• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

New Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright | Videos 

You are here: Home / Sensors and Detectors / Clap Operated Toy Car Circuit

Clap Operated Toy Car Circuit

Last Updated on July 25, 2019 by Swagatam 9 Comments

In this post we study how to make a simple clap operated toy car circuit using a clap switch circuit and a MIC amplifier, to control its forward and reverse movements,  in response to the claps of the user. The idea was requested by Mr, Zeeshan.

This clap operated toy car is will move in forward or reverse directions every time a clap sound is generated.

Circuit Objectives and Requirements

  1. I urgently need a circuit diagram. I need a circuit of a toy car which goes forward and reverse on the sound of clap.
  2. After switching on, car goes forward ( motor rotate clockwise).
  3. After a clap sound car goes reverse( motor rotate anti clock wise). and vise versa.
  4. In other words, toy motor change it's rotation from clockwise to anti clockwise and vise versa by clap sound. If possible make it using 3 or less pencil aaa cells.
  5. If yes please help me by providing me so.

The Design

The above requested idea of a clap operated toy car circuit can be implemented using the following simple circuit:

Clap Operated Toy Car Circuit
caution electricity can be dangerous

The circuit is made up three basic stages: the MIC amplifier stage, the opamp comparator stage and an IC 4017 based flip flop stage.

The IC 741 is configured as a comparator and together with the IC 4017 it forms a basic clap operated switch circuit.

The BC557/BC547 constitutes the MIC amplifier circuit, we have used two transistors here to make the design highly sensitive to the clap sounds.

Whenever a clap sound or any similar sound is detected by the MIC, it instantly conducts and causes a low signal across its leads enabling the BC557 to trigger.

BC557 triggering forces the BC547 to conduct even harder and in the course brings the pin#2 of IC 741 to ground level or lower than the pin#3 reference pin of the IC. This action enables the opamp output to go high causing a positive trigger for the 4017 input pin#14.

The above functioning forces the IC 4017 to change states across its output pins #2 and pin#3 alternately with every clap sound detection.

The output from the IC 4017 can be seen connected with a relay driver stage consisting of a DPDT relay with its dual contacts configured with the toy car motors, and the supply rails.

The flip flop action from the IC 4017 output toggles the relay contacts across their N/C and N/O points, thereby causing the car motor to correspondingly rotate in cock-wise and anticlockwise directions in response to the subsequent clap sounds, and thus the car is able to move forward or backward accordingly.

In order to make this clap operated toy circuit make sure to wire the indicated relay contacts across both the motors of the car which may be attached at the front of the rear sides of the unit, and must have a gear box configured with the wheels.

You'll also like:

  • 1.  Bipolar Transistor Pin Identifier Circuit
  • 2.  How to Measure Gain (β) of a BJT
  • 3.  3 Stage Timer Circuit for Industrial Camshaft
  • 4.  Wheel Rotation Detector Circuit
  • 5.  How to Make a GHz Microwave Radar Security Alarm Circuit
  • 6.  Linear Hall-Effect Sensor – Working and Application Circuit

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Have Questions? Please Comment below to Solve your Queries! Comments must be Related to the above Topic!!

Subscribe
Notify of
9 Comments
Newest
Oldest
Inline Feedbacks
View all comments


Primary Sidebar

Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (52)
  • 4060 IC Circuits (26)
  • 555 IC Circuits (99)
  • 741 IC Circuits (20)
  • Arduino Engineering Projects (83)
  • Audio and Amplifier Projects (118)
  • Battery Chargers (83)
  • Car and Motorcycle (96)
  • Datasheets (77)
  • Decorative Lighting (Diwali, Christmas) (33)
  • Electronic Components (101)
  • Electronic Devices and Circuit Theory (36)
  • Electronics Tutorial (120)
  • Fish Aquarium (5)
  • Free Energy (34)
  • Fun Projects (14)
  • GSM Projects (9)
  • Health Related (20)
  • Heater Controllers (30)
  • Home Electrical Circuits (106)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LED and Light Effect (95)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (67)
  • Mini Projects (152)
  • Motor Controller (67)
  • MPPT (7)
  • Oscillator Circuits (25)
  • PIR (Passive Infrared) (8)
  • Power Electronics (35)
  • Power Supply Circuits (81)
  • Radio Circuits (10)
  • Remote Control (48)
  • Security and Alarm (64)
  • Sensors and Detectors (127)
  • SG3525 IC (5)
  • Simple Circuits (75)
  • SMPS (29)
  • Solar Controllers (62)
  • Timer and Delay Relay (54)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (41)
  • Ultrasonic Projects (16)
  • Water Level Controller (45)

Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

© 2023 · Swagatam Innovations

wpDiscuz