7 replies to this topic

[lex]

So I'm relatively new to the wonderful world of "dunios". Kudos to the netduino guys for giving a lonely .NET programmer like myself a way to get into the hobby without having to give up my VS . I finally got the netduino board, and have been messing around with it, cool stuff. My end goal is to drive two big motors on a big robot, but for now, it's more of a proof of concept. i wanted to drive two motors (http://www.sparkfun.com/products/319). To do this I understand that I will need a motor driver shield. When I search for such an item on sparkfun, I only get arduino stuff. I've tried looking through the "compatible shields" on this forum, but didn't find a motor driver shield. Can anyone suggest a shield that is tested and true with the netduino? Thanks Lex

[Philip]

Hi Lex, I would say that most of them would be OK, since the PWM pins are in the same place on Netduino and Arduino. I used one from DFRobots at http://www.dfrobot.c...9&product_id=59 and it works fine. Its good for about 1A, based on L293 PWM driver chip. Good luck, Phil

[Chris Walker]

Hi Lex, Also, please be aware that the Netduino's 32-bit ARM microcontroller only has 4 PWMs (whereas the Arduino's AVR micro has 6). DFRobot is probably a good choice. Just remember that the "outside 2 PWMs" won't be there on Netduino. The good news: all the PWMs on the Netduino are higher-speed and higher-bit. Chris

[lex]

Thanks!

[lex]

Do you think this shield will work with a Servo whose operating voltage is between 4.8-6.0v?

I guess I could always look for a servo that operates in the 3.3v-5v range and plug it directly into the netduino.

Thanks!


EDIT:

I guess I should be more specific, I'm looking to control a servo that can rotate 360 degrees. Has anyone used the Ardumoto shield before?
http://www.sparkfun.com/products/9896

I need to be able to turn the servo in small increments in both directions. This is the servo that I've located.
http://www.sparkfun.com/products/9347

Can these things work together?

Any suggestions would be greatly appreciated.

[lex]

Anyone have suggestions?

[bill.french]

hmmm, i have never used either. 1. I see no reason why that shield would not work wiht a netduino, it's just an h-bridge on a board, as far as I can tell. 2. That servo, though, is 4.8-6v, and the shield takes it's power from Vin, which I think requires 7V, so that might be an issue. ...BUT i don't think you need that shield (or an h-bridge) to drive that servo -- the servo should just take in PWM and power.

[lex]

...BUT i don't think you need that shield (or an h-bridge) to drive that servo -- the servo should just take in PWM and power.

Duh, good point. Thanks for the response.