How to build the ultimate car computer/GPS system!


UPDATE!
Check out my NEW AND UPDATED GPS/MP3 page!!!


Introduction:

Now, if you have $5000 to spare, you could go down to Bob's Car Audio & Security and have this done for you... but not all of us have that to spend. Of course, if you go through with this you've still got too much time and money on your hands.. like me :). For around $1800 you can have a kick ass TV/VCR/GPS/MP3 Carputer!!!

What you need:

Item$$$Where To Get
9' TV/VCR$300WalMart
AM/FM/CD Player w/inputs (RCA or 1/4" jacks) & 200 watt car amplifier kit$250 (installed)Best Buy/Circuit City
Delorme GPS package (Earthmate GPS receiver & Street Atlas 7.0)$160Best Buy, www.delorme.com
400Mhz Laptop with TV & Audio outputs$999www.winbook.com
150 Watt Inverter$40Murrays (Any auto parts store)
PS/2 Touchpad$20Best Buy
15' Video (RCA) cable$10Best Buy/Radio Shack
10' DB9 Serial Ext. Cable$10Best Buy/Radio Shack
10' PS/2 Ext. Cable$10Best Buy/Radio Shack

Now, this list is not static. The particular equipment you choose can vary. For example, if you can't fit a 9' TV/VCR anywhere in viewing area, you can get a (more expensive) drop-down roof mounted LCD display. And if you already have a CD-Player with inputs your ready to go! Also, the Delorme GPS package is pretty expensive. They do have others, but I really like Street Atlas, and I've used DeLorme's products before with no complaints. The laptop can vary to wide extremes. In my car I don't have a 400MHZ Winbook, I've got a 200MHZ AST Ascentia 280M with a cracked display. Got it for $300... however, it doesn't have a TV-out. So I got a VGA-TV out (NTSC) converter from Antec (www.antec-inc.com) the Antec TVator Exec ($100). Also, if you don't want/need the ability to play MP3s, it doesn't need audio. The touchpad is for input to the laptop. Now, I'm a Linux advocate (of course), but I can't find any GPS software that runs under X. So with Win95/Win98 all you really need is a pointing device. Of course, you can get a small keyboard instead... but that's kind of dangerous in a driving situation. The cables and their lengths you need to really determine for yourself. It really depends on how big your car/van/limo/aircraft/spaceship/pimpmobile is. Obviously a 1970 Cadillac is longer than a '85 Ford Escort. And the touchpad/GPS receiver you choose may have longer or shorter cables already attached. So determines your needs... before you buy...

Pre-Install:

It'll take different people different lengths of time to get this whole setup going. If you have experience installing car audio systems, then a day is more than sufficient to get everything installed. If you have no experience taking a car's interior apart, but hack all day long, you should be able to figure it out rather quickly (just remember where all the screws went!). However, if you have experience with neither... than you had better have massive ambitions :).

As for the laptop, before you install it you want to make sure it's fully loaded with everything you want! Otherwise it's kind of hard to install new software via the trunk :). Actually it's not that bad as long as it's on CD or something. After this is all done you can just pop in the CD and load it like normal (except you'll be in front of the TV!). The first thing you want to do is load the GPS/mapping software. I've used the Earthmate GPS/Street Atlas Bundle from DeLorme. You should be able to use any package you want (as long as you've had experience with it), but I'll be referring to DeLorme's package from here on. When you load DeLorme's package, it has 2 CDs, an install, and a program. If you want to have a complete GPS system, I recommend you do a FULL INSTALL. If you start picking and choosing in DeLorme's package, you will wind up with a VERY LONG INSTALL process (hours!). If you just load everything, it doesn't take that long... especially if you get a 400MHX laptop with something like a 20x CD-ROM drive. After you load the package, make sure you've got the battery charged (or connected to a power source), the GPS connected, the computer rebooted, and are outside. The first time you run Street Atlas, the GPS receiver will download a virtual map of the GPS satellites in orbit. This takes something like 15-20 minutes of consecutive use. In any case, you have an additional choice here. You can run it off the CD, or you can copy the CD to your hard drive to vastly improve performance. I recommend you copy the entire CD to your root directory of your hard drive (i.e. c:\). Don't make any subdirectories to put it in, or else it won't work. There is only one file, and a few folders, so you won't have a cluttered root directory in terms of files. This will allow you to free up your CD-ROM drive for other purposes (like MP3s :) ). OK. If you have done this, then when you launch Street Atlas, it will say that it can't find the CD. It's then going to ask you if you want to find it on another CD-ROM drive. Say yes. Now, don't be scared by that. It's not going to force you to choose just a CD-ROM drive... you can still choose C:\. So go ahead and do so. After you do this (BTW, make sure the CD-ROM isn't in the drive anymore!!!) Street Atlas 7.0 will start. If you've never used Street Atlas before, don't be afraid, it's pretty easy to use, and also very powerful. Go up and click on GPS on the header bar. Then click on 'initialize'. It will try and find the GPS on the serial port (again, make sure it's connected before you do this!). At the bottom of this window thats popped up is something that says 're-connect on a 3-D fix', make sure this box is checked!!! In the mean time, Street Atlas should have found you GPS (make sure it's got batteries!!!) and is trying to get a fix from the GPS satellites. This may take 10-15 minutes the first time you run it! So be patient. When it's finally done, the box will disappear after a moment, and you should see a green dot on your map. That's you! It should be an exact map of your neighborhood. Pretty neat, huh? If you want to zoom in or out, you can do so freely by using the little icons of the earth with an arrow going up (zoom out) or in (zoom in). Remember to let it run for 15-20 minutes the first time! Now what I've done is placed Street Atlas in my startup so that as soon as the computer is done booting up, it will start Street Atlas. Now that's fine, but I also want to initialize the GPS automatically too! No problem! In the GPS preferences, there is an option to automatically start the GPS when Street Altas starts. So... after you start the computer, it will boot up (hopefully :) ), Street Atlas will start, it will initialize the GPS receiver, and a little green dot should appear on a map that is exactly where you're at! Gotta love it...

Next is the MP3 stuff (if you so desire). I recommend the versatile WinAmp shareware program. It not only plays MP3s, but also MOD/ITs, and nearly any other form of audio file. That shouldn't take more than 5 minutes to install. The longest portion is to copy all your MP3s onto your hard drive! If you're like me, then you've converted your entire CD collection to MP3, and burned it onto CD-Rs. So if you run out of space on your hard drive, you just pop in a CD for 650MB of more songs...

Finally, you need to get the external video working. Your laptop should have an option to enable the TV-Video out upon booting. If not, you may have problems. If it's in the middle of winter, you don't want to be in the trunk fiddling with the laptop to get the video on the TV! If your laptop doesn't support this, you may want to look at a VGA-TV converter. Again, I recommend the TVAtor Exec from Antec Inc. You just run the included VGA cable to your laptop and hook up the RCA cable going to the TV. The only problem with is some laptops require an external VGA monitor connected for this to work. Well, I've come up with a work-around for this. On the TVAtor you've got VGA-IN and VGA-OUT (pass-through) connectors. On the VGA-OUT connector, simply run a wire from pin 5 to pin 11. What this does is it fools your laptop into thinking that it has an external monitor connected, and now you can have your video on your TV as soon as it starts! This is the way I have it (because my LCD is cracked, too :) ). The easiest way (and safest) to do this is to go to radio shack and get an open VGA connector kit and make a dummy dongle, with just a connection from 5 to 11.

If you've got all this stuff together, then you're ready to roll!!!

Install:

CD-Player/Amp Kit:

Existing in-dash CD-Player with inputs & amp kit installed w/amp...
If you already have a hopped up audio system with an amplifier installed, all you need to do is buy a stereo cable to run from your inputs (on the CD player) to the trunk (laptop). Depending on your CD player & laptop, you may need an RCA cable, a stereo 1/4" jack, or some cross. Radio Shack has all this stuff...

Existing in-dash CD-Player with inputs & amp kit installed w/o amp:
If you already have an in-dash cd-player with inputs and an amp kit installed, then you can use the RCA cables included with the amp kit as your audio connection from the laptop (in the trunk) to your CD player (in the dash). If necessary, disconnect the RCA cables from your CD players outputs and connect them to your CD players inputs. You may need an RCA to 1/4" stereo cable converter.

Existing in-dash CD-Player with inputs & no amp kit:
If you already have an in-dash cd-player with inputs but no amp kit, you just need to install an amp kit. An amp kit consists of a long thick +12V cable, a shorter ground cable, and a stereo RCA cable (with remote wire). The RCA cables get connected to your CD players inputs. You may need an RCA to 1/4" stereo cable converter. Run this back to your trunk. The thick +!2V cable (usually red, or clear with a red stripe) connects to the positive terminal on your battery. Yep. That means you have to run this through your firewall. Depending on your car, this can be kind of a pain in the ass. That's why I recommend the CD player & amp kit be installed professionally. But if you choose to do this yourself, take your time. A bad job can result in a fire later on down the road! Run this the entire length of the car all the way back into the trunk. The ground cable just needs to be connected to something metal (i.e. the car's chasse) in the trunk. This can be the trunk mounts, the trunk lock mount (bottom half...), or an existing pin switch (for an alarm system). This wire does NOT need to go to the car's battery... just mounted to something metal. If you've got a metal trunk, you can just screw it down in the trunk itself. However, if you choose to do this be careful! Make sure you don't screw down into the gas tank, or puncture a wheel!

No CD player (or CD player without inputs) & no amp kit:
If you have a CD player currently installed without inputs and want the ability to play MP3s/Sound from your laptop, you have to replace your existing CD player with another that has inputs (I had to do this). If you don't have any CD player then you need to get one if you want to have audio from this system!!! At the same time, you need to install the amp kit. Instructions for installing the amp kit can be gotten from the previous section (CD player w/inputs & no amp kit).

TV/VCR:

The TV/VCR you purchase must have inputs & outputs for a really kick ass system. This way, you can display the video from your laptop on the TV, as well as play the audio output from from your TV/VCR in your car's speakers! This part of the installation can very, depending on the TV/VCR you choose. If you don't want or need a VCR, you can just get a good portable color TV. But at the minimum it needs a video input for the video output from your laptop. In my car ('97 Monte Carlo) I have taken out the ash tray and shoved the TV/VCR between the car seats and the dash. You may not have a whole lot of room (or if you have a rear wheel driver car, you may have a big hump there!!!). You may need a smaller TV (which I don't advise if you're displaying VGA output on) or a drop-down ceiling mounted LCD display (which costs an arm and a leg). You will have to take a good look at your vehicle and determine what you can do. As for receiving TV stations, you either hook up a short antenna to it and place it along your dash, or you can go all out and get one of those neat boomerang antennas and mount it on your trunk. I don't use it for TV much, so the antenna that came with my TV is good enough. If the TVs got audio outputs and you want to hook it up through your car audio system, you will need a Y cable to hook up both your TV/VCR's audio outputs and your laptop's audio output to your CD player. Again, evaluate your wants/needs!

Inverter

You may be wondering "Why do I need an inverter???" Simple, unless you can get a 12VDC adapter for your laptop cheap, an inverter is the best way to automatically re-charge the laptop. And if you have an old laptop and can't find batteries for it anymore, then you may not need them with an inverter!

In any case, a 150- or 300-watt inverter usually has a DC adapter that plugs into your cigarette adapter. What we want to do is to run the Inverter off of the amp-kit wires. This way, you've got solid +12V and ground connections. There are two ways to connected it. The first involved lobbing off the DC cigarette adapter and splicing the wires. This is the easiest. Or, you can get a new 12V jack from Murrays (or other auto parts store) and splice that to the amp kit. This makes it easier if you ever want to 'borrow' the inverter for a different vehicle. After you've done this, you're inverter is ready! Now, a good inverter has over-load circuit detection on it, and some even have built in circuit breakers. Make sure yours is good! The inverter will be used to plug the laptop into, as well as a VGA-TV converter (if you need it).

Just to be safe, test the inverter with a small lamp or something! Otherwise you may break something you don't want, and can't afford, to!!!

GPS Receiver

GPS receivers aren't made to for use indoors. And this includes cars too. So you're going to have to play with it to determine the best position in your car. I've found that the only place I can run it is on my front dash board, where it has the entire front window to see through. I couldn't get it to work reliably in me rear window. This kind of sucks because you have to run a long serial extension cable all the way from the dash to the trunk. But what the hell, you want it right!?!?! :)

If you're lucky enough, you may be able to use it in your rear window. Then all you have to do is run the wires behind the seat, and you may not need a serial extension cable. However, more likely than not, you'll need to run the wires from front to back. Now, if you've never done this, it may appear a daunting task. But it's not all that bad. If you open the door to your vehicle and look down, you should see the plastic (or metal, depending upon your vehicle) door sills. These have 4-5 screws in them. If you take these screws out, and lift the door sill, you'll see that there is a nice little channel that you can run wires! Make good use of this. It's the safest way to do it.

Touch Pad

Along with the GPS receiver, you'll probably want this somewhere in the front of the car. In my car (as well most others) you've got a nice little armrest that opens up for storage. Well, this is a nice little place for your touchpad too!!! That way you won't have it all bobbing about, getting in your way when you're driving (read: dangerous!). What I did was drill a hole in the bottom of the armrest/console in the back of it to let the wire through. Of course, as with the GPS, you're going to have to run another wire (the PS/2 extension cable) from the touch pad to the trunk. It's generally a good idea to run these wires together to make it nice and neat. They should all fit in the door sill.

RCA Video Wire

This should run from the TV Video Input to the trunk. If you can, run it along with the GPS serial extension wire and Touch Pad PS/2 extension wire. If you've had any experience installing CD players and amplifiers, then you should be pretty good at hiding wires. Just use the same rules here!

Laptop

The last step in installing your kick as system is your laptop! First, connected the power adapter to the inverter (make sure it's all turned off!!!). Then connect the external video RCA cable to it. If you're using the VGA-TV converter, hook that up to the inverter too, and attach the VGA cable to your laptop's VGA out and the VGA-TV converter's VGA in, and connect the RCA cable to the TV out of the VGA-TV converter. Connect the touchpad to the PS/2 port. Connect the GPS receiver to the serial port. Finally, connect the audio. Your laptop most likely comes equipped with a 1/4" stereo jack, so you're going to need a cabling converter from that to your RCA jacks that hookup to your CD player (if you're going to have audio hooked up).

If all is done right, you should be done installing!!!

Post-Install:

OK. You've got all this stuff hooked up. Now what!?!? Let's see if it works!

Turn on the inverter, the laptop, VGA-TV converter (if necessary), and the TV/VCR. Make sure the TV is turned to channel 'AUX' or 'INPUT', which is the input. You should see your laptop booting up on the TV! If not, there may be a special key sequence you need to press on your laptop to get it to switch to the external monitor. Try that. If you've placed Street Atlas in your startup, then it should come up automatically and start the GPS! Pretty cool...

A note about car power systems. I'm having problems when I start my car and all the equipment is already on. Usually, the inverter will shut off due to overload. This means I have to get out, go back in the trunk, and turn the inverter (and the VGA-TV converter, too!) back on. So make sure you start the car before you turn everything on!

Enjoy!!!

joe@joethielen.com
www.joethielen.com
Last Modified 11/07/1999