How to make a small remote controlled car? What is the basic structure of a RC car? How to Retrofit

The first is the circuit problem, to be honest, the part of the remote control car involving the circuit is the remote control part, it is recommended not to make it yourself, the production of this part requires a certain knowledge of radio and electricity, and it is easy to have frequency interference problems by yourself, and the most important thing is that the remote control transceiver equipment you do is impossible to make the kind of highly integrated circuit that you buy, it is recommended to buy.

As the skeleton of the car, the turf is an important part second only to the engine, which is directly related to whether the parts of the remote control car you make can be closely combined to achieve the most perfect power transmission and avoid unnecessary wear and tear between the components. To make a site, you must first determine the model you want, the size of the parts you intend to use, and a series of other conditions. Do not weld parts (engine, front and rear drive shafts, etc.) to the ground, first of all, it is not easy to maintain, and then there is no way to adjust it later.

Fix the required parts to the floor with screws. By the way, let's talk about the thickness of the site, let's use four (4mm) thick steel plates.

Next is the engine, the self-made engine is super complicated, because the engine of the transmission is poured out in one piece. Moreover, there are strict requirements for the contact between cylinders, pistons, radiators, spark plugs, and exhaust pipes, because the diesel car uses a compression-ignition internal combustion engine (there is no spark plug like an EFI car that is electrically ignited every time it rotates, and the spark plug is only used for a moment when it is on the car, similar to a diesel car, by the way, a novice who has just come into contact, the life of the spark plug is not long). As for the tires, the wheels are made of plastic, which can reduce the weight of the body.

Aluminum alloys are also OK. There are many articles on the front and rear axles, such as the shock absorption system, which is mainly decided by the model (off-road or flat-running). However, whether it is off-road or flat running, it is a quadrilateral movable support frame, and the shock absorption is generally reduced by spring with hydraulic cushioning.

After the shock absorption, come to the power part of the transmission, the use of the lowest gear direct occlusion transmission is no problem, but when the shock absorption is effective, there will be uneven speed, the front and rear axles must be equipped with differentials, the quality of the differential directly determines the power distribution on the left and right wheels of the car.

Finally, braking, the braking force is average, and the brake disc is generally installed on the central shaft. It is connected to the controller that controls the throttle.

Masters are everywhere hehe, but no, the current society can only bury ...... talentsRemote control cars do do, and there are many, many models that can be remote controlled now To put it bluntly, as long as it is modified, any car can be remotely controlled, but it is far from being as simple as it is said upstairs. First of all, the gearbox of the vehicle should be controlled by remote control, that is, the gearbox should have a motor, signal reception, etc., and secondly, the accelerator pedal should also be controlled by remote control, which can be a motor or an electromagnet, of course, it is also necessary to receive a signal, third, the brake electronic control should also receive a signal, and there must also be a motor and an electromagnet, fourth, the direction control should also have a motor, signal reception and feedback, and fifth, the signal light control system (headlights, turn signals, fog lights...).Sixth, vehicle dynamic information feedback (such as probes), and seventh, radar cruise .........The above is simplified and explained in the simplest and most understandable way, if you really want to do it, it is far from being as simple as the above, for example, how can you do so many of the above operations at the same time on a small remote control? However, many remote-controlled cars have been manufactured abroad, and even the sturdy Hummer H2 has a remote-controlled version However, this is not high-tech at all, it is completely mechanized, and it has been there many years ago Now scientific development has been in the bottleneck stage

Infrared remote control is currently the most widely used remote control means. The infrared remote control device has the characteristics of small size, low power consumption, strong function and low cost. and other small electrical devices such as toys have also adopted infrared remote control.

Principle analysis of the encoding rules of remote control instructions sent by the remote control.

How small is the model, the German kind of 87 scale?

If you want to do it yourself, it's best to ask the owner of the shop that sells the parts. The average boss will know a thing or two!

Do you want to do electric or engine,**There are a lot of kits on it,If you just start to get started, you can start with the electric one, you can also go to the model professional**Learn about it.。

Generally, it is controlled by ultraviolet rays, and the trajectory of the car can be controlled by the way of quiet remote control, and the style diagram of the transformation should be determined in advance to understand the basic structure. Never harm the overall structure.

It mainly uses the motor to drive the wheels, which can be transformed faster.

To convert ordinary toy cars to remote control cars, first of all, the gears of the vehicle should be remotely controlled, that is, the gears should have motors, signal reception, and so on.

Secondly, the accelerator pedal should also be controlled remotely, which can be a motor or an electromagnet, of course, it also needs to receive signals, brake electronic control, but also to receive signals, and there must also be motors, electromagnets, and direction control should also have motors, signal reception and feedback, signal light control systems (headlights, turn signals, fog lights...).), feedback within vehicle dynamics (e.g. probe), radar cruise.

The principle of remote control of remote control of remote control car.

The remote control is mainly composed of a microprocessor chip that forms a remote control signal, a crystal oscillator, an amplification transistor, an infrared light-emitting diode, and a keyboard matrix.

The working principle is as follows: the oscillator inside the microprocessor chip IC1 forms a high-frequency oscillator through the feet and the external oscillating crystal X to generate a high-frequency oscillation signal (480kHz).

This signal is fed into the timing signal generator and generates a 40kHz sinusoidal signal and a timing pulse signal. The sinusoidal signal is fed into the coded modulator as a carrier signal; Timed pulse signals are sent to sweep signal generators, keyed input encoders, and instruction encoders as time standard signals for these circuits.

The scan signal generator inside IC1 generates five scan pulse signals at different times, which are sent to the keyboard matrix circuit by 5 9 pin outputs. When a certain key is pressed, the control signal corresponding to the function button is input to the keyed encoder by 10 14 pins respectively, and the digital signal of the corresponding function is output.

Then the instruction code signal is output by the encoder, and the modulator modulates on the carrier signal to form a high-frequency pulse train containing functional information, and the output of 17 pins is amplified by the transistor BG, and the infrared light-emitting diode D is promoted to emit a pulse modulation signal.

The remote control sends out a signal, which is received through the antenna, because the metal is the conductor, plus the receiver's transistor amplifies the signal. Use the servo, ESC, etc. to make the toy receive the signal. Ask what you're going to change?

The circuit of the toy car is not something that ordinary people can change casually, you go and buy a 30 yuan remote control car, remove the circuit board and then press it into it with a battery. However, it requires strong hands-on ability. If there's anything you can't ask, I've made 3 cars myself. Hehe.

My remote control car, lent out, planted broken, the ground has been repaired, now it's the remote control and the remote control car, they can't connect, what's going on?

Tool Material:

Trolley parameters:

5 control keys, 4 DC motors, L293D motor drive module, 1 battery, body chassis.

Steps:

Required Artifacts:

4 DC motors, L293D motor drive module, 1 battery, body chassis.

1. First of all, fix the motor to the chassis.

2. Let's talk about the use of the L293D module in detail

L293D is a special motor driver IC, the working voltage is 5V, the drive voltage input can reach 36V, the output current is plus or minus 600mA, and there are 4 control terminals and 4 output terminals.

where a is the output control end, y is the output control end, and 1a is the control 1y.

By analogy, 1,2EN 3,4EN needs to be shorted, and the maximum working voltage of the chip shall not exceed 7V.

Package Drawing:

VCC1 is connected to the working voltage, 5V, and VCC2 is connected to the driving power supply of the motor.

Generally speaking, this voltage is higher than 5V, if you are using a 12V battery, you can connect the positive pole of 12V to VCC2.

The power supply of chips, single-chip microcomputers and batteries needs to be co-grounded, and the control part of single-chip microcomputer is 5V to completely separate the power supply, and the positive electrode is completely independent, but the GND (negative electrode) must be connected together.

3. The connection between the L293D motor driver chip and the motor:

Example: Left front and rear wheels:

1Y is connected to the red line of the motor, 2Y is connected to the black wire of the motor, and the left front wheel motor.

3Y is connected to the red line of the motor, 4Y is connected to the black wire of the motor, and the motor of the rear wheel on the left.

Forward command: 1a=1 (output 12V), 2a=0 (output 0V), 3a=1 (output 12V), 4A=0 (output 0V).

Backward command: 1a=0 (output 12V), 2A=1 (output 0V), 3a=0 (output 12V), 4a=1 (output 0V).

The connection on the right and on the left is exactly the same.

Note:

Forward and backward are not absolute.

Because it is a DC motor, it does not deliberately emphasize the positive and negative poles.

However, it is necessary to ensure the uniformity of the motor wiring, the front wheel is connected to the clockwise sequence, and the rear wheel is counterclockwise.

4. The rotation mode of the trolley:

Forward and backward is the forward and reverse rotation of the four motors at the same time.

There are 2 ways to turn left and have a turn:

A rotates while not turning, B rotates forward and reversely.

Each of these has its own benefit, and you can determine the way to turn according to your actual situation.

The chassis effect of different cars is definitely different, and the way of turning is controlled by the program, and this program is the B way.

Aim the remote control at the remote control receiver next to the main control switch of the power window, and within 1-4s, press the unlock button of the remote control and press the lock button.

Make sure you can hear the sound of the door lock actuator, and press the unlocking button of the remote control again within 1-4s.

Within 10s, store up to 2 more of the remote control you need to store in the remote control receiver, aim at the receiver, and then press the unlocking button of the remote control. After each remote control is stored in code, it must be confirmed that the sound of the door lock actuator can be heard.

Turn the ignition to OFF and pull out the key.

Confirm that the remote control can be operated normally.

The materials needed to make the grip for the remote control car: glue, a carbon brush motor, an ordinary motor, a neutral pen refill, an axle, a wheel, a signal transmitter, a signal receiver, a wooden board for the battery box (with a switch), a pulley, and a rubber band.

In the first step, make the wheel steering, glue the gel refill to the motor, and glue the motor to the front of the board.

In the second step, the power system is made, and the ballpoint pen refill is glued to the back of the board, and the motor is glued to the board.

The third step is to connect the signal receiving board, the yellow and green wires are the ones that control the forward and reverse rotation of the motor, and the red and black wires are the power lines.

Fourth, the battery box and the position of the motor are slightly changed.

The fifth step, test the car, control the remote control button, confirm that the wiring is correct, it is best to use cardboard or other materials as a shell, conditionally, frame, axle, and other things can be improved.

How to choose a RC car

1. It is very important to choose a good hail skin type fruit with a good binding effect of the whole vehicle, so that the parts are glued together, so that it is not easy to separate, and it also reduces the danger of children swallowing parts.

2. Choose a solid and durable, simple one that can be operated, children do not know how to protect, and they are most likely to lose their temper and be easily damaged by cumbersome operations.

3. It is best to choose the use of batteries, the source guessing parts of charging are too cumbersome and easy to damage, and it is easy to cause danger when children take it when charging.

4. There must be additional product manuals and manufacturers and related certifications, mainly because many products are made of ** waste, which is not harmful to the health of children.