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SanDisk User
Posts: 34
Registered: ‎04-30-2010

I want to build a dock for my car

Great forum - I can see that a lot of help is being given & civility rules (!).

I got my Fuze to use in my car, as a replacement for a 100 or so cassette tapes (yeah, I know "Cassette tapes!!").  I tried using an FM adapter that my wife has, but that sucked & I got a Griffin tape adapter that works very well.

The tape adapter connects through the headphone jack, but there's a couple of features that I'd like to have & I'm hoping that I can get them by using an LOD instead.  I've found & understand the diyLOD at http://www.anythingbutipod.com/forum/showthread.php?p=326983.

First, is charging - I assume that supplying +5v on pins 1,2/3,6 of the sync cable connector will do it.

Second - I'd like the Fuze to turn on when the +5 is applied (I'll build a 5v supply controlled by the radio, or ignition switch).  When I connect to my PC, it turns on automatically, so I assume that it's the presence of the +5 that does it.  I'll not connect to the USB signal pins, so the Fuze will play.

The third & most desirable feature that I want is probably not going to happen.  That is for the Fuze to turn off when the radio/car is turned off.  I'm prone to forget that it it's on & come back to find the battery run down & having missed a bunch of songs on the playlist.  I assume that removing the +5 won't do it, since disconnecting from the PC doesn't turn off the Fuze.  So, the big question is: is there some way to use the LOD to turn off the Fuze?  I.e., a signal to some other pin, or something?

Thanks,
Bob
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SanDisk Fanatic
Posts: 223
Registered: ‎12-03-2009

Re: I want to build a dock for my car

[ Edited ]
Message Edited by TomJensen on 05-03-2010 05:18 PM
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SanDisk User
Posts: 34
Registered: ‎04-30-2010

Re: I want to build a dock for my car

"If the Fuze turns on when juice is applied, then it should also auto-shutoff when juice is disconnected."

 

By "should", do you mean that's the way it was designed & if mine doesn't do it, then something is wrong?  Or do you mean theoretically it should?  BTW, my "Version" is V01.02.28A, according to Settings/System Settings/Info.  It definitely does not turn off when I disconnect it the PC USB sync cable.  Should it do that?  Or is it different when the USB signals aren't there?

 

 "The more important question is whether it's a good idea to leave it sitting in the car.  ..."

 

Not a problem, definitely.

 

 "Personally, I'd go simple and get a USB-lighter adapter ... and stick the Fuze into the cup holder. Not the prettiest setup, I admit."

 

I do agree with the  "Not the prettiest" part & it doesn't solve the turn-off problem, which is my highest priority.

 

Thanks,

Bob

 

BTW - here's a pic of the holder that I made for the car.  The headphone jack is molded into the bottom, so the connection is made just by slipping the Fuze into the holder.

 

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SanDisk User
Posts: 34
Registered: ‎04-30-2010

Re: I want to build a dock for my car

"So, the big question is: is there some way to use the LOD to turn off the Fuze?  I.e., a signal to some other pin, or something?"

 

Doing some more web searching, it doesn't look like there's any known pin in the sync cable connector that would directly do this.   That still leaves the possibility of indirect function (i.e., removal of 5v if no USB data pin was used).  Or, an as-yet-undefined pin.

 

Bob

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SanDisk Fanatic
Posts: 223
Registered: ‎12-03-2009

Re: I want to build a dock for my car

[ Edited ]
Message Edited by TomJensen on 05-03-2010 05:18 PM
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SanDisk User
Posts: 34
Registered: ‎04-30-2010

Re: I want to build a dock for my car

Mine shuts after some wait (about 5 min, I guess), IF it's paused.  But if I just disconnect the USB adapter, it continues to play ("forever").  Does yours turn off even if it isn't paused?

 

Thanks again,

Bob

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SanDisk Fanatic
Posts: 223
Registered: ‎12-03-2009

Re: I want to build a dock for my car

[ Edited ]
Message Edited by TomJensen on 05-03-2010 05:18 PM
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SanDisk User
Posts: 34
Registered: ‎04-30-2010

Re: I want to build a dock for my car

I found that both the Sansa Base Station and the Altec Lansing iM413 remotes can control some functions of the Fuze (on/off, volume, forward/reverse).  I agree with you that they likely use the USB data path to do it.  There is both hardware and protocol in place for syncing and it makes sense that the docks would use that for their control.  In which case, it's well outsuide the scope of what I could/would do in my car dock.

 

Too bad.  I guess that I'll just have to learn to pause the Fuze when I turn the car/radio off (pausing is so much easier to do than stopping with that absurdly hard to use slide switch.

 

Thanks for your help,

Bob

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SanDisk Fanatic
Posts: 363
Registered: ‎08-02-2008

Re: I want to build a dock for my car

Well, there is a way that should work, but it might be risky unless you have a player to sacrifice for testing! The Fuze and most modern day electronics will shutdown if there is a short on one of the power supply voltages. The Fuze DIY lineout cable uses pin22 as a 3volt feed to pin7 to enable the lineout function (Hey, that's my claim to fame here!). You could wire a tiny momentary pushbutton switch from pin7 or 22, through the switch and then to ground. Pushing the switch will ground out pin22 which will short the 3volt supply to ground. This should cause an instant shutdown of the player due to current sensing shutdown. I would not attempt this without testing as it could be death for the Fuze if wired wrong.
8GB Blue FUZE w/The Original DIY Lineout Cable and AT Button H-Phones Fitted To AT WM5 Headband:All Custom Built
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Newbie
Posts: 17
Registered: ‎05-19-2010

Re: I want to build a dock for my car

I have found the communications method between the dock and the Fuze, and it's not through the USB port.

So far I have programmed a PIC microcontroller to control all the same things that the Sansa dock can do, and 

as soon as I get some free time I'll go looking for additional commands (just for fun).

 

I'll be making a 12 volt to 5 volt supply next, with switching for the Fuze, so I can detect and respond when

the car gets shut off.  It's one of those "Oops" things..We want to turn the Fuze off AFTER the power is shut down.

But that means my little car-lod will need two power lines. One switched to tell me when the key has been turned off,

and the other to keep my circuit alive just a little longer.. long enough for the Fuze to power down, and THEN I'll send

the "Power" signal. At least I can make sure it's a good quiet power supply.

 

It's been a lot of fun so far. I wish I had more time to play with it.

I'll probably start a separate thread once I have it a little more complete.

 

LyleHaze