Problems with the L298 Motor Driver Kit ?
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Posts: 46,084
I was looking for solutions to drive 2 DC motors that can be
controlled with a basic stamp 2. I bought 2 - L298 Motor Driver Kit
from HWV. It is working fine for 1 or 2 hours(i am controlling little
robots with to wheels) and then the chip burns... My 12vdc motors do
not run for more then 1 Amp...
I tried many things it always end the same way !!
Do anyone had the same problem? any solutions or tips?
Do anyone have another solutions (with explicit diagrams!) to drive
two DC motors with a basic stamp? I need something that can handle
runing for 6 to 8 hours continuously going back and forth...
Artist stuff !!! [noparse]:)[/noparse]
Merci
TANKS
St
controlled with a basic stamp 2. I bought 2 - L298 Motor Driver Kit
from HWV. It is working fine for 1 or 2 hours(i am controlling little
robots with to wheels) and then the chip burns... My 12vdc motors do
not run for more then 1 Amp...
I tried many things it always end the same way !!
Do anyone had the same problem? any solutions or tips?
Do anyone have another solutions (with explicit diagrams!) to drive
two DC motors with a basic stamp? I need something that can handle
runing for 6 to 8 hours continuously going back and forth...
Artist stuff !!! [noparse]:)[/noparse]
Merci
TANKS
St
Comments
>I was looking for solutions to drive 2 DC motors that can be
>controlled with a basic stamp 2. I bought 2 - L298 Motor Driver Kit
>from HWV. It is working fine for 1 or 2 hours(i am controlling little
>robots with to wheels) and then the chip burns... My 12vdc motors do
>not run for more then 1 Amp...
>
>I tried many things it always end the same way !!
>
>Do anyone had the same problem? any solutions or tips?
>
>Do anyone have another solutions (with explicit diagrams!) to drive
>two DC motors with a basic stamp? I need something that can handle
>runing for 6 to 8 hours continuously going back and forth...
When driving inductive loads clamping diodes at the outputs of the LM298
are a good idea (are necessary!) to prevent spikes from destroying the chip.
Do a Google search for LM298 and you'll find a spec sheet with schematics.
If that isn't the solution, I have no idea.
Jim H
best bet is to contact us directly at support@H... or by phone at
(403)730-8603 for immediate help you with yourr problem.
> I was looking for solutions to drive 2 DC motors that can be
> controlled with a basic stamp 2. I bought 2 - L298 Motor Driver Kit
> from HWV. It is working fine for 1 or 2 hours(i am controlling little
> robots with to wheels) and then the chip burns... My 12vdc motors do
> not run for more then 1 Amp...
They probably only draw 1 amp when unloaded but if your robot gets stuck
and the wheel is held in place (i.e. "stalled") then it will draw MUCH more
(possibly 4 amps or more) which can destroy the chip. When selecting a
motor driver, you must know all the parameters of the motor in question -
particularly the stall current (you can find this by measuring the DC
resistance of the motor winding and dividing the battery voltage by this
resistance to get current in amps).
> I tried many things it always end the same way !!
>
> Do anyone had the same problem? any solutions or tips?
>
> Do anyone have another solutions (with explicit diagrams!) to drive
> two DC motors with a basic stamp? I need something that can handle
> runing for 6 to 8 hours continuously going back and forth...
Assuming that your motors don't draw too much current, then the L298 kit is
exactly what you need. If you will be running it for long periods then you
should consult the manual section on adding a heatsink to the L298.
Mark Hillier, VE6HVW
President, HVW Technologies Inc.
Canadian Distributors of Parallax Products and other Neat Stuff
Tel: (403)-730-8603 Fax: (403)-730-8903
See our NEW FPGA Experimenter Board
http://www.hvwtech.com/intro-fpga.htm
for several years without a single failure, and i was wired exactly as the
schematics showed.
norm
>From: "hexagramuqam" <hexagramuqam@y...>
>Reply-To: basicstamps@yahoogroups.com
>To: basicstamps@yahoogroups.com
>Subject: [noparse][[/noparse]basicstamps] Problems with the L298 Motor Driver Kit ?
>Date: Mon, 03 Jun 2002 17:07:23 -0000
>
>I was looking for solutions to drive 2 DC motors that can be
>controlled with a basic stamp 2. I bought 2 - L298 Motor Driver Kit
>from HWV. It is working fine for 1 or 2 hours(i am controlling little
>robots with to wheels) and then the chip burns... My 12vdc motors do
>not run for more then 1 Amp...
>
>I tried many things it always end the same way !!
>
>Do anyone had the same problem? any solutions or tips?
>
>Do anyone have another solutions (with explicit diagrams!) to drive
>two DC motors with a basic stamp? I need something that can handle
>runing for 6 to 8 hours continuously going back and forth...
>
>Artist stuff !!! [noparse]:)[/noparse]
>
>Merci
>TANKS
>
>St
> from HWV. It is working fine for 1 or 2 hours(i am controlling
little
> robots with to wheels) and then the chip burns... My 12vdc motors
Add some big heat sinks. Makes a huge difference.