In this 555 timer project, I have shown how to make speed control of DC motor using PWM with a 555 timer IC circuit. You can control the speed of any DC motors like 775 or 555 motors with this 555 timer circuit.
This 555 timer circuit also can be use as the LED dimmer circuit
Circuit of PWM motor speed control
The circuit is very simple, I have used 555 IC and some basic electronics components to make this speed control of dc motor using PWM.
Here I have used TIP122 NPN power transistor, but you can also use IRFZ44N mosfet.
The collector current of the transistor or drain current of the MOSFET should be greater than the DC motor MAX current rating.
PCB Layout for PWM 555 Timer circuit
Please download the PCB layout, then print it on the A4 page.
Please check the PCB size while printing, it should be the same as mentioned
- 555 Timer IC
- TIP122 NPN transistor (You can also use MOSFET IRFZ44N)
- 1N4007 diodes (3no)
- 5-mm LED
- 1k 0.25-watt Resistors (3no)
- 10k 0.25-watt Resistors (1no)
- 100k Potentiometer (1no)
- 100nF Capacitor (C2) (1no)
- 10nF Capacitor (C1) (1no)
- Zero PCB or cardboard
Tutorial Video on PWM Speed Control
In this tutorial video, I have shown all the steps to make the speed control of dc motor using pwm with 555 timer circuit.
So please watch the complete video for better understanding.
How to make 555 timer circuit on PCB
Time needed: 1 hour.
Steps for making the volt level indicator circuit on PCB:
- Print the PCB Layout and stick it on Acrylic sheet or cardboard
While printing please check the PCB dimension mentioned in the PCB layout
- Drill the holes for the components on the PCB
Here I have used 1-mm drill bit for drilling on PCB.
- Place the components as shown on the PCB layout
Place all the components on the PCB as shown on the layout.
- Connect all components as shown on the PCB Layout.
Here I have use the leads of components.
- Solder all the components on PCB
- The PCB for PWM 555 Timer circuit is ready.
Connect the DC Motor
Connect any DC motor and give the 12 Volt DC supply at input.
Now you can easily control the speed of the DC motor by rotating the potentiometer.
As this circuit use PWM, so this is also energy efficient.
LED Dimmer with 555 circuit
You can also use this circuit as LED dimmer to control the brightness of LED lights.
Please share your feedback on this mini-project and also let me know if you have any queries.
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I hope you have liked this electronics project, Thank you for your time.