DPRG List  

[DPRG] parts info - motors at the jan meeting

Subject: [DPRG] parts info - motors at the jan meeting
From: . zappepcs at earthlink.net
Date: Sun Jan 11 14:12:01 CST 2004


Seems to be a current limit, the data sheet also says that it has a thermal

-----Original Message-----
>From: Ralph Tenny <rften at swbell.net>
Sent: Jan 11, 2004 11:05 AM
To: "'.'" <zappepcs at earthlink.net>, dprglist at dprg.org
Subject: RE: [DPRG] parts info - motors at the jan meeting

Is that a one amp current limit, or is it heat limited in the case of
driving (for example) 12v motors?

-----Original Message-----
>From: dprglist-admin at dprg.org [mailto:dprglist-admin at dprg.org] On Behalf
Of .
Sent: Saturday, January 10, 2004 9:48 PM
To: dprglist at dprg.org
Subject: [DPRG] parts info - motors at the jan meeting

In case anyone was wondering, some of the motors being sold at the
meeting today had a nice
little circuit board on it with two hall effect transisters and some
other stuff... well that board contains
a motor driver circuit controlled by a PIC16C84. The motor driver is
based on the LM18293 part
which can be configured to support bidirectional control of a dc motor
up to 36v at 1 amp. A very 
nice little circuit. The pic probably just ensures that the motor wipes
back and forth when the shaft
triggers the hall effect transistors, plus moving the blade to the 'not
in use' position.

The size of the motors was exactly the size that you see for small dc
motors everywhere, with the
gearbox bolting on by two screws. The type motor with a metal case at
the shaft end. Any way,
a good deal for 5 bucks. I found the first link while looking for the
specs for the 18293. Hope someone
gets some use out of the info.



DPRGlist mailing list
DPRGlist at dprg.org

More information about the DPRG mailing list