The various motor control circuit is already available on the internet and this is also not a new idea for the electronics hobbyist. The circuit of the DC Motor Control Circuit, published here is different from another circuit available for motor control because it let you run a DC motor in a clockwise or anti-clockwise direction and stop it using a single switch. DC motor control circuit has also another advantage i.e. for proper operation of the motor this circuit provides a constant voltage. Here we use three LEDs LED1 through LED3 for indicates that the motor is in stop, forward rotation, and reverse rotation respectively.
Circuit Description of DC Motor Control Circuit
The circuit of DC motor control circuit published here utilizes three-timer IC (IC1, IC3, and IC4) and a decade counter IC2 Â (CD4017). When we press switch SW1 a false trigger is given to pin 2 of IC1 and output is available. To avoid this false triggering IC1 is used here as a monostable multivibrator (timer circuit) for approximately 500 milliseconds (ms).
Initially, the circuit DC motor controller is in reset condition with output at pin 3 of IC2 being high. Since output at pin 2 and 7 of IC2 is low, the output of IC3 and IC4 are high and the motor does not rotate. This condition or stop condition of the motor is indicated by glowing LED1.
When we again press the switch SW1, IC1 provides a clock pulse at pin 14 of IC2 which further advances its output by one, and its high state shifts from pin 3 to pin 2. When pin 2 goes high, the output at pin 3 of IC3 goes low due to the high trigger. The high output at pin 3 of IC4 rotates the motor in a clockwise direction. This state or forward state of the motor is indicated by glowing LED2.
Now one another press on switch SW1 shift high output of pin 2 to pin 4 of IC2, which led motor to stop and is indicated by glowing LED1.
Pressing switch SW1 once again shifts the high output of IC2 from pin 4 to 7. The high output at pin 7 of IC2 makes low output at pin 3 of IC4 which led the motor to rotate in an anti-clockwise (reverse) direction. This condition or reverse running of the motor is indicated by glowing LED3.
If SW1 is pressed again, the high output is sifted from pin 7 to pin 10. Since pin 10 is connected to reset pin 15 of IC2, it reset decade counter CD4017 and made pin 3 high. So the motor does not rotate. LED1 glows via diode D1 to indicate that the motor is in stop condition.
Check out other motor driver and speed controller projects posted on bestengineeringprojects.com
- BLDCÂ Motor Driver Circuit
- AC Motor Speed Controller Circuit Using AT89C51
- Low Voltage Motor Speed Regulator
- 3 Phase Induction Motor Starter
- Automatic Suction Tank Motor Controller
BEP NOTE: For a 6V C motor use a 6V regulated power supply and a 9V DC motor uses a 9V regulated power supply.
PARTS LIST DC MOTOR CONTROL CIRCUIT
|
Resistor (all ¼-watt, ± 5% Carbon) |
|
R1, R6, R7 = 10 KΩ R2 = 47 KΩ R3 – R5 = 680 Ω |
|
Capacitors |
|
C1 = 10 µF, 25V (Electrolytic Capacitor) C2 = 0.01 µF (Ceramic Disc) |
|
Semiconductors |
|
IC1, IC3, IC4 = NE555 (Timer IC) IC2 = CD4017 (Decade Counter IC) D1, D2 = 1N4001 (Rectifier Diode) |
|
Miscellaneous |
|
SW1 = Push-to-on Switch M = 9V DC Motor |
In PARTS LIST what is the value of r3 and r5 plz cnfrm that……….
There is the value of these resistor (680 ohm).
Is circuit for ic3 n ic4 working? Or does it need any change in it? We couldnt get o/p from ic3.
yes IC3 and IC4 is working and used for controlling Motor. Check whether IC3 and IC4 is good or not by using the circuit available at http://bestengineeringprojects.com/555-timer-ic-tester/. and reconnect the entire circuit
Can I get a pcb layout / schematic for this circuit ??