Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: Coleberbot on June 16, 2009, 05:57:29 PM

Title: Radio remote connected to H Bridge or Servo ?
Post by: Coleberbot on June 16, 2009, 05:57:29 PM

My robot is using a radio remote to control movement and a few other "fun tricks".   I know I can use servos to drive the motors but that would be too easy.

Can the output from the remote receiver be directly connected to an H Bridge then to large DC motors?

I'm not sure what the output is from the receiver (servo square wave?).
  
The other option I think is to use a "servo signal to analog signal converter circuit" and connect it to my AXON and use PWM.

I would be happy to use the servos if they are stong enough,  My robot could be up to 3lbs.  I don't need anything more than walking speed.

Some of the servos I have looked at seem to have a lot of torque, should I just modify them and save myself the hassle?

Title: Re: Radio remote connected to H Bridge or Servo ?
Post by: sonictj on June 16, 2009, 07:02:42 PM

What you need is not simply an h-bridge but an ESC (electronic speed control) these devices are designed for rc and take the servo input to drive dc motors.

Title: Re: Radio remote connected to H Bridge or Servo ?
Post by: Metal Slug 2 on June 16, 2009, 08:05:05 PM

Heres a link for a great deal on some ESC's:

https://www.hobbycity.com/hobbycity/store/uh_listCategoriesAndProducts.asp?catname=All+Speed+Controllers&idCategory=61&ParentCat=182 (https://www.hobbycity.com/hobbycity/store/uh_listCategoriesAndProducts.asp?catname=All+Speed+Controllers&idCategory=61&ParentCat=182)

Title: Re: Radio remote connected to H Bridge or Servo ?
Post by: jamort on June 16, 2009, 10:27:30 PM

That would be to easy.... hmm but theres also the method it doesnt matter if its easy if it gets the job done it gets the job done