For my Droid sound, I use a CF-III sound system from ACS. The unit includes a FlashCard sound player, a good audio amplifier, and fully featured BASIC programming environment. The updated CF-IV version is shown below. It is quite expensive but was the best option at the time. I now recommend the much less expensive MP3 Trigger system. The CF-III advantage is that it can be run with a 12 channel remote without any need for a microcontroller system, and has an integrated amplifier.

Jun 1, 2006 — I've got high pitched squeaking/squealing noise coming from the front drivers side of my car. It sounds kind of like a bird chirping.

It won't be hard to tell if your vehicle has broken wheel bearings. The most common symptoms of worn wheel bearings are squealing or grinding noises that get louder the faster you go. The noise could emanate from the front or back or the left and right of the vehicle, depending on which wheel bearing is going bad. Sometimes, you might notice a humming noise or clicking sounds coming from the front or rear wheels, which could be mistaken for tire roar or road noise.

You'll need to go to the wrench menu and click "Reset to Defaults" for the music sounds to work properly. If you had made custom changes to the sound settings in R2 Touch, you will have to re-enter them.

For instance, a faulty wheel bearing may cause uneven tire wear, wobbly steering, and an illuminated ABS (Anti-lock Braking System) warning light. An easy way to check for broken wheel bearings is to place the car on a lift or raise the affected side with a jack and a heavy-duty jack stand. Next, grab the affected wheel from both sides and try shaking it. The wheel should not move unnecessarily if the wheel bearing is solid. However, replacing the wheel bearing is necessary if it shakes or moves in its axis.

8- You can play the sounds either via the contact inputs or by sending commands through serial interface as described below.

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The sing file category is no more, and replaced with the user file category. The "user" bank is not accessible via R2 Touch, but is accessible via the CF-III switches. I have moved my own sing- files to mus- files. If you want to use the user bank, name the files user-xxx.wav.

The wheel bearings consist of steel ball bearings inside the wheel hub. They enable the wheels to roll smoothly and silently while providing anchor points for the vehicle's steering, suspension, wheels, and brake components. When a wheel bearing goes bad, the affected wheel will wobble or move unnecessarily, wreaking havoc on the many undercarriage parts that rely on proper alignment to work correctly. As the problem worsens, the grinding or squealing noises get louder, which means the wheel bearings are near total failure.

Oct 11, 2009 — If the sound your hearing sounds like a tire skidding or metal, the problem is likely a strut mount. When the strut mount bearing fails it stops ...

The factory wheel bearings in your car do not require periodic maintenance and are, in most cases, designed to last the life of your vehicle. However, the grease inside the bearings could get contaminated by prolonged exposure to rain, mud, road salts, and sand. Meanwhile, overloading the vehicle or driving over speed bumps, curbs, or potholes could prematurely damage the wheel bearings.

Play sound y or yy from bank x (x from 1 to 9, y from 1 to 9, yy from 10 to 99). MP3Trigger platform implements sounds only up to yy=25.

Some particular sounds have been given their own command for convenience, they point to specific files in the default image provided below, you can change their assignment by editing the code:

I provide a pre-made flash card image that contains both the program and default sounds. It will work with R2 Touch out of the box. Just download the file and copy to your memory card, you should be good to go

We had a bruised and battered Mitsubishi Mirage G4 with unusually high miles, and we had to replace the wheel bearings thrice during its useful life. In one instance, the right rear wheel was wobbling badly and making loud, grinding noises, whether moving fast or creeping forward from a stop.

201967 — Balls and rollers may be assembled loose into stamped or roll-formed rails or installed into retainer assemblies. Common bearing applications in ...

Version 1.2 and above of R2 Touch support the MP3Trigger sound system. In order to support both CF-III and the MP3Trigger with the same app, a few changes have been made on the CF-III program and the sound organization.

5- Before you copy it on your CF memory card, change the values of the variables Nx (lines 110 to 540) to match the numbers of sounds you have in each banks.

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The program respond to commands sent via the RS232 port at 9600 bauds. Commands must start with $ and finish with a Carriage Return character:

The music sounds have been moved from Bank 9 to Bank 8. You do not need to change the naming of the music files, but you need to edit the number of files in bank 8 to reflect the number of music files instead of the number of the sing files.

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2016528 — The most likely cause would be that the new rotor is not fully seated on the hub. This is assuming the hub splines slide freely onto the spline of the axle.

The good news is that you don't need to replace the wheel bearings on all four wheels if only one side has worn out, but replacing the wheel bearings as a pair wouldn't be a bad idea. If the wheel bearing in the right wheel hub has gone bad, it would be better to also replace the bearings in the left wheel, but it all depends on your budget.

I added an optional 8 contact sensing board so I could remote control it from a simple 12-channel remote. I later programmed the unit so I could also control it from the RS232 input via my iPhone App and MarcDuino boards. It makes the contact board unnecessary, but it's a nice addition and I kept the simple 12 channel remote functionality in place, just in case.

A complete Memory Card image for the CF-III is available for download here. Instructions to create your own customized version are also provided below.

I arranged the sound files in categories or "banks" of sound, following an idea I first saw presented by Chris James (see his video here). This makes it very easy to put some order in my large sound collection and call the right sound for the right mood. Then I added the CFSOUND.BAS program file below to make it respond to both the contact boards and my R2 Touch iPhone App commands. You will need this program or another sound device that is programmed to respond to the same commands to use my iPhone App as is. Alternately, you could customize R2 Touch app to send other messages that your system will understand.

The bulk of the wheel bearing replacement cost is attributable to the labor. In some cars where the wheel bearings are easier to access and remove, the labor cost could be around $80 to $200. The wheel bearings cost anywhere from $40 to $120 each, depending on the vehicle. You'll have to pay more if you have a larger vehicle like a full-size SUV or heavy-duty pickup truck, which could reach over $1,000 in parts and labor.

No, we do not recommend driving a car with faulty or noisy wheel bearings. The wheels could fall off the vehicle while driving, which is not a great way to start your day. Broken wheel bearings will cause the affected wheel to wobble incessantly while the car is moving, and this will cause various issues with the steering, suspension, and brakes, like vibrations when braking or turning the wheel.

The sound files on the memory card are organized in 9 banks, using a simple file naming convention. Note that a sound is accessed programmatically by its bank number and its number, not directly by its file name. You don't need to program anything if you are using the R2 Touch application and the MarcDuino boards, they send all the serial commands for you.

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If you update to R2 Touch v1.2, you also need to update your .bas file to the new version 1.9 provided at the bottom of this page, and your MarcDuino firmware to version 1.6.

2- rename the sounds files according to the naming convention above (e.g. chat-1.wav, chat-2.wav...), and copy them to the card.

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2020621 — The noise is more prevalent in Reverse. You can also hear it in drive when going at a slower speed and turn the wheel sharply.

Noisy or broken wheel bearings are a safety concern for any vehicle. It also makes some vehicles almost undrivable. If you notice strange, grinding noises while driving or feel one side of the vehicle wobbling, bring the car to a mechanic as soon as necessary before the issue worsens or the wheels fall off.

A description of the commands is provided below. This command set is used by my R2Touch App and the MarcDuino boards. Any sound system that implements the same command will work too.