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

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Arduino based LDR volume and source selection controller
Arduino based LDR volume and source selection controller
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 27th September 2015, 08:12 AM   #21
wineds is offline wineds  Australia
diyAudio Member
 
Join Date: Apr 2006
Location: Melbourne
Looking good! Please keep provision for the optical encoder. Otherwise my wife can't use it.
  Reply With Quote
Old 27th September 2015, 12:59 PM   #22
jackinnj is offline jackinnj  United States
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Arduino based LDR volume and source selection controller
Instead of MOSFETs you can always use a diffamp as the current source. A part like the LT1990, INA154 (dual)

Silonex has an equation for fitting the response, or you can derive your own. In practice, you only need 3 points for a reasonable fit. You do have to measure, however, because the parts vary from piece to piece.
  Reply With Quote
Old 27th September 2015, 06:51 PM   #23
jps1964 is offline jps1964  Germany
diyAudio Member
 
Join Date: Sep 2013
Location: Eisingen
... the two first boards...

I will use the EA ASSEMBLY eDIP128B-6LWTP (touch, wake-up on I2C).
Attached Images
File Type: jpg LDR_TOP_SKETCHUP_1.jpg (336.5 KB, 1793 views)
  Reply With Quote
Old 27th September 2015, 07:41 PM   #24
Vincent77 is offline Vincent77  Europe
diyAudio Member
 
Vincent77's Avatar
 
Join Date: Jan 2011
Location: Bruxelles
Quote:
Originally Posted by jps1964 View Post
Hello Vincent,

Ive only one objection in your design: the use of the chinese display; it is not really long term availability and for some people really hard to purchase.

My idea is to modify your design by adding a LCD touchscreen display over the I2C interface (A4 and A5 pins from Arduino): one board with C, LDR, IOs interconnected with a 1mm ZIF connector, or other type, to a second board with supplies and LCD (the encoder is superfluous).

The candidate for this display would be from ELECTRONIC ASSEMBLY. Ive used successfully this type of LCD with touchscreen in military application, but sorry, Im not programmer!

They provide also OLED displays but in this case only over SPI.

ELECTRONIC ASSEMBLY - root LCD Module

Ok, you have to do some firmware modification to implement the LCD.

I know that a lot of people will then positivelly interested in a GB...

Regards,
Jean-Paul
Hello Jean-Paul,

The i2C 2004 LCD display is really easy to get and cheap - there are hundreds for sale on eBay or in Arduino-related online shops (LCD Display Blue 2004 (20x4) IIC, I2C, TWI )

But of course, any i2C display can be used, if you adapt the software.

You have a cool project going on, keep us updated!
  Reply With Quote
Old 27th September 2015, 07:50 PM   #25
Vincent77 is offline Vincent77  Europe
diyAudio Member
 
Vincent77's Avatar
 
Join Date: Jan 2011
Location: Bruxelles
Quote:
Originally Posted by wineds View Post
Could you possibly post photos of the input and power supply pcbs?
Hello,
I don't have photos of these pcbs because the ones I have are an earlier version - the ones published here have been modified/improved.

You can open the PCB file with Eagle to see exactly what it looks like and where each part should go!
  Reply With Quote
Old 28th September 2015, 01:24 AM   #26
wineds is offline wineds  Australia
diyAudio Member
 
Join Date: Apr 2006
Location: Melbourne
Quote:
Originally Posted by Vincent77 View Post
Hello,
I don't have photos of these pcbs because the ones I have are an earlier version - the ones published here have been modified/improved.

You can open the PCB file with Eagle to see exactly what it looks like and where each part should go!
Thanks Vincent! I downloaded Eagle.
  Reply With Quote
Old 28th September 2015, 09:23 AM   #27
Vincent77 is offline Vincent77  Europe
diyAudio Member
 
Vincent77's Avatar
 
Join Date: Jan 2011
Location: Bruxelles
Quote:
Originally Posted by wineds View Post
Thanks Vincent! I downloaded Eagle.
There is an even better way to see the PCBs: you go to 3D Gerber Viewer | Mayhew Labs and you drag and drop the GERBER files in the viewer there (extract them from the .ZIP first). Then you can see a 3D rendering of the board!
  Reply With Quote
Old 28th September 2015, 09:49 AM   #28
wineds is offline wineds  Australia
diyAudio Member
 
Join Date: Apr 2006
Location: Melbourne
Quote:
Originally Posted by Vincent77 View Post
There is an even better way to see the PCBs: you go to 3D Gerber Viewer | Mayhew Labs and you drag and drop the GERBER files in the viewer there (extract them from the .ZIP first). Then you can see a 3D rendering of the board!
Thanks Vincent. Looking over your design in more detail today this is a very generous contribution indeed to the DIY community! Excellent work!
  Reply With Quote
Old 28th September 2015, 03:13 PM   #29
jps1964 is offline jps1964  Germany
diyAudio Member
 
Join Date: Sep 2013
Location: Eisingen
... work in progress...

eDIP128B-6LWTP (with touchscreen); main power EMC filter and main power ON/OFF.

Fourth board in braining: RTC, elapsed time counter (super caps with charger), temperature sensor.

Missing something? I think about a current sensor? Anyone a schematics or tested circuit?
Attached Images
File Type: png LDR_3.png (794.6 KB, 1728 views)
  Reply With Quote
Old 28th September 2015, 08:52 PM   #30
jps1964 is offline jps1964  Germany
diyAudio Member
 
Join Date: Sep 2013
Location: Eisingen
... I forgot... 6 switched main power 115, 120, 230, 240VAC, with or without NTC...

Thats all for today...
Attached Images
File Type: png LDR_4.png (736.9 KB, 1642 views)
  Reply With Quote

Reply


Arduino based LDR volume and source selection controllerHide 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
Passive Preamp: Arduino based, remote control, Relay R2R, input selection maxw Analog Line Level 102 17th October 2017 08:05 AM
Another Modified PGA2311 kit with Arduino for volume control and input selection cjkpkg Analog Line Level 28 15th December 2015 09:21 AM
Source select and passive volume for microcontroller-based preamp? vputz Analog Line Level 3 21st July 2012 10:51 AM
LDR Based Input Selection udailey Analog Line Level 25 5th October 2011 10:03 PM
WTB: LDR-based volume control / pre jdubs Swap Meet 7 2nd December 2010 01:50 AM


New To Site? Need Help?

All times are GMT. The time now is 10:29 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki