When you need to be able to reverse the DC motor then the complexity of a H-bridge is needed. When all you need to do is control the motor or even PWM it then there's this wonderful 3-pin IC called a "MOSFET". Yeah, and what's more, they are usually rated to handle many 10's of amps so that motor stall should never be a problem. You can even drive them from 3.3V with only a single I/O.
Ok, sounds over the top maybe? But it's true and it is exactly what I would use. Why use a space pen when a pencil will do?
For those of you wandering through this thread looking for suggestions and examples of DC motor control using a Basic Stamp or Propeller, do have a look at the Nuts and Volts columns, particularly Vol 1, #23. This is a long-running series of columns in Nuts and Volts magazine most by JonnyMac on a variety of topics, complete with easy to understand discussions and explanations and practical examples.
Comments
Ok, sounds over the top maybe? But it's true and it is exactly what I would use. Why use a space pen when a pencil will do?
Thank you all
Here is the article.
https://electrosome.com/dc-motor-l293d-pic-microcontroller/
You just replace that micro with a Stamp (BS1 to BS2p40) or Propeller.
The article is the level of this forum.
So. That is how to connect Parallax micro to DC motor.
There may still be a Parallax article or Nuts and Volts or Application Note out there somewhere like it.
Happy holiday! 14 days til Christmas!
How hard is it to connect the 2 wires of a DC motor?
I've not seen you follow through on any of your "problems".
Maybe you just like creating a stir?
I could be wrong but moderators please take note.
Happy holiday!
Thank you for that.
Will connect up some of this stuff.
Using a 4.5 volt 3 AA battery box to power motor.
It's a motor on a Tamiya wheel ratio kit. Turns some different diameter wheels with rubber bands for belts.
No 'belts' on it.
Happy holidays!
I thought you wanted to know how to connect 2 motors to an L293D and I have seen much better tutorials than the one you linked to.
https://itp.nyu.edu/physcomp/labs/motors-and-transistors/dc-motor-control-using-an-h-bridge/
Mike,
That's a good article and it even has something for Erco (controlling 2 motors with relays through a ULN2003).
Thank you Mike
There we go a Nuts and Volts article on it. Suspected there was one out there.
Probably an application note too.
Thank you Genetix
"I thought you wanted to know how to connect 2 motors to an L293D"
Not me. That would be like saying I wanted to hook up four because I looked at ULN2003 first.
Nope. Just one motor.
I do not think there is an IC for just one motor.
The L293D just throws in a circuit for extra motor. That was a common sense thing to do.
Happy holidays!
Here is the L293D in a nutshell.