[Robotgroup] Motor Controllers and Fuses

[Doug Evans]

Technical term for fuse placed in parallel with the battery: Short Circuit

:)


-----Original Message-----
From: robotgroup-bounces at puremagic.com
[mailto:robotgroup-bounces at puremagic.com] On Behalf Of LHudson
Sent: Wednesday, April 23, 2008 10:43 AM
To: The Robot Group Mailing List
Subject: Re: [Robotgroup] Motor Controllers and Fuses

Very funny.  :D  That made me laugh.  But actually it's more like this:
   
  1.  L298 PCB caught on fire due to Soldering Deficit Syndrome.  It was not
attached to a motor at the time, only to a 6v battery.
   
  2.  Went to Fry's to see if they have comparable dual H-Bridge MC in order
to save $8 on S&H.  Received unsolicited advice from a non-affiliated
pre-teen, who recommended a 5amp slo-blo fuse, connected in Parallel to the
battery.
   
  3.  Asked non-affiliated pre-teen if it should be in Series rather than
Parallel.  He seemed convinced that he was correct.  Asker was not sure
because asker knows very little about electronics (see item 1).
   
  4.  Asked non-affiliated pre-teen if there should be 2.5amp fuses
connected to the motors as well, or only to the MC.  Responder theorized
that three fuses would be better.
   
  5.  Asker came to the realization that although the responder seemed very
bright, TRG would probably have better answers.
   
  
Vern Graner <vern at txis.com> wrote:
  Andre Lamothe wrote:
> can you sum up in a paragraph what the question and problem is exactly on
the table?

Hmm ok, hows this:

Problem:

L298 + advice from Frys employee = "the pcb caught on fire"

Question:

"What went wrong?"

;)

Vern


-- 
Vern Graner CNE/CNA/SSE | "If the network is down, then you're
Senior Systems Engineer | obviously incompetent so why are we
Texas Information Services | paying you? Of course, if the network
http://www.txis.com | is up, then we obviously don't need
Austin Office 512 328-8947 | you, so why are we paying you?" CVLG
_______________________________________________
Robotgroup mailing list
Robotgroup at puremagic.com
http://lists.puremagic.com/cgi-bin/mailman/listinfo/robotgroup


       
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it
now.
_______________________________________________
Robotgroup mailing list
Robotgroup at puremagic.com
http://lists.puremagic.com/cgi-bin/mailman/listinfo/robotgroup