Thanks Mike, I'll look into this.
On Thu, Jul 28, 2011 at 7:31 PM, Mike Bushroe [1]mbush...@gmail.com
wrote:
I would use a microcontroller, for instance Atmel ATtiny ( [1]8
pin
version) to replace the relays needed to keep track of 4 states,
and an
[2]L293 dual H-bridge motor driver to drive the two motors in
forward
and reverse directions. You would need 4 pins to control the two
motors
in two directions each, and 1 pin for the momentary contact
switch. If
you wanted two separate momentary contact switches, one start, the
other to return, that would take all 6 I/O pins of the 8 pin chip.
Or
you could get a larger, 20 pin Attiny, or PIC from Microchip, or
an
Arduino or PickAxe or Basic Stamp to use for the controller.
Mike
This is a dumb question but I'm having a mental block.
I have a 12 volt dc motor that I want to run from the push of a
momentary
pushbutton which will run until a limit switch gets hit. Digikey
has
a power
latching relay PB1088-ND (cheap) that I can't tell if it
actually
latches
once energized. (I attached the relay document)
Is relays and switches even the best/cheapest solution?
Suggestions?
Power:
quantity of 2 12 volt batteries available
Input:
momenary 12 volt pushbutton #1
Requirements:
12 volt dc motor #1
12 volt dc motor #2
The application:
Stage 1: momentary signal from pushbutton #1 starts motor #1
that
runs until
a limit switch is hit triggering stage 2
Stage 2: motor #2 runs until another limit switch is hit and
remains
stable
Stage 3: momentary signal from pushbutton #1 reverses the
polarity
of power
to the motor #2 running it until back to it's start position and
triggering
stage 4
Stage 4: reverse of the ploarity of the power to motor #1
running it
until
it is back to the start position
Thanks for any suggestions if non I'll just wing it.
--
Burn the Land, Boil the Sea, You can't take the SKY from me!
References
1.
[2]http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=
ATTINY13A-PU-ND
2.
[3]http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=
497-1389-5-ND
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References
1. mailto:mbush...@gmail.com
2.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=ATTINY13A-PU-ND
3.
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detailname=497-1389-5-ND
4. mailto:geda-user@moria.seul.org
5. http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
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