Alt-BEAM Archive
Message #06008
To: "beam@sgiblab.sgi.com" beam@sgiblab.sgi.com
From: "Dan Larson" dlarson@citilink.com
Date: Thu, 09 Sep 1999 15:54:15 -0600
Subject: [alt-beam] Re: motor driver: h-bridge or IC?
If you want a real h-bridge for battery powered
applications, get an L293D (SGS Thompson).
It is rated up to 600mA, *dual* hbridge,
and has back emf diodes built in.
There is also the L298N which is good up to 3A.
You can get them at Mouser http://www.mouser.com
for US $2.12 each (The L293)
74HCT245s might be fine for smaller current
motors, but anything bigger cries out for
a real h-bridge chip. Making your own h-bridges
from discrete transistors (I've done it) is
too much trouble.
Dan
On Thu, 09 Sep 1999 14:47:39 -0400, SG wrote:
>Hi all,
>I think one of my 6 transistor h-bridges burned
>out (i hope thats what the problem is anyway)
>and rather than solder some more transitors together, i thought i might try
>two 74HCT245's stacked.
>Does anyone know if this will be enough to power standard servo's?
>Thanks!
>-Sparky
>
>
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