Compass Appmod VS Hitachi HM55B Compass Module

varun

Hi

I see two boards on the Parallax site to do compass operations:

1. Compass Appmod http://www.parallax.com/detail.asp?product_id=29113
2. Hitach HM55B Compass Module http://www.parallax.com/detail.asp?product_id=29123

How do both of these differ and for what applications are they recommended??

Right now I am looking forward to finding out how much my robot has moved in each direction say in 2 minutes of its motion!!!

·Can anyone guide me on the adv. and disadv. of using these two boards?

Thanks
Varun
·

Ken Gracey

Varun,

The new Hitachi HM55B obsoloetes the Parallax Compass AppMod. The Parallax version provides eight directions, while the Hitachi version can provide 64-128 directions depending on how it is interfaced to a microcontroller. And it's less than half the price. Both have a serial interface (synch for Parallax; asynch for Hitachi). The size of the Hitachi module is less than 1/10th the size of an AppMod.

Once we're out of stock of our Compass AppMod it will be discontinued. Get the Hitachi version. There's a really cool graphical viewer for the output, too, plus our educational documentation (none of that for the Parallax version). . . . sheesh. . I'd doing a great job selling our stuff!

Ken Gracey
Parallax, Inc.

varun

Hey

Thanks alot for the reply.

And yes, you are doing a splendid job in selling stuff [noparse];)[/noparse] !!!

Varun