Optical mouse module

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Optical mouse module

An optical mouse's "optical surface sensor" must be kept a certain distance from the table for it to function properly. A new optical mouse's plastic base is designed to keep the "optical sensor" an optimum distance from the table.

Optical Mouse USB

After many hours of moving the mouse about on a table, the mouse's plastic base slowly wears away causing the optical sensor to become to close to the table's surface which then causes the sensor to malfunction jittery, slow unresponsiveness.

The simplest way to correct this problem is to is to rebuild the base's surface. This is done by sticking on a few layers of sticky labels onto the bottom of the mouse so as to raise the optical sensor up from the table to the distance it was when the mouse was new.

As time goes by and when the labels eventually wear out from use you can just replace them. Did you use this instructable in your classroom?

Add a Teacher Note to share how you incorporated it into your lesson. Reply 4 years ago on Introduction. By Dirt Farmer Follow. More by the author:. Add Teacher Note. Did you make this project? Share it with us! I Made It! Embed Tinkercad Designs in Instructables by bekathwia in Websites. Reply Upvote. HussamK1 2 years ago.The trouble is that a degree of wheel slippage is inevitable on carpet, and so encoders cannot be very accurate.

Another team member, Maciej, suggested an interesting solution: the sensor from an optical mouse. So, after doing some reading on the topic, I went around the corner and bought a cheap optical mouse, and took it apart.

The inside looked a lot like this:. Seeing the staggered pin arrangement was the same in that document, I became confident that I had the right datasheet, and I extracted the module from the mouse PCB. I then cobbled together my own circuit based on the schematic in the datasheet, running the module at 3. I added voltage dividers on the two serial lines to level shift. Unfortunately I saw a lot of garbage coming from the chip, and the serial protocol was not defined in the datasheet.

I then realized that the serial synchronization was essential to getting meaningful results from the module. I added code to synchronize every read commands, and was able to read the product ID. I was lucky that it held up. I added a voltage divider and a large capacitor on the power supply to get a stable 2.

I used the current revision Plobot board I had on hand as a driver. These EMI suppression capacitors were actually essential to making the robot work! Without them, the optical sensor module would malfunction severely when the motors ran.

This issue frustrated me for a few hours. Finally, after writing a quick and dirty control program using the Atmel microcontroller on the Plobot PCB, I had a working robot built around the optical sensor. No encoders or motor feedback sensors of any kind! The results with this sensor were not accurate enough to be a full solution for moving on the rug on its own. However, it could work well to complement encoders to detect slip, and I will be experimenting with higher quality sensors as well.

While turning, it is balanced to minimize Y movement. Could you send me a simple code to read Product ID with arduino? Like Like. The code you commented has many errors in arudino studio, however, I could catch the important things, for example, how to make clock-like data, ….

Finally I corrected the code, and get pretty good value. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account.Accurately determining the progress of a wheeled robot can be pretty tricky and expensive! Dead reckoning assumes that our motors are perfectly matched, our wheels don't slip and the surface we are running on is perfectly flat: most of these conditions are unattainable and are never guaranteed.

Rotary Encoders on the wheels or motors are more accurate, they certainly remove the need for matched motors and can deal with incline changes, however slippage is still an issue. Ultrasonic or Laser range sensors circumvent all of the mechanical issues that plague dead reckoning and encoders but require stationary fixed points of reference, are subject to interference objects coming between the robot and the reference point and have issues with regard to range, accuracy and resolution the more you want, the more it costs!

Ideally, we want a sensor that can accurately measure positional changes in two dimensions, has a simple interface, has low power requirements, is easily obtainable and cheap into the bargain.

The solution: that old optical mouse you have lying around! Computer mice are designed to do just what we want: very accurately track the two dimensional movement of an object in near to real time. We do have to choose our mouse a little carefully however. I happened to have an old Microsoft USB1. Did you use this instructable in your classroom?

Add a Teacher Note to share how you incorporated it into your lesson. First things first, we need to open the case and liberate the electronic goodies within. I chose to do this because the mouse is far too big and bulky for my robot. Remove rubber adhesive feed covering screws at the rear and clips at the front Remove the two screws at the back and then use a small flat bladed screwdriver to push back the clips holding the top and bottom parts of the case together at the front.

This may take a bit of fiddling, I actually inadvertently broke one of the clips in the process.

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Once the case is open, remove the scroll wheel and then any screws hold the circuit board to the case. There may also be a few small plastic clips that retain the circuit board. The small screwdriver used before and some wiggling should free the circuit board s from the case. There should be a clear plastic piece under the circuit board the lens which will also need, so retain this and the circuit boards, discard or file!

If you plug the mouse into a computer or laptop, ensuring the lens is correctly in place on the bottom, the mouse should work normally when you move it around. Now we've got our hands on the board we need to connect it to our microcontroller. To do this we can either use the existing cable USB in my case and wire an appropriate socket or we can replace this wire with some of our own.

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We also need to determine the function of each of our new wires. The original wiring can be seen in the first image above and functions are, left to right, as follows:. I chose to desolder the existing cable form the board and replace it with some wires with Arduino friendly Dupont connectors. I also chose not to connect a wire to the shield connection as its not strictly necessary. We then connect the mouse to our microcontroller of choice, an Arduino Leonardo Nano clone in this case, as follows:.

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Now we've connected everything up we need some software for the microcontroller. The library contains a simple example sketch PS2 Mouse.Less commonly seen are custom mice, but [gipetto] has crafted just such a device to suit their tastes. The mouse is based on the PMW sensor, prized for its inch per second speed and 50g acceleration capability. Building your own mouse from the ground up is a great way to get yourself an input device that perfectly serves your needs.

You build one, of course.

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The mouse, which looks frozen mid-transformation into a rodential assassin, is a customized work of utilitarian art. Despite the excellent results, this project was not without its traps. After trying his hand at making homemade salt dough, he painstakingly whittled a base from scrap pine using a drill and a hacksaw.

optical mouse module

Every bit of this mouse is made from recycled bits, which, if you pair that with the paint job and the chosen shade of blinkenlights, makes this a green mouse on three levels. We love the thumb-adjacent scroll wheel and the trackball itself, which is a ping pong ball painted black. The cool part is the guide it rolls around in. All that plastic shaving paid off, because the action is smooth as Velveeta.

For a truly custom fit, try using whatever passes for Floam these days. He wired a momentary button in parallel with the left mouse button. A 50k mini pot used as the discharge resistor allows him to dial in the sensitivity.

There are lots of other cool things you can do with an optical mouse, like visual odometry for cars and robots. Wanting to experiment with using optical mouse sensors but a bit frustrated with the lack of options, [Tom Wiggins] rolled his own breakout board for the ADNS optical mouse sensor and in the process of developing it used it to make his own 3D-printed optical mouse. To work properly, the sensor needs a lens assembly and appropriate illumination, both of which mate to a specialized bracket along with the sensor.

But it is clever for a whole bunch of reasons. For one, using a mouse sensor as a low-res camera is awesome. Hacker spillover! So [Neumi] takes two readings with the camera — one with the laser on and one with it off — and differences them. The code is up on GitHub. Not a bad build for a 2D laser distance system on a budget.

No offense to [Douglas Engelbart] but the computer mouse has always seemed a bit of a hack to us and not in the good sense of the word.

There are plenty of alternatives, of course, like touchpads and trackballs, but they never seem to catch on to the extent that the plain old mouse has. One interesting variation is the pen mouse.

These do rely on a pre-computer analog: a pen or pencil. You can buy them already made and they are surprisingly inexpensivebut what fun is that? The main parts of the pen mouse include a cheap mouse with a failing scroll wheel, a bingo pen, and the base from an old web camera.He has a pretty good start, but was having some problems accurately measuring travel distance. The technique he chose for the task was to glue magnets onto the axles of the vehicle and monitor them with a hall effect sensor.

Laser vs Optical Mouse - Which Is Better for Gaming? [Simple Guide]

Those sensors are finicky and a few problems during testing prompted him to look at a redundant system. Recently we saw the same concept used, but it was meant for tracking movement of a full-sized automobile.

ADNS2620 - Optical Mouse Sensor IC

If it can work in that application it should be perfect here since the vehicle is much closer to the ground and will be used in ideal conditions flat pavement with clear weather. Above you can see the Arduino Leonardo he used for the first tests. This brings up a question, is there limit on how fast the vehicle can travel before the sensor fails to report back accurately?

Hi I have used the optical mouse technique since Here is my system from Anyone know where you can find the sensor modules themselves? It appears that Avago has left that market. Ingenuity is another way of saying looking at the existing and finding more ways to use it.

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On a personal note, stay away from older Microsoft Optical Mice as the boards in them were why my optical mice died horrible, painful deaths and not the games I was playing or the solder reworking to get them running again. I have been working to source a similar module for a project at work.

Avago is indeed out of the market, but they have sold the rights to produce many of their old optical products to Pixart Imaging out of Taiwan as noted in the linked press release. Their website is awful but I spoke to their US sales office and they were pretty helpful.

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Of course, I was shopping for somewhat larger quantities than one, but depending on your planned usage they might be able to help you out. Stop looking at the ground and monitor the wheel or a disk attached to the wheel. And you can position the disk at the optimum position and color it for best pickup. Gear the disk for more or less accuracy. And if the wheel is no longer in contact with the ground?

Optical tracking of the ground is THE most reliable means of tracking speed…hence why it became used in so many farm vehicle automation systems. I live in beet country up in the Dakotas. They have to be the same make of course. They all had just one chip which was directly connected to the usb cable, led and buttons and had the sensor built in.

Anyone know a particular brand of cheap mice that are hackable? If you want to use mouse parts you probably need an older model. It seems to be working! Instead of measuring the ground moving past, can you effectively gear down the travel speed by measuring axle rotation? High end gaming mice usually have dedicated camera chips, where a separate micro cares about interpreting data and implementing the USB interface.

Interfacing with them is a pain, as that is their only output. This site uses Akismet to reduce spam. Learn how your comment data is processed. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Learn more. Perhaps you should beware. Report comment. Leave a Reply Cancel reply. Search Search for:.A premium membership for higher-level suppliers.

optical mouse module

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optical mouse module

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