interfacing dc motor with 8051 - Electronic Circuits Projects Diagrams Free

abbas1707 · 5th March 2007, 05:09 PM

hi
Can any body help me??
i need circuit description for interfacing a dc motor with 8051 uc!

thenewton · 7th March 2007, 06:18 AM

hi aabbas how r u
what u actually wana do to a dc motor by interfacing with microcontroller

ericgibbs · 7th March 2007, 02:05 PM

hi abbas,

What type of motor do you want to interface?

Example: 12Vdc requiring say, 100mA ?

Do you want to control its speed or just stop and start it?

EricG

Muhammad Saeed Anwer · 27th October 2008, 07:43 AM

[quote=ericgibbs;201365],

i want dc motor controlled through 8051.

Example: 12Vdc requiring say, 100mA ?

Do you hav a prj to control its speed or just stop and start it?

silvarblade · 27th October 2008, 09:10 AM

hey!! you have the same name as me

where are you located?

how do you intend to control it?using pwm i guess or you just need to turn it on and off?
OR

this is a hardware question?

ericgibbs · 27th October 2008, 10:29 AM

[quote=Muhammad Saeed Anwer;658932]

Quote:

Originally Posted by ericgibbs

,

i want dc motor controlled through 8051.

Example: 12Vdc requiring say, 100mA ?

Do you hav a prj to control its speed or just stop and start it?

hi,
You should decide on the motor control you require .

Start/Stop is a simple medium power drive transistor, the transistor base being switched by a 8051 output, via a base resistor.

For Start/Stop and simple reversing a 'H-bridge' is normally used, controlled by ON/OFF Fwd/Rev signals from the 8051.

For the above and SPEED control a 'H-bridge' driven by the 8051 using PWM control signals..

Which is it.?

petrv · 27th October 2008, 10:51 AM

Hi Eric,

that is correct, I'd like just to add that if bidirectional control is not needed, a MOSFET transistor can be used. There are "logic-level" N-channel MOSFETs (for example RFP3055LE) that can be controlled directly by a logic output. Simple and better solution than a BJT.

Petr

WizzBall · 28th October 2008, 12:13 AM

Not to hijack this thread, however I have a question that I believe is in line with this topic so I thought I'd ask it here instead of starting a new thread.

What would you recommend for controlling the speed of a higher current DC motor? The motor is a 100W MY68 model (24V and rated for 6A, 2300 rpm) and I would like to be able to reverse the direction of rotation.

I am thinking about using the PWM module on a PIC18F4550 (or any PIC with PWM capabilities for that matter) and a few power Mosfets in an H-bridge configuration. The problem is I believe sizing components carefully so the system is reliable long term and using adequate protection so that I won't have any components die because of excessive current/heat.

fsmyth · 28th October 2008, 05:50 AM

Lots of examples:
Motor, Coil, Relay, and LED Drivers

Muhammad Saeed Anwer · 29th October 2008, 08:53 AM

hi silvarblade!

thanks 4 guiding. i m located at Karachi, Pakistan. what about u?

i need code of this prj but when u insert rpm motor will rotate at this speed? i now about its diagram but problem of its code of controlling the duty cycle which is responsible for increasing the speed of motor.

plz help me.
again thanks to all 4 guiding.

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5th March 2007, 05:09 PM	(permalink)
abbas1707	interfacing dc motor with 8051 hi Can any body help me?? i need circuit description for interfacing a dc motor with 8051 uc!

7th March 2007, 06:18 AM	(permalink)
thenewton	what u wana.... hi aabbas how r u what u actually wana do to a dc motor by interfacing with microcontroller

7th March 2007, 02:05 PM	(permalink)
ericgibbs	hi abbas, What type of motor do you want to interface? Example: 12Vdc requiring say, 100mA ? Do you want to control its speed or just stop and start it? EricG

27th October 2008, 07:43 AM	(permalink)
Muhammad Saeed Anwer	[quote=ericgibbs;201365], i want dc motor controlled through 8051. Example: 12Vdc requiring say, 100mA ? Do you hav a prj to control its speed or just stop and start it?

27th October 2008, 09:10 AM	(permalink)
silvarblade	hey!! you have the same name as me where are you located? how do you intend to control it?using pwm i guess or you just need to turn it on and off? OR this is a hardware question? __________________ i would explain it to you but it would make your brain explode! Last edited by silvarblade; 27th October 2008 at 09:14 AM.

27th October 2008, 10:51 AM	(permalink)
petrv	Hi Eric, that is correct, I'd like just to add that if bidirectional control is not needed, a MOSFET transistor can be used. There are "logic-level" N-channel MOSFETs (for example RFP3055LE) that can be controlled directly by a logic output. Simple and better solution than a BJT. Petr

28th October 2008, 12:13 AM	(permalink)
WizzBall	Not to hijack this thread, however I have a question that I believe is in line with this topic so I thought I'd ask it here instead of starting a new thread. What would you recommend for controlling the speed of a higher current DC motor? The motor is a 100W MY68 model (24V and rated for 6A, 2300 rpm) and I would like to be able to reverse the direction of rotation. I am thinking about using the PWM module on a PIC18F4550 (or any PIC with PWM capabilities for that matter) and a few power Mosfets in an H-bridge configuration. The problem is I believe sizing components carefully so the system is reliable long term and using adequate protection so that I won't have any components die because of excessive current/heat.

28th October 2008, 05:50 AM	(permalink)
fsmyth	Lots of examples: Motor, Coil, Relay, and LED Drivers

29th October 2008, 08:53 AM	(permalink)
Muhammad Saeed Anwer	hi silvarblade! thanks 4 guiding. i m located at Karachi, Pakistan. what about u? i need code of this prj but when u insert rpm motor will rotate at this speed? i now about its diagram but problem of its code of controlling the duty cycle which is responsible for increasing the speed of motor. plz help me. again thanks to all 4 guiding.