View RSS Feed

How To Videos

  1. Plan and test your in-vehicle computer installation on the bench

    by , 10-15-2009 at 11:15 AM
    Testing is one of the most important steps in putting a computer in your vehicle or car and is often skipped. We highly recommend testing your system on the bench for a day or two before you put the device in your car. We previously did a video on how to build your own car computer. This video will give you some insights into this next step.

    Updated 10-15-2009 at 02:01 PM by Heather

    How To Videos
  2. IPhone Car Navigation - The Death of your PND

    by , 04-14-2009 at 10:32 AM

    Here is the transcript to those two videos:

    Hi. My nameís Rob Wray from MP3 Car. Weíre doing this video blog today to give you some news. The PND, the Personal Navigation Device, itís dying. Itís dying fast. I mean Garmin, Tom-Tom, Dash Ė say your final prayers. Even our beloved car computer has numbered days.

    Whatís killing them? A deadly virus? No. Itís an infestation. An infestation of millions of cheap globally-available connected devices. Never heard of such a device? Well, I bet you have. You have one in your pocket. This device, your mobile phone, combined with new hardware and software innovations, are allowing you to connect your mobile phone to your car and kill your Tom-Tom. Letís go take a look.

    So Iím sitting in a standard Toyota Scion. This happens to be a fancy aftermarket car stereo, but this could just as easily have been your standard display that came with your Prius or Range Rover or other luxury car. It also could have been a host of aftermarket radios and displays that have built-in video inputs.

    Alright, so now that weíre in the car, letís go through the process. Youíve got a couple steps here, some of which are already done. You take the video cable that you get from the Apple store and you plug that into the video input in the back of your screen. Again, this can happen in any car with a screen. You can go out and get an accessory adapter that takes this video input. So get the cable, plug it into your iPhone. Hack your iPhone which is about a thirty-minute process. Thereís tons of websites that explain how you do it, and lots of developers have gotten together and made nice apps that make it really easy to do this

    So hack your iPhone. Then you want to install an apps called Screen Splitter, which Iíll link below. Install Screen Splitter. That allows you to duplicate the content of this screen onto this screen. And then you install the app of your choice.

    Weíre going to do our drive test now with a little app called X-GPS. So both of these apps are in their infancy. They have a few flaws, but theyíre really great in showing off this concept of why your Tom-Tom is going to die.

    Letís go for a drive. Iím going to run my Screen Splitter application. So now Iím sharing the video from my iPhone down to the car. Iím going to go ahead and run this little app here called X-GPS. Itís going to automatically tilt because it knows I have the screen in horizontal mode, which is then going to match the mode of the display down below. Iím going to go ahead and turn on my GPS signal. Aaah, I have to use the iPhone touch screen, and Iím going to go ahead and turn on my GPS signal, and off we go.

    Letís go for a drive. You think the most logical choice of applications would be Google maps. Itís built into the iPhone. The problem with Google maps though is that it doesnít realign itself based on the horizontal position of the iPhone. So you can see that Iíve got maps running up here on top, but itís displaying in a horizontal format down here. So letís go take a look at some other apps that work well in the car.

    So maybe your next thought is to use Google Earth. Well, Google Earth would be a great option except it crashes when you use it with Screen Splitter. So Iím not quite sure if itís just thereís too much CPU load and Google Earth shuts off, but donít use Google Earth. Try an app from a company called Earthscape. Earthscapeís app works great. It loads, it has the follow-me option, and itís a great overview of where you are, give you some great side imagery while youíre driving around.

    So letís take a quick look at that. They have two modes. They have a pan mode and a follow-up mode which is perfect for driving. Letís go for a drive.

    Another great app I love to use in the car is Pandora. Letís check this out. So weíve got some Dave Matthews playing. [Music] Youíve got album art down here. All the Pandora controls on top here. The audio input comes through my device so I can control the audio levels right here on the device. The skip tracks. All these things that you can do with Pandora normally you can do and have it all amplified right here on the big screen.

    So YouTube? Yep, that works, too. [Music] So any movie you have on your iPhone can also be played here, too.

    Let me guess. You want to know how to get started. Okay. Weíre going to need a couple of things. Youíre going to need a cell phone that has video output. I happen to have an iPhone 3G, and you can buy this little cable over at the Apple store. Itís a little bit expensive, but it does some nifty things. It takes audio and video out, so this plugs into your iPhone, and this plugs into the audio and video input source in the back of your car.

    So then your question is, how do you get audio and video into your car? Well, thereís a ton of aftermarket devices like this one here thatís made by Paq, but almost every car with a video screen has a device like this that you can install in your car and it has video and audio inputs to quickly allow any screen in your car to take the output from your cell phone. So get a cell phone with video output, get a cable, and get one of these adapters, and then you can get video in your car.

    Now that we know that the PND is dying, you may ask what is the future of products in your car? Well, to answer that itís going to be mesh-ups of existing consumer electronics hardware. In my right hand here I have a very simple wireless Bluetooth mouse from Apple. This is one piece of the future. In this hand I have a 7Ē touch screen, and this is just basically a four-wire resistive touch screen. And so what I think weíre going to see is weíre going to see hardware mesh-ups where electrical engineers and industrial designers mesh these two products together.

    So we take the serial output of this touch screen display and we mesh it in with some Bluetooth wireless technology, and now we have a really quick instant aftermarket touch screen modification for your cell phone.

    So now you can throw this guy, your cell phone, in your glove box with your video output device and then instead of even touching your cell phone, now you can control you cell phone with this wireless touch screen, so you can take it in and out between cars. Itíll be different sizes of screens manufactured based on what size screen that you have. Eventually multi-touch technology will be implemented in these aftermarket screen accessories. And that is just the beginning of the future.

    Mark my word. Your cell phone will kill your Personal Navigation Device. It might take a year or two, but itís going to happen. There are a million technologists and hackers that are visiting our website monthly that are getting technology like this into their cars.

    Join them and help them kill your Tom-Tom and your Personal Navigation Device. This is exciting stuff. Thanks for watching our blog.

    Updated 12-07-2009 at 03:01 PM by Heather

    How To Videos , mp3Car News
  3. DIY Ė Wireless USB monitor

    by , 02-24-2009 at 05:55 PM

    How to build your own wireless USB monitor - We took an IOGear wireless VGA device (GUC2015V), an M1-ATX, a Lilliput 10Ē monitor and a laptop battery to make a super hacked wireless monitor. If you spent more than an hour on this you could really make this hack usable. We couldnít get more than 15í of range out of this with line of sight, but it was fun to try. Based on the amperage of the devices, we could theoretically get a few hours out of this per charge.

    ***Update 2-26-2009
    Other power supplies that could be used:
    The m3-atx is probably a better supply to use for this project.

    How much Power does this use?
    260 milli amps for just the receiver.
    1.1 amps for the receiver and screen.
    Our battery has a capacity at 14.8 volts of 6600mAH.
    Does this mean we get 6 hours of run time? Wow.

    Host CPU Loads tested on my desktop
    DisplayLinkManager is what does the processing for the Wireless VGA adapter.

    Hardware used for testing
    3 year old 2.8 Ghz Pentium D Dual core CPU
    4gb of Ram
    Windows XP
    800x480 output

    CPU Load Results
    0% - CPU load with an idle screen (desktop only)
    0-2% - CPU load with google talk
    2-3% - VLC movie paused
    9%-12% - VLC playing a movie

    Part 2 Video Transcript:

    Hi. My name is Rob Wray with MP3 Car. I told you we would test out this wireless monitor in the car, so for the last hour weíve been goofing around in the parking lot of our office trying to get this to work. And actually it worked perfectly right off the bat the same way as it did work in our office. I just wanted to do something off-the-wall with it.

    So itís working perfectly. I happen to have a Centrifuge help video loaded on the monitor right now. Weíve got a great wireless signal. Weíve done some calculations recently. We think this little hack job here can get about six hours of wireless time using the 10Ē monitor. So thatís pretty exciting. And weíve been really happy with the video quality playback.

    The first thing that we tried to do to hack it, to make it look kind of cool and newsworthy was to hack in a USB HDTV tuner. So we did that. It worked well except the HDTV wonít play on this monitor. Thereís certain things that donít work well over ultra wideband USB and apparently the GT HD tuner that we sell in our store is one of those things that doesnít work well.

    We also had some problems with getting StreetDeck to work well wirelessly over ultra wideband, but things like VLC which I used in my previous demo worked wonderfully. You get great frame rate playback, and that sort of thing. So Iím going to go ahead and start this movie here, and you can see that the picture qualityís pretty good.

    So weíve been pretty happy with this as a solution. The only thing that weíve seen is that, again it doesnít support all video formats, and you also get Ė every now and then youíll get a little bit of a wiggle over here on the left side. Iím assuming thatís from some type of interference thatís happening as a result of the engine alternator or various other little things. But it was happening before and now itís completely gone away, so I think itís almost unnoticeable.

    So try this at home. Thanks for watching our blog.

    Updated 09-17-2009 at 04:23 PM by optikalefx

    How To Videos
  4. How to build your own car computer - Telematics bundle

    by , 11-02-2008 at 05:39 PM

    This question has been asked over and over again so we decided to film the answer in HD as a way to test out our new camera. We have filmed the assembly of our telematics bundle.
  5. Car Computing 101

    by , 08-22-2007 at 10:40 AM
    Car PC's are custom installations. Beyond the basics of ensuring that a car PC is installed safely, there is no 'right' way to do it. Some hobbyist prefer their installs to appear as if they came from the factory while others don't care if there is a tangled mess of wires strewn across the dashboard. It's all up to your personal preference.
    This means a considerable amount of research and planning must be undertaken by the hobbyist to solve specific problems associated with placing a computer in a mobile environment.
    Below is a list of things that a carputer can (possibly) do. This list is by nature never complete.
    Why would anyone want a computer in their vehicle?

    The answer can be summed up in one word:
    This may seem contradictory, considering that computers require a good deal of maintenance in order to maintain stability. There are software updates, new hardware, the occasional system crash, and other aspects of computing that make it far from convenient. The goal of every vehicle computing hobbyist is to minimize the need for all of these, and there are a variety of approaches to do so.
    The convenience comes in when you have a centralized system for all the functionality you want from your PC, as opposed to multiple gadgets for each function. A single PC can provide music file playback, DVD playback, satelite radio, GPS navigation, diagnostic information from the vehicle (usuall OBD-II), internet access and hands-free cellphone operation. In order to achieve all that with individual products, you'd need a high-end audio/video system, a GPS system, a satellite radio receiver, a scan tool for diagnostics, and a device capable of internet access such as a PDA or a laptop. The PC will usually be cheaper than all the gadgetry involved for all that functionality, not to mention you'll have central control of all the functions, ideally through a safe driver-friendly interface.
    Show cars are increasingly using computer control for many systems, including operation of mechanical systems such as power windows and locks, actuators to open hatches or doors, and so on.
    One of the favorite responses among CarPC hobbiests when asked what ll they can do with their CarPC:
    Anything you can do with a desktop computer can be done with a vehicle computer.
    The only limits to what you could have your carPC do are in your own imagination.
    Typical system

    A typical Carputer system is composed of four parts:

    • Machine

    • Laptops / Notebooks
    • Apple / Macintosh
    • Windows
    • Linux
    • DOS
    • Displays
    • Interface Hardware
    • Power


    The machine is the heart of a carputer system. Based on budget, enthusiasts can easily incorporate and install essentially any computer. Back in 1999 - when hardware prices were still pretty high and laptops were thousands of dollars, the first carputer systems were based on hardware such as 233 MHz desktops. Prices have come down so much on small form motherboards that even those on a budget can build a small machine for little money. There is a growing market of used carputer hardware for sale - which helps the beginner afford a system and learn the ropes.
    In 2007, many carputers run at CPU speeds in excess of 2 GHz. Typical memory varies from 512MB to 1GB. As always, performance and flexibility will be a function of the available processor and memory resources.
    However, there is a point of diminishing returns here. As a user, you will need to ask yourself if that 3.4GHz Hyper Threaded processor is going to gain you any benefit in the car. You will have to figure out how to cool it adequately and how to power it since CarPC power supplies are not all that powerful at this time.
    The machine can run on any platform including Apple / Macintosh, Windows, Linux, or even DOS.

    You have to be able to command your carputer system. Preferably, this process should be as easy as possible. Initial carputers (pre-2000) typically used LCD or VFD character displays to interface and play music. Commands were typically sent to the carputer by means of a keyboard. Not far after the initial advent of the carputer, many people started using a wireless serial port remote to control their machines. This was about the time that small TV screens became affordable. The majority of the first (affordable) carputer screens were RCA video input only, not VGA input. To learn about the differences between VGA and RCA screens, please see this FAQ.
    This awkward phase of sub-par display devices was frustrating to the carputer community. Users had difficulty justifying $1000+ for a VGA Touchscreen, and for the most part, screens that nice were rare or just unavailable. Modern screens are leaps and bounds better than those of just a few years ago.
    The most common modern-day screen that people use is the 7 inch VGA touch screen. One of the issues that still make these screens less than ideal is daytime visibility. Now even solutions to this problem are surfacing. There are transflective options as well as other enhanced screen options. This is sure to improve at a rapid pace as the demand for more viewable daytime screens increases.
    Interface Hardware

    In addition to the touchscreens, many other options exist to interact with a CarPC in a manner that does not distract the driver from the most important task - keeping the car on the road.
    Wireless keyboards are commonly used in the CarPC environment to manage and maintain the system.
    Other alternatives for control involve the use of either IR or RF connected remote controls for hands-only, driving-friendly control.
    Another notable mention, although technically a software more than hardware, but a very versatile & popular interface option is Girder, which will allow almost unlimited control integration of hardware to software control. It will allow you to custom program a remote control, or integrate many different possibilities of hardware button controls, from a custom built button interface using anything from a keyboard matrix to a simple keypad. Girder is worth checking out if you are after custom controls.

    Once you have your machine and your displays a long with all of the other gadgets that you want for your carputer you will need some way to power it.
    It all comes down to two options:

    • A power inverter
    • A DC-DC power supply

    Your car's battery puts off 12 volts of DC electricity. Computers natively utilize DC power as well. Because most computers are used in the home or office, they must be able to convert the electricity that comes out of the wall (which is AC curent) to DC current. This is where you will need a power inverter to convert the DC current from the car to AC current that the computers power supply can utilize. Then the computer power supply converts the AC power back into DC power so that the computer components can utilize it. In short, if you choose to use a standard computer without a CarPC specific power supply you will need a DC-AC inverter.
    Your other option is to use a DC-DC power supply (such as a M2-ATX) which will allow you to connect the 12 volt DC power from your car to your computer. Most DC-DC power supplies have other features such as an ignition switch which will turn your computer on when your car is started and will send a signal to go through a soft shut-down process or put the computer into stand-by or hibernation. Most of these DC-DC power supplies also incorporate an amplifier turn-on signal which is timed to not send a turn-on signal until the CarPC has alredy started the boot-up process. This feature is usually configured to prevent amplifier turn-on thump which can not only be very annoying, but can also damage your speakers.
    To learn more about the various DC-DC power supplies, you can read in this fourm: PSUs. You can also purchase many of these power supplies here on our very own store.
    Considerations in Choosing Hardware

    Space Availability

    There is a limited amount of space available in any vehicle for installation of any additions. For a computer installation, "smaller is better" is the general rule. The smaller form factors of motherboards and systems make popular choices for vehicle installations. Not only for space, but for power requirements and for heat generation.

    • Pico-ATX

    Pico-ITX motherboards are new to the market and are now the smallest motherboard avaliable on the market. With a form factor of only 4.5" X 3.3" (10cm x 7.2cm) these boards are ideal for vehicles with little space. You can read up on this form factor here.
    • Nano-ITX

    Nano-ITX motherboards are another small form factor. As with all small-sized electronics, they are more expensive. Due to the limitations of the small size, they are also lower in computing power compared to a typical desktop PC. Nano-ITX motherboards measure 4.8" X 4.8"(12cm X 12cm). You can read up on this form factor here.
    • Mini-ITX

    Mini-ITX motherboards are small enough to fit in a standard DIN-sized dash opening. Via makes a range of motherboards with built-in CPUs that range in speed from 600mhz to 1.5Ghz. There are also models that will accommodate a P4 CPU. They measure a little less than 6.7" X 6.7" (17cm X 17cm). You can read up on this form factor here
    • Micro-ATX

    Micro-ATX motherboards are designed to mount in a case designed for its larger ATX counterpart, yet still be smaller in size. The official specification calls for a maximum size for 9.6" X 9.6" (24.4cm X 24.4cm), although many are not as large as the maximum specification. Micro-ATX motherboards exist for any CPU manufactured.
    • Flex-ATX

    Flex-ATX motherboards are an addendum to the micro-ATX standard. They will mount to a full-size ATX case, but the specification calls for a maximum size of 9" X 7.5" (22.9cm X 19.1cm). Like Micro-ATX motherboards, there are models to accommodate any CPU on the market.
    • Shuttle

    Shuttle brand motherboards and PCs do not fall into any of the form factors above. They utilize their own mounting scheme for motherboards and cases. There are Shuttle models that are compatible with every CPU manufactured. A Shuttle form factor motherboard measures just under 8" X 8" (20.3cm X 20.3cm). It is important to note that Shuttle also manufactures motherboards in other form factors such as MicroATX and ATX.
    Heat Dissipation

    Heat is the enemy of all electronics. Keeping a computer cool is necessary in order to keep it stable and trouble-free. Computer components generate heat that must be be removed from the general vicinity of the component(s). Generally, lower-power hardware generate less heat, but it still must be dealt with to ensure stable, reliable operation.
    Power Consumption

    There is a limited amount of electrical power available in a vehicle and there is a limited amount of power avaliable through the currently avaliable DC-DC power supplies. As such, the amount of power drawn by the PC must not overload the vehicle electrical system or DC-DC power supply so that the important systems of the vehicle will be able to operate.
    Computing Power

    Every task a computer performs utilizes CPU cycles and memory. The faster the CPU goes through the cycles, the faster the task will be performed. For a vehicle installation, the CPU needs to be able to perform all of the processing tasks required in the vehicle. Some tasks, such as DVD playback and video recording, require a good deal of CPU speed, while other tasks such as music play back and internet access do not.
    One of the more common motherboards used in vehicle installations, the EPIA M10000 by Via, has a 1Ghz C3 CPU and is adequate for most vehicle tasks.
    Obviously, faster CPUs will result in faster performance.
    Other Aspects of a Carputer Install


    Most motherboards include on board sound. They can range from 2 channel up to 8 channels depending on the motherboard. Some include SPDIF (COAX or Toslink optical out) as well. You can however upgrade your sound card to achieve better sound results or to do features that on board sound cannot do. You should plan ahead and figure out if you only 2 channel, 4 channel, 5 channel, or more depending on how you want to control the speakers in your car. A common question that arises is:
    Should I use onboard sound or an upgraded PCI or external soundcard?
    System Features

    NOTE: Some of the features/ideas below may be illegal to run while a vehicle is in operation. Users should always check current local laws regrading proper use of their systems.

    • Play music from CDs, hard drive (MP3s, other compressed files) or external device (USB/PCI FM radio receiver, etc.)
    • Benefits over a head unit with music file (MP3/WMA) playback:

    • Support for additional formats, such as loss-less OGG, as well as DRM-protected files (via iTunes or WMP).
    • Faster indexing of songs (useful when there are hundreds or thousands of songs).
    • Ability to directly download songs (via cellular data connection, or Wifi if close to an access point).
    • Faster, easier playlist management

    • Play video from DVDs, VCDs, or from the hard drive.
    • Install DLP or LCD projector to create a mobile "drive-in" movie theater.
    • Create a mobile video production system (Capability to pull video from a camera, edit it, compile it, and burn it to DVD).
    • Real time monitoring of webcam and/or DVR video feeds, & can be reason enough to install a webcam or DVR.
    • View over the air tv channels (regular and HD) with a tv tuner.

    Audio Tuning via Software

    • Use ASIO to allow you to use VST plugin effects.
    • More Advanced Equalizer - parametric or up to 61 bands of adjustment.
    • Crossovers and filtering to run an active crossover system dividing the audio frequencies and sending them to specific speakers.
    • Time Alignment to delay sound coming from different speakers in different locations, but make it appear as if the sound is coming from a central location or more realistic soundstage.
    • RTA or Real Time Analyzer helps you smooth out the frequency response of your system by measuring the response with a microphone and software to aid in adjusting your EQ.

    GPS Integration

    • Provide GPS Tracking/location tracking, route planning and GPS navigation, etc.
    • Using your GPS receiver, store logs of locations vs speed and time of day. This could be uploaded to a collaborative site for predicting travel times vs time of day (very useful in areas where freeway congestion is variable).
    • Provide real-time tracking of vehicle location.
    • Get live traffic data (requires GPS that supports this feature)
    • Combined with wireless internet use mapping software (e.g. Google Earth) or web pages with live display or to route or do geographic searches.

    Satellite Radio

    • Satellite radio through external receivers.
    • View XM's NavTraffic via your carpc.

    Wireless Internet

    Note: This topic includes both wireless cellular services such as GSM, Edge, and EVDO as well as local wireless ethernet Wifi (802.11, access point) connections which are different and should not be confused).
    • Internet browsing through an eligible cell phone or wireless 802.11 connection.
    • Wireless synchronization of files between desktop and carpc.
    • Wardrive: Use your 802.11 b or g wireless connection and GPS, locate and log locations of wireless access points.
    • Use broadband internet phone options with cellular data card (Note that quality will be limited since cellular data normally has high latency).
    • Download traffic/weather information from internet.
    • Wireless Mobile Routers (e.g. Kyocera KR1) when used with a wireless broadband card can turn your car into a wireless access point.

    Cell Phone Control

    • Hands free cell phone control via software with Bluetooth.
    • Connect to a mobile phone or other device using Bluetooth (useful for voice and data communications and synchronizing with PDA's, etc.)
    • Send & Receive text messages via your connected cellular phone using your carpc
    • Enhanced contact list with large pictures

    On-Board Diagnostics

    • Connect with your car's OBD-II, J-1850, CAN, i-Bus, or Consult interface and display real-time data on all diagnostic information available. (RPM/Temps/Speedometer/etc.)
    • Pull and clear error codes immediately.
    • Find 0-60, 0-100, 60-0, 100-0, 1000', 1/8 mi, and 1/4 mi times (Use GPS to mark ideal performance testing sites)
    • Find vehicle horsepower and torque
    • View live data with graphs of fuel injector pulse widths, knock adjustments, O2 sensors, etc.

    Video Games / Emulators

    • Play video games
    • Run an emulator and have accessibility to any game that you have a backup copy of. This can range from Atari 2600 and Sega Master System to Nintendo 64 and Playstation. The emulator you can run is only limited by the systems resources. Alternately include an actual gaming system in the car.
    • Connect a controller from the system of your choice to your CarPC. Microsoft Xbox controllers are very simple to modify yourself and drivers are readily available. If you prefer a controller from another system there are companies that sell them with USB connectivity pre-wired.
    • Install multiple monitors and controllers for mobile multiplayer gaming


    • Display video from car mounted camera for backing up. (infrared cameras are available for backing up at night)
    • Record video from a webcam/mini-dv camera and store it to the carpc for later perusal. (good for recording close calls on the freeway - setup a rolling buffer which stores the last X minutes on button press)
    • Provide night vision capability with infrared cameras.
    • Process video from car in real-time using image recognition software. Capture license plates and store in database with GPS location.

    Vehicle Control

    • Control windows and locks via relays.
    • Control Climate Control via software.
    • Control exterior show lights (under glows and accent lights) via relays.

    • Gain control of ignition timing, air/fuel maps, shift points, boost control, top speed, rev limits, etc. (WARNING: This requires a thorough knowledge of vehicle systems and should only be attempted by qualified individuals)

    Other Devices

    • Radar Detectors (e.g. the Valentine V1 by using the remote display)
    • Add a small printer to print a map for someone else, or print a quick report for work.
    • Media players via remote control
    • PDAs

    Updated 09-17-2009 at 03:16 PM by ecog

    How To Videos