Contest: Linear Power Amp in a mint tin (class Aa, class AB, or class B) - Page 15 - diyAudio
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 30th December 2012, 09:39 AM   #141
diyAudio Member
 
danielwritesbac's Avatar
 
Join Date: Nov 2007
Quote:
Originally Posted by bigwill View Post
Caught up with Christmas at the moment - I've also been off the site for a few of days as diyAudio is being reported as an 'attack site' by firefox. I've now given in and ignored the warning for now.
The warning was because of a couple of posted links, and although they have been deleted, it will take some time for the warnings to quit.

How goes it with the Class AB minty amp? I think the Class AaG guys are either talking or hibernating rather than doing, so your competition is a couple of chip amplifiers. I've had a redo on mine because I'd like to explore the "compact amplifier" category which has more options than my car chip.
__________________
Tools, Models & Software for DIYClipNipper boostLM1875 TurboPowerful TDA7293 kitTDA7294 pt2pt ♦ My post has opinion.
  Reply With Quote
Old 30th December 2012, 11:27 AM   #142
diyAudio Member
 
bobodioulasso's Avatar
 
Join Date: May 2008
It is a bug of Firefox 17.0.1.
Firefox 18 beta or Pale Moon (light Firefox) solves the issue.
  Reply With Quote
Old 30th December 2012, 02:50 PM   #143
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Can I use a screw terminal strip for in/out/pwr connections?
"Electronics" part is a piece of cake, but standard size jacks and plugs take way too much space or directly don't fit in.
Or at least a row of, say, .1" or .156" pitch plug in connectors on some edge?
Really don't know how to fit 2 in jacks, 2 out ones plus a Pwr connector in an Altoids or similar tin can.
Please consider that nobody has posted a finished example yet, I bet space and layout have a big influence on it.
Thanks.
  Reply With Quote
Old 30th December 2012, 03:23 PM   #144
diyAudio Member
 
danielwritesbac's Avatar
 
Join Date: Nov 2007
Quote:
Originally Posted by JMFahey View Post
Can I use a screw terminal strip for in/out/pwr connections? "Electronics" part is a piece of cake, but standard size jacks and plugs take way too much space or directly don't fit in. Or at least a row of, say, .1" or .156" pitch plug in connectors on some edge? Really don't know how to fit 2 in jacks, 2 out ones plus a Pwr connector in an Altoids or similar tin can. Please consider that nobody has posted a finished example yet, I bet space and layout have a big influence on it. Thanks.
Power connection:
You can hardwire power and so a little rubber grommet can protect the cord.
Or power can use a non-shorting jack, such as a barrel jack--power jack is an option but not a requirement.

Input jack:
An 1/8" stereo jack works for input in little space. Typical uses with television, computer or mp3 player all use 1/8" anyway.
It is also possible to use RCA jacks, but those are slightly more difficult to fit.

Speaker connectors:
These can be a mini 4 terminal spring clip or screw terminals or binding posts or RCA's, which are all non-shorting and available in a wide variety of sizes.

I hope these ideas were helpful.
__________________
Tools, Models & Software for DIYClipNipper boostLM1875 TurboPowerful TDA7293 kitTDA7294 pt2pt ♦ My post has opinion.
  Reply With Quote
Old 30th December 2012, 04:12 PM   #145
diyAudio Member
 
Kindhornman's Avatar
 
Join Date: Aug 2012
Location: Los Angeles, California
Very off the original contest here I have a question. Could someone take this same original premise and design one of these Altoids amplifiers to drive a set of headphones? I would want to use the output from say an Ipod and amplify it with a better amplifier. Could the power supply then be a second tin with rechargeable lithium or NiMh other battery and drive the circuit instead of an AC power supply?
  Reply With Quote
Old 30th December 2012, 04:45 PM   #146
diyAudio Member
 
bobodioulasso's Avatar
 
Join Date: May 2008
http://www.experimentalistsanonymous...0Amplifier.pdf
  Reply With Quote
Old 30th December 2012, 06:08 PM   #147
diyAudio Member
 
Kindhornman's Avatar
 
Join Date: Aug 2012
Location: Los Angeles, California
bobodioulasso,
Thanks for the link. Now I just have to figure out why my PDF viewer keeps crashing! But I did see the parts list on another site and just can't see the schematic yet. It looks like it would be a nice project. Thanks a lot. Anyone build one of these, and what other changes has anyone made to the circuit. I see they talk about oscillation problems with one of the opamps.
  Reply With Quote
Old 30th December 2012, 07:09 PM   #148
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Quote:
I hope these ideas were helpful.
Dear danielwritesbac, thanks, now I'll have to buy some canned mints or visit my neighbourhood Chinese dollar store. Stay tuned.

Dear Kindhornman: why carry 2 tins (plus the IPod)?
I'll build something like you are asking for, but all in one, as a 1>4 headphone extender/booster.
I hate it when somebody sees me enjoying something and can't share it.
I guess up to 4 headphones will solve that .
I'll post it here.
A couple 3.6V Lithium batteries will be best, but I have some unused 3.6V mini wireless phone battery packs, now they have a new task on Earth The whole shebang fits into a single mint Tin.
  Reply With Quote
Old 30th December 2012, 07:20 PM   #149
diyAudio Member
 
Kindhornman's Avatar
 
Join Date: Aug 2012
Location: Los Angeles, California
jmFahey,
I'll look forward to see what you propose. I told my daughter about the little tin amplifier and she jumped at the chance to build something like that. She wants to become an engineer so perhaps this will help her decide what type she may want to be. The one that bobodioulasso posted was running on a 9v battery.
  Reply With Quote
Old 30th December 2012, 07:26 PM   #150
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
OK.
It will be very simple and use 2 LM386, so it can run from 4.5V to 9V .
Even 12V since it won't drive speakers.
I congratulate you on your Daughter.
Mine dropped out of School and is "working" at Mc D. , go figure.
  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
Class-AB meets Class-D: Yamaha's EEEngine Topology - where are this Diy Projects? tiefbassuebertr Solid State 29 14th April 2014 04:12 PM
Cannibalize a Class AB Stereo to Class A Mono block. owenhamburg Solid State 8 13th September 2010 08:55 PM
Configuring an AB class amp to work in pure A class jrme Tubes / Valves 5 23rd February 2010 06:31 PM
Can a Class AB PP amp be said to be operating in Class A at low signal levels? ray_moth Tubes / Valves 19 23rd January 2009 07:52 PM
Help! 50w Class A or 150w Class AB debate Toobstheway Solid State 12 17th September 2007 07:05 PM


New To Site? Need Help?

All times are GMT. The time now is 07:49 AM.


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