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Help me design a 4-motor control board that counts turns and displays it

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tohbas

tohbas

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i must design a motor control board

my board must controls 4 motors and counts (down or up can be programmed by user) them turn and display it


the speed of each motor can be controlled freely

i think i need 4 PWM 4 ADC( to convert voltage in to digital and send to PWM )

which controller has these funtion?

please..
:cry:
 

Re: need some help

DC motor.. just only 24 volts and 3380 round per minute
 

need some help

It would be preferable to use a microcontroller. This is aside form the fact that you want to count the rotations of each motor and display them.
 

Re: need some help

It is simple and possible. It is not clear that you want to rotate them in both the directions.
Assuming the simple unidirection control.

1. You need four port pins of microcontroller to control the on and off of motors. 2. Use MOSFET switches to switch on or off the motor.
3. Use PWM(either software or hardware) to control the speed.
4. Use something like proximity to get counts per turn.
5. By counting the pulses you will come to know number of turns and RPM by simple manipulations.

For bidirectional you need two port pins to control single motor and mosfet bridge if using single supply and 2 mosfets if using dual supply.

Regards
Sarang
 

Re: need some help

I think the best microcontroller for you is ATMEGA48.
It is very cheap. It has ADC. Also it can provide you with 4 8-bit PWM.
ATMEGA48 is the fastest microcontroller now. It even can work on 24Mhz (~24MIPS). But the maximum recommended speed is 20Mhz.
So I recommend you Atmega48
Dmitry B.
 

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