piclist 1998\10\03\023459a >
Thread: 12C509 to MOSFET H-Bridge ... how to avoid shorts?
face BY : James Cameron email (remove spam text)

I wish to have bi-directional PWM control over a small toy 9V DC motor,
from a PIC 12C509, so I guess I would set up a H-Bridge using four logic
level MOSFETs, but I have a few newbie questions;

a) can I use MOSFETs of the same polarity top and bottom of the bridge?

b) are there any simple tricks I can use to reduce damage in case the
  prototype code manages to switch MOSFETs so as to short the supply?

(This is another Technical Aid to the Disabled project.  For a disabled
child so they can run their toy railroad.  The control unit will receive
a UHF remote control signal as three TTL inputs, a valid transmission
line and two contact closure signals.  One switch will mean go forward,
the other switch go backward, but I don't really want to use relays to
do it; the effect would be far too abrupt.)

James Cameron                                    (KILLspamcameronspamstl.dec.com)
Digital Equipment Corporation (Australia) Pty. Ltd. A.C.N. 000 446 800

<3615B487.9E6C835A@stl.dec.com> 7bit

See also: www.piclist.com/techref/io/motors.htm?key=h%2Dbridge
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) 12C509 to MOSFET H-Bridge ... how to avoid shorts?

month overview.

new search...