Tip 1: How to make an electronic speedometer
Tip 1: How to make an electronic speedometer
Speedometer Is a car device used to measure the speed of movement of a vehicle. You can install both a purchased speedometer and a device made by yourself.
You will need
- - a personal computer with Internet access;
- - details;
- - soldering iron;
- - fee;
- - Tester;
- - speed sensor;
- - The compiler.
Instructions
1
Develop or downloadinternet scheme for building an electronic speedometer. By the way, the second method is more convenient, since it will not be necessary to sit above the mountain of literature and search for the necessary information for drawing up the scheme of the electronic speedometer.
2
Purchase the necessary to create an electronicspeedometer details. Depending on the complexity of the circuit, you may need the following components: phyto-diodes, transistors, display, resonator, capacitors, voltage regulators, relays and other parts. You can buy all this in the electronics store or on the radio market.
3
Assemble the electronic speedometer circuit. After the soldering process is completed, use a tester to check the connection quality of all soldered parts.
4
Get a speed sensor and install thiscontroller on the wheel of a motor vehicle. But first calculate the number of pulses per kilometer of mileage: to do this, measure the circumference of the wheel (one revolution - one sensor pulse). Based on this data, calculate the device parameter.
5
Using a special compiler, runFirmware microcontroller. Immediately test the operation of the electronic speedometer, and only then connect the device to your vehicle.
6
Install the electronic speedometer and check its functionality in practice. If there are any problems in the operation of the device, reprogram the microcontroller or change its scheme.
Tip 2: How to make a digital speedometer
Digital speedometer shows the speed of transportMeans, as well as its mileage. This device can be installed in a car with a regular analog speedometer, which is controlled by electrical pulses coming from the speed sensors.
You will need
- - a personal computer with access to the Internet;
- - Printer;
- - Photographic paper;
- - one-side foil-coated fiberglass;
- - iron;
- - Acetone;
- - water;
- - ferric chloride;
- - Brush;
- - flux;
- - soldering iron;
- - a microdrill;
- - scissors for metal;
- - Radio components;
- - housing;
- - display.
Instructions
1
Download the digital speedometer circuit from the Internet. After that, print it on the printer, setting the maximum print quality in the settings. Use photographic paper to print.
2
Preheat the iron. Degrease the surface of foil-coated fiberglass. Then turn the printed sheet over by drawing to the glass cloth and carefully, without moving the sheet, iron it.
3
A little ironing, remove the iron and stopliterally for a minute, and then again apply the iron with pressure over the entire surface of the paper. As soon as the photo paper starts to turn yellow (yellowing is caused by high temperature), stop ironing and wait until the fiberglass is cool.
4
When the glass cloth has cooled down, place itTogether with paper in water, the temperature of which should be 25-30 degrees, and leave for an hour. After an hour, try to carefully remove the paper (note: the toner should be on the fiberglass). If you did not get the first try, press the pattern on another piece of fiberglass and soak it in water.
5
Dilute ferric chloride in water and place inthis solution fee. For rapid etching of the board, periodically wipe the surface with a soft brush. The etching procedure takes literally thirty minutes.
6
After in unprotected places copperdissolve, remove the billet from ferric chloride and wash it in running water. Then rinse the toner with acetone. After that, apply a brush with a brush and proceed to the maintenance of the board.
7
Rinse with acetone flux and drill holes on the board with the help of a microdrill for radio components. Then use scissors for metal to cut out the printed circuit boards. After that, proceed to soldering the parts.
8
Finally, assemble the cards together, place them in the case and attach the display. After that you will assemble the device, install it on the car.
Tip 3: How to set a speedometer on a bicycle
Modern electronic speedometers for Bicycle show not only the current, but also the maximum,and the average speed for the entire travel time, average speed, time, distance and much more. Such a speedometer is a useful acquisition that can be conveniently mounted on a bicycle.
You will need
- Speedometer, finger battery
Instructions
1
Install the speedometer sensor (in the kit there should be special rubber bands or clamps). You may need to turn the bicycle and remove the front wheel.
2
Attach the speedometer magnet to the bicyclespoke. It is important that the distance from the sensor to the magnet is about 1 cm and during the rotation of the wheel they were on the same level. It does not matter at what distance the magnet is from the axis.
3
If the speedometer is wired, then the wire should immediately be pierced to the location of the future fastening of the speedometer and check if the wire is rubbing against the tire, whether it gets into the spokes.
4
Attach the stand for the speedometer to the wheel of the bicycle.
5
After fixing the speedometer on the stand, turn the wheels to check the performance.
Tip 4: How to make a winding to the speedometer
Winding a speedometer is a procedure thatallows you to increase the odometer reading. She has many other names: krutilka, winding, reel. Initially, with the help of winding, the efficiency of the odometer was checked, and in some situations the speedometer. Now most often it is used for winding the kilometer. This is not illegal, and in some cases it is simply necessary. Execute rewinding Can be in various ways, but the meaning itself remains unchanged.
Instructions
1
The winding is applicable to all speedometers, for whichThe speed sensor in the base has a Hall sensor with three leads. Change the phase that goes to the speedometer and tachograph, with the phase of the tachometer. This method requires a running engine, and this is not very profitable. Very high risk that there will be a failure of devices and even a fire.
2
Purchase an electric rewinding, Which is noiseless and takes up littlePlaces. Such windings have a good speed control. Connect it to the diagnostic socket of the car. But remember that this method is not applicable to all cars.
3
The simplest electronic windings have threewires that are mounted in the wiring. Disconnect the wire that comes with the standard speed sensor. Two wires are connected to the power supply: "plus" and "minus", and the third - a signal to the speedometer. Here, the winding is temporary and removable, so make a "tie-in" to the wiring better in an inconspicuous place.
4
For permanent use, connectpositive and negative wire rewind at any convenient place in the car. The remaining two wires are connected to the break in the signal wire, which connects the speedometer and the transmission.
5
This will ensure that the speed sensor is turned off when the winding is on. Now you can fearlessly use rewinding in any situation: in motion, in the parking lot. Conflicts of the system should not be.
Tip 5: How to change the speedometer
It is impossible to imagine a car without speedometer. It is not only an ornament of the instrumentpanel, but also keeps the nerves, money and our health, and sometimes life. A speedometer is an instrument that measures the speed of movement and the length of the path traveled. Without it, even an experienced driver can not do - because to determine the speed "by eye" is very difficult. Like all instruments, the speedometer sometimes goes out of order and needs replacement.
Instructions
1
Carefully disassemble the dashboard in the car. Usually, the plastic case is attached to several screws and snaps. Open this construction and pull it slightly to pull out the wiring. Disconnect all the wires from the rear, so that only the plugs are left to hang. Remember which wires to join.
2
Remove the clear glass that coversDevices on the panel. Usually it is fixed on snaps and not on screws. Be careful - the latch can easily break off and then you need a replacement glass. Then remove the frame, in which there are openings for devices. Wipe it dry with a clean rag, making sure that there are no stains and dust left.
3
Turn the dashboard over to your backside. Take a screwdriver in your hand and carefully unscrew the thin screws, with which the speedometer is attached to the body of the panel. Usually there are four such cogs. Remove the faulty speedometer and set aside. At leisure, study its device.
4
Take the new speedometer, attach it to theThe dashboard housing. Install everything in reverse order. All work will take you about half an hour. Carefully check the wiring. After this, start the car and test the speedometer in action on the road.
Tip 6: How to make the firmware
In order for the phone to function, it has special software, called "firmware". In case you change firmware phone, you can increase the volume of the phone,Add a new type of implementation of the functions that are embedded in the phone. The only thing you can not do is add features that were not provided, because they depend not on the firmware, but on the technical fullness of the phone.
Instructions
1
In order to change firmware, there are several options. You can both reflash the phone using special software, and reset all data that are not system. To do this, you will need to dial a special code using your cell phone.
2
In case you want to reflash the phone, youIt will be necessary to connect the phone to the computer, using a special usb wire, which is in the bundle to the phone. If it is not available, buy it separately. Use the firmware for flashing and firmwarethat fit your phone model. Do not forget to save that firmware, which is on your phone before the flashing. Instructions for flashing, firmware, and itself firmware you can easily find on the Internet.
3
If you decide to reset firmware, contact the manufacturer of your cellularPhone. It is not recommended to use combinations that you can find on the Internet - in this case all the risks for misuse of codes lie on you. Using the code received from the manufacturer, zero firmware And enjoy a completely clean phone.
Tip 7: How to reset the speedometer
It happens that the auto-lovist has a difficult task: to zero speedometer. There are many reasons for this. Correction measures require equipment, the testimony of which began to diverge from reality. Most likely there was a failure. Independently to twist the mileage can only professionals, so if you want to zero the mileage or reduce, then contact a specialized institution.
Instructions
1
There is an opinion that speedometer only to hide realKilometer, which drove your car. However, there are situations in which the adjustment of the mileage is simply necessary. The odometer readings are corrected. And resort to this in the case, for example, of replacing the engine or replacing the odometer. If an odometer with zero mileage is set, then, to bring the figures to reality, it should be twisted in a larger direction. And if you take a used odometer, with a mileage greater than you had, then it needs to be adjusted downwards.
2
Mechanical odometers will not be of interest to you now, refer to the technology of twisting electronic speedometers. Specialized centers have at their disposal an arsenal of improvised means. To reset the reading speedometerbut the programmer, adapter, scanner andOther artful devices. The complexity of the job is that it is necessary not only to change the mileage in the on-board computer, but also to get rid of the information in the memory of the microprocessor. It can be located anywhere in the vehicle and contains, as already said, information about the mileage, as well as the frequency of service inspections.
3
For zeroing speedometerbut reprogramming is applied, and onlygood equipment does not harm the trouble-free operation of the rest of the instrument panel. To date, specialized centers have been using several technologies for zeroing speedometerS. One of them is reprogramming through connectors. This method is used if there is a memory coding and an access protocol. An alternative method is to introduce a new chip, through which you can adjust the mileage, as many as you want. And one more technology: twist an odometer by receiving signals from an external generator. Here, masters will have to go into details in deciphering the data.
Tip 8: How to make a speedometer
With the advent of cars, designers thought about measuring the distance traveled and the speed of the vehicle. For these purposes, it was coined speedometer. Value speedometerAnd for modern transport it is difficult to overestimate. Based on the testimony of this device many regulations and traffic rules are approved, vehicle characteristics and much more.
Instructions
1
If the cars have basic equipment speedometerom, for mopeds and bicycles this (in most cases) is not provided. Consider the manufacture speedometerbut for a moped. The source is taken speedometer SP-101.
2
Take the friction roller from the tape recorder (diameter 25 mm). Slip of the roller on the disc is insignificant. The disc is attached to the front wheel bushing by strong heating and fixed to the spokes.
3
To assemble the drive, first install the brackets on the handlebar and the front wheel axle. Then measure the length of the cable 1.2 mm in diameter and Bowden's shell.
4
To the end of the cable does not disentangle after the stump,Seal it in the place of the cut. Insert the top of the cable into the top of the tip and solder. Attach the upper boss, Bowden's shell and the lower boss. The second end of the cable is soldered into the hole of the lower tip.
5
The bushing is screwed into the lower boss, put the washer on the tip, then the roller and another washer, and then tighten with a nut.
6
Assemble the assembly assembly to the bracket. By folding the bracket to the side of the wheel, firmly press the roller against the disc.
7
Such speedometer can be used both on bicycles and on mopeds. Tests have shown that the accuracy of the device is comparable with the orientation of the poles and stopwatch.
8
The exploitation of such speedometerbut allows you to choose the optimal mode of operation of the engine in transit and the speed of movement.
Tip 9: How to make a speedometer
Speedometer - a device for measuring speed,which keeps you from paying fines for exceeding, from loss of time and nerves. Of course, in the event of a breakdown, it's easiest to get a factory instrument, but you can try to make it yourself.
Instructions
1
Speedometers are divided into two types - mechanical andelectronic. At the heart of the device of the mechanical device for measuring speed is the rotation of the magnetic disk caused by the movement of the transmission. As a result of the action of magnetic fields, an aluminum card is entrained after the disk, but it is held back by a return spring. The stiffness of the spring determines the position of the arrows on the dashboard. Independently to make a mechanical speedometer is almost impossible, as it will be very difficult to achieve the correct readings. Even at factory speedometers the error in measurements reaches 10%.
2
Electronic speedometer basically hasthe meter of the number of pulses coming from the speed sensor. The error is much lower, and you can try to make it at home. You will need a graphic display from an old Nokia mobile phone, LEDs for lighting, a microcontroller, a high-capacity capacitor, low-power resistors, a voltage regulator, a quartz resonator, a trimmer. Details can be purchased at the radio shop.
3
Assemble the circuit of the device. You can find it here:
4
Set the speed sensor and calculatenumber of pulses per kilometer. If you, for example, do a speedometer for a motorcycle, the sensor can be mounted on the wheel. Measure the circumference of the wheel and calculate: one wheel revolution - one pulse from the sensor. If the length of the wheel is 2 meters, then for one kilometer the sensor emits 500 pulses. Program the microcontroller to the desired values and install an electronic speedometer on the dashboard. It can be placed in the body from under the usual mechanical speedometer.
Tip 10: How to twist the electronic speedometer on the WHA
Sometimes there are times when you need to twist the mileage speedometer. This is done in the event that you decide to sell the car. And to make it more attractive to the buyer, you want to reduce the mileage somewhat.
Instructions
1
In order to twist the electronic speedometer,take a screwdriver, wrenches and, if necessary, pliers. First, remove the speedometer from the dashboard. Unscrew the protective glass with a screwdriver, pick up the edge of the speedometer with a screwdriver and pull it toward you. Sooner or later it will completely come out.
2
Then climb inside and unscrew the cable from the boxspeedometer. Take a special cambric and a 12 volt motor. Throw the wires on the battery and select the polarity so that the speedometer is twisted in the direction you need. If the speedometer is not removed, perform all the above actions from the pit where it is installed.
3
In case you yourself could not roll the mileage on speedometer, contact experienced professionals in their field. Benefit now in the domestic market there are many companies that will help you wind an electronic speedometer. Also there are special websites where you will be helped for a small fee. Contact the auto repair shop where you will not only be twisted by a speedometer, but also conduct a complete computer diagnostics of your car. After all, if you are going to sell it, every mechanism and detail of the machine should be in perfect order. A rewind of electronic speedometers will help you to sell the car as profitable as possible.
4
Modern speedometers in cars VAZ are divided into mechanical and electronic. With the twist of the mechanical speedometer, you should not have any problems. There, everything is done simply: just screw the cable in the direction you need. The twist of the electronic speedometer is a much more intellectual and time-consuming task, where without knowing the basics of electrical engineering you will not be able to fulfill all your plans.
- how to twist a run of vases
Tip 11: How to repair a speedometer
Speedometer on cars is set to indicatespeed of movement and to account for the total distance traveled, as well as a certain length of the path. These data are reflected on the indicator located on the instrument panel.
You will need
- Wrenches, screwdriver, grease.
Instructions
1
2
As a result of prolonged use of the carthe grease in the flexible shaft of the speedometer is gradually produced, dries up. In this case, when driving, sometimes even the characteristic shirking noises can be heard - the dry cable rustles. The arrow of the speedometer on the dashboard can brake, twitch, show incorrect values. To fix the defect, lubricate the flexible shaft of the speedometer.
3
4
Pour kerosene into a spacious shallow container and rinse it thoroughly in a flexible shaft and casing, removing all remnants of the hardened old grease. Dry the washed parts.
5
Lubricate the cable-shaft in a 2/3 of its length, counting from the drive side. Insert the cable into the casing and lock it with a lock washer. Install the flexible speedometer shaft into place and tighten the union nuts.
Tip 12: How to adjust the speedometer
Speedometer - an important detail of the machine. Your safety depends on its correct operation. Moreover, the error in the indications can cause fines for excess speed. That this does not happen, it is necessary to be able to correctly adjust this device.
You will need
- - Thin marker;
- - small tweezers or thin scissors.
Instructions
1
Determine which of the two typesspeedometer of your car, having moved its arrow for a mark of 220 km / h. If this division of the scale limits the further course of the pointer, then the instrument with the stop. To adjust such a speedometer, use a thin marker. Fix the arrow in the end position and make a note on the dashboard next to the scale.
2
Carefully remove the arrow, release the latch andmake a complete revolution of the shaft. Without excessive effort, insert the pointer lightly and rotate it easily. Click on the arrow and firmly lock it in its place at the moment when it makes an incomplete turn and reaches the mark made by the marker.
3
Turn the speedometer indicator to the stop andCheck if it matches the mark. In case of error, repeat these steps. Reached the desired result, set the latch and release the arrow.
4
In the speedometer without a stop, the pointer passes through thescale mark of 220 km / h and moves further or falls down. To adjust such a device, move its arrow to 140 km / h. Carefully lift the sticker of the scale from the side of the lock. Use a small pair of tweezers or thin scissors and lightly squeeze the latch.
5
Remove the lock and move the arrow of the speedometerin position "0"; it must fall below the latch hole. Make a mark in front of this place marker, applying it to the instrument panel near the scale. Remove the pointer of the device and release the clamp. Turn the shaft until it is fully turned and adjust it.
6
Slightly insert the arrow and slowly rotate the shaft. When the speedometer indicator coincides with the mark, press it and fix it. Verify the accuracy of the instrument. Pull the arrow in one direction and release it sharply. If it does not match the mark on the scale, repeat the procedure. Having achieved the desired result, move the pointer to the upper position, snap the lock and release the arrow.
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How to make an electronic speedometer? - electronic speedometer circuit
