Deer Killer Posted December 29, 2006 Share Posted December 29, 2006 If you need spare headunit, with mp3 playback, btw check this: http://search.ebay.com/86201AG66A or wait for 07's.. Link to comment Share on other sites More sharing options...
NutBucket Posted December 29, 2006 Share Posted December 29, 2006 Gotta give you credit for the prototype setup. Very well done. Link to comment Share on other sites More sharing options...
Andyjo Posted December 29, 2006 Author Share Posted December 29, 2006 70 bucks for one of these bad boys? man.. i don't feel bad about being rough with it anymore I mapped out the board, there's a 5V pin i can grab on the back side of the board right next to the traces that need to be cut.... Looks like there's some tiny soldering to be done.. but that's not that big of a deal, i also poped open the face, and chopped out the bumper for the 'sat' button, and found where to tap on the board to grab that signal. Overall it looks like it's going to be pretty easy to put in there... now.. i may be getting ahead of myself.. but maybe i'll make it turn off when you hit AM/CD/FM also.... oh yeah! i put it back together! and had zero extra screws!! that's like.. a first for me... hehh... As for waiting for the 07's.... where's the excitement in that? and it costs alot more.... but whatever, i'll keep yall' posted, and get lots of pics when i go through and install the circuit. time to put the radio back in the car... brr... it's cold out.... oh yeah, i got circuit working perfectly, both channels, etc... Link to comment Share on other sites More sharing options...
Andyjo Posted December 30, 2006 Author Share Posted December 30, 2006 the circuit will be about.. 1.35"x.75"... http://i121.photobucket.com/albums/o206/AgentBCOC/routed.jpg?t=1167457482 Link to comment Share on other sites More sharing options...
RyanE Posted December 31, 2006 Share Posted December 31, 2006 Have you checked out the Analog Devices SSM2404 solid state switches? http://www.analog.com/UploadedFiles/Data_Sheets/36658935ssm2404.pdf I'm not sure what you're using to switch the audio - I'm still messing with getting a flip-flop setup to use a push button to select inputs on the SSM2404. -Ryan Link to comment Share on other sites More sharing options...
RyanE Posted December 31, 2006 Share Posted December 31, 2006 Durr, you're using the 7474 to switch - I might have to swipe that to switch my SSM2404 Link to comment Share on other sites More sharing options...
Andyjo Posted January 2, 2007 Author Share Posted January 2, 2007 I'm using the sat button to control the flipflop, which controls the audio switch Link to comment Share on other sites More sharing options...
RyanE Posted January 2, 2007 Share Posted January 2, 2007 Yea, I figured that out after I looked at the PCB image for more than 2 seconds The switching chip I was going to use requires +12 volts and -12 volts, plus the flip flop's +5 volts. That's a mess. Back to the drawing board for me. Are you going to mass-produce that PCB? As far as getting an iPod hooked up to a switching device, I just pulled the USB/headphone jack box out of the front of an old Dell. It provides a line in jack to go to the switching circuitry and USB jacks that I've wired up with Radio Shack 7805 5 volt voltage regulator so I can charge the iPod as I drive. It also had a pretty black plastic shroud over its metal chassis. -Ryan Link to comment Share on other sites More sharing options...
Andyjo Posted January 2, 2007 Author Share Posted January 2, 2007 there's a +5V draw you can grab on the back side of the board right next to the FM traces, i'll post the pics of it later tonight =) 12v you can grab from the input to the radio... but personally, i like keeping everything at the same voltage. i'll get my schematic up in a while, as for the boards, i can have them make however many i want, shouldn't be too expensive at all. Link to comment Share on other sites More sharing options...
RyanE Posted January 2, 2007 Share Posted January 2, 2007 Sweet, I was just planning on using battery/alternator voltage and cleaning it up from there. Analog Devices makes a couple of DIP solid state switches, but their website is broke so no sample ordering for me today. I'll look for those schematics! Thanks, Ryan Link to comment Share on other sites More sharing options...
Andyjo Posted January 3, 2007 Author Share Posted January 3, 2007 Dragging power all the way from the battery!? here's my schematic http://legacygt.com/forums/vbpgimage.php?do=full&p=2528&d=1167788912 it's sort of hard to follow.. all the connections are green.. oops! but anyhow, the gist of it: +5v = +5V (duh) FM_L & FM_R = FM Signal AUX_L & AUX_R = AUX Signal SAT_I = Input to Sat Button (+5V) SAT_B = The Other side of the Sat Button, you may notice that this is tied to the CLK on the 7474 flipflip, and also a resistor that pulls it down to ground when the button isn't being pushed. GND = Ground (duh) L_OUT = Left Channel Out R_OUT = Right Channel Out Here's the Truth Table for the 7474 Flipflop: http://i121.photobucket.com/albums/o206/AgentBCOC/7474truth.jpg?t=1167789582 The Function's I'm using are encircled in red, the Q output is tied into the D input to replicate a toggle situation. The Qbar Output is then pulled over to the audio switches, and then they do their thing now.. technically you should only need to use one of these switches per unit... but i'm having an issue with the switches only being able to handle one channel at a time.. oh well, they're cheap enough As for stuff on the circuit boards, and the mysterious sat button, here are some pictures that might help out some of you guys. The back side of the selector button, and the bumper to chop out (I already did mine): http://i121.photobucket.com/albums/o206/AgentBCOC/chopbumper.jpg The Back side of the face-circuit board: http://i121.photobucket.com/albums/o206/AgentBCOC/buttonvias.jpg A little closer on the button circuitry: http://i121.photobucket.com/albums/o206/AgentBCOC/satvias.jpg And here's the back side of the main circuit board, with the FM Traces and Possible +5V draw marked out. *edit* that was not +5V, it was actually ground... my dad grabbed the wrong pin on the chip... d'oh! Alright.. it's time to make my circuit small, and cram it in the radio.. i'm getting sick of the same 6 cd's i have in there edit: got it all packaged up in E-tape, small like... it'll go in the car tomorrow after work! whoah! Link to comment Share on other sites More sharing options...
RyanE Posted January 3, 2007 Share Posted January 3, 2007 Dragging power all the way from the battery!? Naw, just using the +12 that powers the radio...normally car electronics clean up the 12-14 volts from the battery/alternator internally, so I always assume I have to put some type of voltage regulating circuitry in anything I connect to car power. You found the hookup for pulling 5 volts from the radio, however, where the power is already "clean". Rock and roll! -Ryan Link to comment Share on other sites More sharing options...
zcarmob Posted January 3, 2007 Share Posted January 3, 2007 Did you follow those traces from the sat switch and see were they lead too?? That would be interesting to see what is missing. Link to comment Share on other sites More sharing options...
Andyjo Posted January 4, 2007 Author Share Posted January 4, 2007 I followed the traces... they go everywhere... I also got it working tonight in the car. It seems like i may need to amplify the signal from the AUX side a little bit, in order to match up with the FM & CD outputs. There's also a thump when you change the channels... which is exactly why i went this route, to avoid that thump... I've got a few ideas of how to eliminate them... perhaps have the switch throw all of the switches open while the button is being pressed, and then jump onto the correct channel. Who knows... i guess we'll see when i get around to messing with it more. But all that matters now is that it works! woohoo!! I ran the aux cable up through the cigarette lighter areas, Forester Style, i'm working on making a mount for the ipod, to go on the right side of the radio unit right out of the silver trim piece Link to comment Share on other sites More sharing options...
Andyjo Posted January 7, 2007 Author Share Posted January 7, 2007 Alright... more pictures for those of you who would like to see where to cut and solder, etc... Note: All of the below will void your warranty on the radio.... if you have one.... First, you have to find the spot on the board, and cut those traces, here is 1 trace cut. http://i121.photobucket.com/albums/o206/AgentBCOC/cuttraces.jpg (for those of you who don't know how.. you take an exacto knife, you chop it in 2 places, and scrape the material between the cuts out.) Next, you can start dumping wires on the board... here are the first 2 audio cables http://i121.photobucket.com/albums/o206/AgentBCOC/1stwires.jpg Then.... some more... http://i121.photobucket.com/albums/o206/AgentBCOC/bothaudioandpower.jpg So, that's all of the stuff to be done on the main board, both of your audio signals are tap'd and your circuit has power. (TP601 is +5V, thank you subaru ) So next you can rip out your faceplate of the radio, and if you haven't already done it, chop out the bumper on the 'sat' button, take out all of the screws, bull the board off (you'll need to pull the volume knob off the stub) and then chop the bumper: http://i121.photobucket.com/albums/o206/AgentBCOC/chopbumper.jpg Alright, so you put the board back in, and you're ready to attack the switch circuit. First, make some jumper wires, and bridge these connections: http://i121.photobucket.com/albums/o206/AgentBCOC/switchjumpers.jpg (hard to see... but you can use your trusty multi meter to figure out where the signal is coming from... you have to do this, because you also have to chop the traces for the sat button, which also can be seen in the pic above.) Then, after you do the jumpers, you can throw in the switch wires from the aux circuit (i did both separate... because i forgot to do the jumpers at first... ) http://i121.photobucket.com/albums/o206/AgentBCOC/switchwires.jpg Now remember.. all of this circuitry stuff is TINY, and just stupid to solder... so you're going to need an iron with a very small tip, and you should also know how to solder before starting this project.... It's a multilayer board too, so you can really mess up stuff if you heat it for too long. If you want a better walk through.. well.. .maybe someday when i have time i'll write something up, with better pictures. Good luck! Link to comment Share on other sites More sharing options...
BMac1203 Posted January 8, 2007 Share Posted January 8, 2007 Any chance you're going to perform these on users' boards for a small fee? Need a CarPC bezel? PM me! Link to comment Share on other sites More sharing options...
Andyjo Posted January 8, 2007 Author Share Posted January 8, 2007 Any chance you're going to perform these on users' boards for a small fee? Well, maybe someday, first i want to get some boards made, so it's not just a glob of electrical tape floating around in there There also becomes a problem with liability, if for some reason it doesn't work, and the radio gets screwed. I believe mvignaeu had this problem with a customer's board, although he had a spare that he gave them. and third.. that stuff is tiny! and a pain to solder with my big clunky iron i mean.. we could work something out eventually, but i want to get things squared away before i commit to anything.... but good news! i just got ahold of the radio service manual, which happens to have a full schematic of the radio.... so i'm going to spend some time combing through it and try to figure out where exactly the sat or nav inputs go.... or better yet, an easier place to tap into .... but all will come with time oh yeah, there's also a big ol' thump when you hit the button... i'm working on fixing that problem right now... Link to comment Share on other sites More sharing options...
BMac1203 Posted January 8, 2007 Share Posted January 8, 2007 Well, if you were willing to do it with no liabilites (as in, I hold you accountable for nothing, just honesty and faith), you let me know. Need a CarPC bezel? PM me! Link to comment Share on other sites More sharing options...
Andyjo Posted January 8, 2007 Author Share Posted January 8, 2007 Alright, i'll let you know, i usually take a trip down the albany/schoharie area a few times per semester. When i figure out how to get rid of the speaker thumping i'll make the boards Link to comment Share on other sites More sharing options...
BMac1203 Posted January 8, 2007 Share Posted January 8, 2007 Sounds like a plan, I'm 10 mins from Albany. Need a CarPC bezel? PM me! Link to comment Share on other sites More sharing options...
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