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Remote Control for Toy Car

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    First published on: 5-6-2011

    Remote Control for Toy Car 

    Rohan B. Rebello

    Make any battery-operated toy car remote-controlled using this circuit. The circuit, consisting of an infrared transmitter-receiver pair, uses IR beam transmission to switch the toy car 'on' or 'off '. To operate the toy car, you need to hold the transmitter in your hand, keeping it pointed at the toy car which has the receiver fitted inside, and simply press a switch provided on the transmitter.

    The transmitter works off 9V DC, while the receiver needs 6V DC. Fig. 1 shows the transmitter circuit. It is built around two BC558 transistors (T1 and T2), ,three BC548 transistors (T3, T4 and T5), IR LED1 and a few discrete components.

    Fig. 1: Transmitter circuit

    Fig. 2 shows the receiver circuit. It is built around IR receiver module TSOP1738, two BC548 transistors (T6 and T7) and a few discrete components. In the transmitter circuit, there are two astable multivibrators. The first, built around transistors T1 and T2, produces a frequency of about 1.2 kHz. The second, built around transistors T3 and T4, produces about 38 kHz. IR LED1 is used to transmit the 38kHz frequency.

    Fig. 2: Receiver circuit

    In the receiver circuit, TSOP1738 receives the IR signal transmitted by IR LED1 of the transmitter circuit. The output of TSOP1738 is fed to transistor T6 via diode D1. The amplified signal is further given to relay-driver transistor T7. Relay RL1 energises to control the toy car.

    Working of the circuit is simple. Initially, when no IR beam is falling on sensor TSOP1738, the relay remains de-energised and the toy car doesn't move. When switch S1 is pressed, the IR beam falls on TSOP1738 and its output goes low. Transistor T6 cuts off and transistor T7 conducts to energise relay RL1 and move the toy car.

    Assemble both the circuits on separate PCBs. Enclose the transmitter PCB in a suitable cabinet, with IR LED1 affixed on the front side and switch S1 on the top of the cabinet. Keep the 9V battery inside the cabinet.

    Enclose the receiver PCB inside the toy car, with TSOP1738 fitted such that the transmitted IR beam directly falls on it. Fix switch S2 on the body of the car and the relay inside the car. Use a 6V battery to operate the toy car receiver unit.


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    commentPost Comment | 17 Comments

    mohit   1349 days ago

    hello its only one moter ckt i want a driver ckt for at least 2 moters.
    pradip masurkar   1334 days ago

    is there any circuit which can control atleast 2 motors
    shaipa   1315 days ago

    let me know the clt diag in which tow motors are used n dey can rotate clkwise n anti clkwise
    klns   1181 days ago

    how do you employ the reversing mechanism?
    kundan sen   1158 days ago

    I like it too much
    INFANT   1157 days ago

    nilesh   1152 days ago

    help me out for making mini robot carsmall vehicle using microcontroller
    jagriti   1142 days ago

    can i get d list of components required for making d transmitter n receiver circuits
    commentReply   1 Reply
    akshay   1141 days ago

    just mail me your email id i will give you the details
    commentReply   1 Reply
    akbar   1090 days ago

    dear send the components list to me ppakbarali@gmail.com
    Tanmay Agnihotri   1115 days ago

    please clear that which two wires are actually connected and which are overlapping each other....and there is no capacitor of .01 ohms available in the market
    commentReply   1 Reply
    Efy Admin   1113 days ago

    First part of your query is not clearly understood. If you are talking about the motor supply wires, the two wires can be connected to a 6V or 12V DC source depending on the motor used. Both the values of capacitors C1 and C2 should be read as 0.01uF instead of 0.01-ohm. These values will be corrected very shortly.
    ANKUSH   1115 days ago

    Sir this circuit is for one motor i want to drive two motors either in clockwise and anti clock wise direction please help me ...
    akhil p jacob   1042 days ago

    can you explain how can i modify this circuit for front wheel controls...
    Simardeep Singh   1025 days ago

    i want to operate 2 motors that too both reverse n forward direction.cud any1 pls gimme a list of components required and how to assemblejoin them in a circuit?pls respond at simardeep.mendhiratta@gmail.com
    Natvarlal   1003 days ago

    Superb circuit
    ALBIN MATHEW   622 days ago

    sir i need more information about this project.

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