hacking the Sony control-A1/A1-2 bus for fun projects - diyAudio
Go Back   Home > Forums > General Interest > Everything Else
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

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
Thread Tools Search this Thread
Old 27th June 2005, 08:03 AM   #1
knutinh is offline knutinh  Norway
diyAudio Member
Join Date: May 2004
Location: lillestrÝm
Default hacking the Sony control-A1/A1-2 bus for fun projects

I've been toying with a project for controling my Sony amplifier, str-db940 using its control A1 bus.

My application is controling a single function (mute) using acoustic hand-claps (think bachelor appartement)

I have found some information googling, and have built a simple printer-port interface using just a transistor and resistor, described at the pages here:


Then, as I wanted windows XP support, I hacked a parallel-port driver found here:


It is timing the ups and downs of the serial waveform, taking an integer message value as input.

I have verifyed the waveform on oscilloscope, and I have managed to power on/off my amplifier. I take this as indication that the basic setup works. However, I have not managed to control any other functions. Part of the problem is that I do not now the device ID or function mapping for my particular amplifier. Internet sources are not that specific.

I have tried exhaustive search (by looping through the entire command space as well as 5- and 8-bit device ID space). Perhaps my amp use an even larger device ID. I am considering logging IR commandos from my remote control, as these messages are just IR commands with a pre-fix.

So.... Anyone think this sounds interesting? Any input would be appriciated. Perhaps any tinkerers out there that might want to join me?

best regards
Knut Inge

(I am running code in MATLAB, but the driver is accessible from the windows command-line. contact me for the source code)
  Reply With Quote


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
Sony hacking-project: MD to Copmactflash Wilma Digital Source 1 22nd March 2008 12:42 PM
hacking a sony tae9000es processor for digital out Mark Hathaway Digital Source 1 6th September 2003 04:30 PM
Sony cdp - 297 Remute Control datanasov Parts 0 29th October 2002 09:18 AM
Hacking Sony DVP-NC650V (cousin of NS500V), need help/schematics! Leo V Digital Source 14 5th October 2002 03:56 PM

New To Site? Need Help?

All times are GMT. The time now is 08:32 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2