Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Headphone Systems Everything to do with Headphones

My DIY BT5.0 headphone amplifier
My DIY BT5.0 headphone amplifier
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 6th August 2020, 06:44 PM   #51
iamwhoiam is offline iamwhoiam  United Kingdom
diyAudio Member
 
iamwhoiam's Avatar
 
Join Date: Jan 2005
Location: Manchester, England
Quote:
Originally Posted by chunyan0001 View Post
I love the battery level meter animated shown when power on.
Battery voltage meter - YouTube
Love this detail. You didn't have to do this, but you did

  Reply With Quote
Old 7th August 2020, 11:19 AM   #52
chunyan0001 is offline chunyan0001  Taiwan
diyAudio Member
 
Join Date: Mar 2003
Location: Taipei
You know me haha.

Just got battery auto learning machine yesterday.
Start learning 1.5A(25W) discharge cauve.

Full cycle learning will take 18 hours.

Click the image to open in full size.
  Reply With Quote
Old 7th August 2020, 02:45 PM   #53
chunyan0001 is offline chunyan0001  Taiwan
diyAudio Member
 
Join Date: Mar 2003
Location: Taipei
Change platform to run 25w constant power discharge test
Click the image to open in full size.
  Reply With Quote
Old 7th August 2020, 05:14 PM   #54
iamwhoiam is offline iamwhoiam  United Kingdom
diyAudio Member
 
iamwhoiam's Avatar
 
Join Date: Jan 2005
Location: Manchester, England
Is this conditioning the battery? I didn't realise batteries had to "learn" their current draws?
  Reply With Quote
Old 8th August 2020, 01:04 AM   #55
chunyan0001 is offline chunyan0001  Taiwan
diyAudio Member
 
Join Date: Mar 2003
Location: Taipei
All the Consumer product like smart phone / Notebook / Tablet
we use Multiple cell in Series together to creat high voltage (for lower operating current)
Lower current mean lower Power loss.

and Multiple cells in parallel together to creat high capacity

But because of the difference in battery internal resistance.
The battery protection / Gauge Ic need to Forecast discharge curve and Computing capacity

So we call this "Charge/discharge process" = "learning process"
And call the "Charge/discharge machine" = " Learning machine"

You can setup different discharge current and discharge the cell.
Then the Battery Gauge IC can record this curve in EEPROM

after learning process

It make Battery Gauge IC can Accurately predict battery capacity.

Last edited by chunyan0001; 8th August 2020 at 01:13 AM.
  Reply With Quote
Old 8th August 2020, 01:05 AM   #56
chunyan0001 is offline chunyan0001  Taiwan
diyAudio Member
 
Join Date: Mar 2003
Location: Taipei
10 hours discharge curve
Click the image to open in full size.
  Reply With Quote
Old 8th August 2020, 01:07 AM   #57
chunyan0001 is offline chunyan0001  Taiwan
diyAudio Member
 
Join Date: Mar 2003
Location: Taipei
It will run out of battery power after 4 hours
  Reply With Quote
Old 8th August 2020, 05:34 AM   #58
chunyan0001 is offline chunyan0001  Taiwan
diyAudio Member
 
Join Date: Mar 2003
Location: Taipei
Test completed
Got the 25W discharge curve

Now I can modify the battery level LED to fit this discharge curve

Click the image to open in full size.
  Reply With Quote
Old 8th August 2020, 06:23 AM   #59
jean-paul is offline jean-paul  Netherlands
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
Hi Murasame Yui, did you ever test the device without batteries so mains operated? How did it perform?
__________________
It's only audio. Member of the non modular PCB design committee
  Reply With Quote
Old 8th August 2020, 06:51 AM   #60
chunyan0001 is offline chunyan0001  Taiwan
diyAudio Member
 
Join Date: Mar 2003
Location: Taipei
I will do the test by use AP525 after aluminum case complete.

Also this amplifier can not be use without battery.
  Reply With Quote

Reply


My DIY BT5.0 headphone amplifierHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: The Wire headphone SE-SE headphone amplifier ulogin Swap Meet 67 11th September 2018 04:48 PM
FS: The Wire headphone SE-SE headphone amplifier ulogin Swap Meet 23 30th January 2018 09:01 PM
X5 headphone Amplifier Algar_emi Headphone Systems 10 18th December 2016 04:51 PM
C3g Headphone amplifier neskor Swap Meet 1 30th June 2014 03:18 PM
Headphone Impedance and headphone amplifier TheGimp Tubes / Valves 89 3rd May 2014 01:46 PM


New To Site? Need Help?

All times are GMT. The time now is 08:48 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki