Hey guys. I was wondering the best Microcontroller to use if the desired function is to drive 2 dc Relays at about 115V at seperate times. I.e there needs to be some logic in here. The DC motors are brushed and have 4 inputs. Variable speed is desired.

Thank you.

 

There is some confusing information here -

desired function is to drive 2 dc Relays at about 115V at seperate times. I.e there needs to be some logic in here. The DC motors are brushed and have 4 inputs. Variable speed is desired.

Can you use DC on the relay coils, and what has this to do with DC motors?

 

There is some confusing information here - Can you use DC on the relay coils, and what has this to do with DC motors?

sorry, I meant to say 2 DC Motors, not relays in the first sentence.

 

<snip>The DC motors are brushed and have 4 inputs. Variable speed is desired.

Thank you.

Are these stepper motors perhaps? (4 Wire Bipolar??) Can You post some pics of the motors?? Post any specs?

B. Morse

 

I don't have a specific motor i would like to drive, i Basically would like to know the most modern and effective way to drive 2 Brushed DC motors with variable speed control.

 

Confgure ur design in such a way that at o/p port of mc you get a speed variation.
at most binary digit ur moter gets highest speed nd at least lowest speed.
And the o/p of port will drive relay(obviously via transistor/fet).

 

The most "modern" way to do it is to use an H-Bridge capable of handling the motor loads, and or FET's, and use PWM to control the speed of the motor....

B. Morse

 

Thanks very much Amit. Bmorse, you have always been extremely helpful. Thank you