  Philippines
Account Disabled
 
Join Date: May 2005
Location: pampanga
Default pcb layout

hi guys

like i promised to Metal, here is the pcb layout of the pga2310. this is not final yet, so comment and inputs are highly appreciated to make the layout better. i made this using my ultiboard 2001.
most of the tracks are about 20mils and for the bigger one are about 40mils.
Attached Images
File Type: png pga2310.png (92.8 KB, 722 views)
  Reply With Quote
Old 14th June 2005, 01:32 PM   #40
diyAudio Member
 
metal's Avatar
 
Join Date: Jan 2004
Hello

Really nice work, but you better review the LCD connections, I recommend that you make the connections for the LCD using a connector, looks like the IDE cable connector but not as large. Thats makes your job easier, and more flexible, cuz some one may want to install the LCD on the left, while the PCB is on the right. Also good place for buttons, nice done man

Also on the right upper corner, where the 5 volt supply input you better add 10uF capacitor, and also on the PIC supply pins, add 1 uF capacitor.

Finally, all I can say, is thanks very much, I really appreciate your help.

When you finish your art work, please upload it as PDF file so I can directly etch mine.

Thanks alot
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Digitally controlled LED panel help... needtubes Everything Else 0 28th June 2007 01:53 AM
A digitally controlled volume control solution ybserge Chip Amps 2 4th January 2007 09:31 PM
Digitally controlled Baxandall? BoGoMiPz Solid State 21 19th February 2004 01:41 PM


New To Site? Need Help?

All times are GMT. The time now is 04:39 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2