To fellow picsters.

I have 32 pieces of a Dallas DS1230Y-70
Non Volatile  SRAM forsale.

These maybe handy for someone who has some existing designs
they need to support. I would like $2.00 each.


Norman



PCS Engineering
Norman Gillaspie
325M Sharon Park Dr. #210
Menlo park, Ca. 94025
Tel 650-854-5263
Fax 650-854-5445
Email norman@pcseng.com


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of w. v. ooijen / f. hanneman
> Sent: Monday, April 12, 1999 1:19 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [ROBOTS] robot lawnmowers
>
>
> > - How should I drive the motors from the PIC?  I had thought of just
> > using MOSFET transistors from Radio Shack (again low cost and locally
> > available).  The cutting motor will be on/off (with probably an external
> > on/off switch as suggested below), and the stepper motors will be
> > controlled by the PIC directly (rather than using a dedicated stepper
> > control IC).
>
> For the stepper you should consider an ULN2803: easier and
> possibly cheaper
> than 8 transistor + diodes etc.
> BUT
>
> > - Any opinions on whether the stepper motors can handle moving around a
> > 5-10 pound platform?
>
> I don't think so, unless you include a gearbox (which you won't find in a
> FDD).
> My dual-FDD-stepper robots have just enough power to move themselves
> around,
> over a smooth surface!
>
> suc6,
>
> Wouter.
>