Schematic circuit diagram (wii/wiring diagram) for remote control toy car
Playing cars are controlled by radio signals is an interesting game. The car is much-loved toys of children, with a simple circuit plus this will be the ideal toy car. This series of families use traditional digital CMOS IC which requires very little electrical current, so that does not impose on the performance of the original toy car.
In this system, radio signals transmitted continuously but only raised when the controller sends the command right / left or forward / backward, and even then only a radio frequency discontinuous, so is sending pulses of radio waves frequency.
The number of pulses sent to represent the command is sent, the command FORWARD is represented by 8 pulses, LEFT represented by 16 pulses, 32 pulses RIGHT and DOWN pulses 64. Dikirimk commands can be a combination of 2 very good command, which is a combination of command forward / backward and right / left, for example could be sent forward orders and left all good, in this case the number of pulses sent is 24, ie the sum of the forward command as many as 8 pulses and left the command as much as 16 pulses.
After a command is sent, the system stop sending commands in a certain time interval, the lag time is needed to set the receiver has enough time to properly melaksakan command. Frequency pulses were visible in the right side of pictures number 1.
How to work Transmitter
Radio signals generated by oscillator circuit formed by transistors Q1 9016, operating frequency of the oscillator is determined by the crystal Y1 is worth 27.145 MHz. A very critical part of this oscillator circuit is T1, L1 and L2, which specifically discussed separately at the end of this article.
Working from this oscillator is controlled by NOR gate U2D 14001, when the output gate (pin 3) is worth '1 ', the oscillator will work and send radio frequency 27.145 MHz, and at U2D output value '0' the oscillator will stop working.
U2D NOR gate receives the clock signal from NOR gate U2B. CMOS NOR gate with the aid of resistors R4 and R5 and capacitor C8 form a low frequency circuit forming oscilator clock to control the existing digital circuits. Work from clock generator is controlled through the input leg 6, the circuit will rise if the input clock is berlevel '0 '.
NOR gate U2A and U2C form a latch circuit (RS Flip Flop), because the influence of R2 and the capacitor C11 is fed to pin 9 on U2C, at the time a power supply circuit output U2C must be '1 'and U2A output (pin 3) becomes '0 '. This situation resulted akang U2B clock generator generating clock work and off state 14024th counter reset IC (U1), so that U1 started chopping and 27.145 MHz oscillator circuit sending pulses for generating clock frequency to work.
At the start chopping, all the output of IC in the 14,024 count kedaan '0 ', after chopping the output of 8 pulses Q4 (pin 6) will be a '1', after chopping 16 pulse outputs Q5 (pin 5) to '1 ', after chopping Q6 output pulse 32 (pin 4) to '1 ', after chopping 64 pulse output Q7 (pin 3) to '1'.
Above outputs are used to control voltage U2C by 9 feet diodes D1 and D2, for one value of output is still '0 'then the clock generator U2B is still working, this will continue until dankatode D2 cathode D1 becomes '1' so that the foot 9 U2C to '1 'also. This situation will result in output U2A be 3 feet '1 ', which stopped the clock generator U2B and reset the count was sending 14,024 danberhenti pulse frequency 27,145 MHz.
To generate the lag time for the receiver circuit has enough time carrying out orders, used a series of Q2 9014, a resistor R7 and capacitor C10. The amount of time determined by the size of the gap value of R7 and C10. Switches to send commands ahead / back and to send the command left / right are two separate switches. Each switch has 3 positions, the center position means that the scalar does not send commands.
Recipient workings
Figure 2 is a series of images paired recipients dimobil toy, function receives the signal from the transmitter to control the motor cars, so cars can move forward / backward and left / right. Transistor Q1 with the help of resistors; capacitors and T1 form as a series of radio signal receiver 27.145 MHz. T1 in this series exactly the same as that used in the T1 transmitter circuit, a way of making discussed below.
Following perlangkapannya transistor Q2 to form a series of pulses change the radio frequency received from the transmitter into the box pulses that can be accepted as a digital signal by the CMOS IC. This digital signal will be received as a clock that will be shredded by the IC count 14,024 (U2). The output will be 14,024 according to the number of pulses sent by the transmitter, forward orders and left (which is used as an example in the discussion of the transmitter) is a pulse of 24, the pulse count output of 14,024 resulted in a Q4 = '1 ', Q5 = '1', Q6 = '0 'and Q7 = '0'.
Received digital signal is used as a clock other than the count of 14,024 IC U2 discussed above, also used to drive the 3 pieces of time delay circuit to generate pulses which controls the sequence of work.
The first control pulse will appear after it halted shipments because of the frequency pulse interval time between sending the code, this pulse serves to record the results of the 14024th chopped U3 14,042 (D Flip Flop), so that the final conditions for the 14,024 retained control of the motor. After the results recorded 14,042 to 14,024, 14,042 count reset by the second pulse, so that after passing the lag time can chop 14,042 count from 0 again.
The circuit formed by transistors Q3, Q4, Q7, Q8, Q9 and Q10 is called the H bridge circuit, this circuit is very reliable to drive DC motors. With this series of DC motor can be rotated to the right, the left or to stop motion. The main requirement is the use of this circuit the base voltage Q7 and Q10 base voltage must be opposed, for example, the base Q7 = '1 'and the base of Q10 = '0' the motor rotates to the left, the base Q7 = '0 'and the base of Q10 = '1' the motor will turning to the right, the base Q7 = '0 'and the base of Q10 = '0' the motor to stop motion, but it should not happen the base Q7 = '1 'and the base of Q10 = '1'.
Similarly, Q5, Q6, Q11, Q12, Q13 and Q14 form an H Bridge. H Bridge on the left side of Figure 2 is used to control a motor that regulates movement cars left / right, while the right side of H Bridge used to control a motor that regulates movement forward / backward cars.
Relations between 14,042 and outpur count input 14024th D Flip Flop was constructed so that the signal is fed to each H bridge can not be all '1 'simultaneously.
Schematic circuit wii -wiring diagram diagram for remote control toy car
How to Making way transformer TX and RX
Transformer T1 in the transmitter and receiver circuits, is the same stuff, and have made themselves. Transformer is constructed by using plastic transformer Koker (spare part radio) that has the step that it seems that 5 lines may be filled with rolls of wire, as shown in the photograph. Wearing Koker scrolling makes it easy to wire the transformer. If it can not be Koker like that, just the usual wear. Koker is a small transformer and also feritnya small (3 mm) as she had often used for assembling 27 MHz CB radios.
Wire to the transformer can wear a wire in the loading of Koker, open coil of wire careful existing wires in the Koker because quite smooth and quite easy to break.
Step 1: Roll the wire from a given number of feet to 5 feet 4 in the direction h (CW) 3 rolls just as much at level 1 (line level above the lowest point)
Step 2: Roll the wire from leg 1 to 2 feet in a clockwise direction as much as 4 rolls right on level 2.
Step 3: Continue the roll (from step 2) clockwise a quarter as much as 3 feet away to level 3 in Three. (Can be determined exactly a quarter of the roll, because it has a track kokernya split into 4).
Making coil L1
Roll of copper wire diameter from 0.3 to 0.5 mm by 10 quarter rolls on Koker diameter of about 4 mm (which will be released) is also in a clockwise direction.
Making the coil L2
Roll of copper wire diameter of 0.1 mm to 50 rolls of plastic Koker without ferrite diameter of about 3.5 - 4 mm (for plastic materials from waste materials) are also in a clockwise direction. Long section in embracing the roll along the 5 mm.
