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Resistance values

By mjruotolo · Sep 19, 2012in Hacks/Mods💬 4 posts👁️ 2,402 views
Posted Sep 19, 2012 · 14:34 UTC#1

I am working with an arduino to make interface for my steering wheel control for my avic-z140 I am aware the make the awsc units but it will not do what i exactly want. I have found this link but doesnt seem to have all the option that the avic-z140 can do via remote. Example the Voice activate.

http://www.jvde.net/...ired_remote.htm

 

Can anyone shed some light? I need to know the Resistance valve to activate the voice active.

Does anyone have the services manual for the avic-z140bh?

Thanks

Mike

Posted Sep 19, 2012 · 18:27 UTC#2

http://www.elektrot...c-f930bt_sm.pdf

 

I have x930bt, and service manual is probably the same in terms of the wired remote functionality.

Looking at wiring diagrams, looks like these lines basically go into u-com controller chip for determination of which signal.

 

I did see in the testing section there is a special test for each key of wired remote - seems like these must be possible. Sounds like a little bit of experimentation will be needed.

A few resistors, a breadboard, and test mode for wired remote, you should be able to figure it out.

please do share results here .... ;)

 

Key Allocation

 

SOURCE

0x00010002

ATT

0x00010003

UP

0x00010004

DOWN

0x00010005

LEFT

0x00010006

RIGHT

0x00010007

VOL UP

0x00010008

VOL DOWN

0x00010009

BAND

0x0001000A

PHONE

0x0001000B

ON HOOK

0x0001000C

OFF HOOK

0x0001000D

SAT TEXT

0x0001000E

Audio Recognition

0x0001001A

Edited Sep 19, 2012 by pionara
Posted Dec 18, 2012 · 18:18 UTC#3

Volume Up: 16K Ohms

Volume Down: 24K Ohms

Mute: 3.5K Ohms

Track Up: 8K Ohms

Track Down: 11.25K Ohms

Source: 1.2K Ohms

Band: 62.75K Ohms

 

The following buttons show this value between the sleeve and tip as well as the ring and the tip.

 

 

Preset Up: 8K Ohms

Preset Down: 11.25K Ohms

Phone Menu: 2.10K Ohms

Answer: 4.21K Ohms

Hang up: 4.92K Ohms

Voice: 42.4K Ohms

Posted Jan 02, 2013 · 05:08 UTC#4

Volume Up: 16K Ohms

Volume Down: 24K Ohms

Mute: 3.5K Ohms

Track Up: 8K Ohms

Track Down: 11.25K Ohms

Source: 1.2K Ohms

Band: 62.75K Ohms

 

The following buttons show this value between the sleeve and tip as well as the ring and the tip.

 

 

Preset Up: 8K Ohms

Preset Down: 11.25K Ohms

Phone Menu: 2.10K Ohms

Answer: 4.21K Ohms

Hang up: 4.92K Ohms

Voice: 42.4K Ohms

 

You are the best thanks so much