Subject:
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Re: NEW POWER SUPPLY
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 14 Oct 1999 20:55:04 GMT
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Original-From:
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Gary Livick <GLIVICK@saynotospamPACBELL.NET>
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Viewed:
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825 times
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This was explained a week or two ago here on the list server. Check back
and you'll find out what traces to cut, etc.
However, I have found another way that is very simple, and does not require
you to make difficult-to-fix cuts on your boards. Just add another 16 pin
socket onto the user area on your expansion board. Remove one of the L293
chips and set it aside. Use 20 ga solid hook-up wire, and take all the
signals, the 5v and ground line from the socket with the removed chip over
to the new socket. You can push the wires into the socket at the old
location, and solder at the other socket. Don't connect the motor leads
from the old socket to the new. Instead, connect the motors you want to
use to the motor output ports on the new socket. Bring the power leads
from your REALLY BIG battery to the new socket, and connect +12 to pin 8
and common to the board common (on the socket). Plug the L293 into the new
socket and hang on, we're goin' places!
I just did this, and it works great. If you have the room for a seperate
board, you can build this up and include a charger plug-in same as what is
on the HandyBoard. That way you can use the HandyBoard charger to charge
your 12 volt gel cell. You can also hang lots of motor-direction LED's and
a charge light if you want.
Total cost is less than two donuts. Time is about two hours to wire up.
Gary Livick
Paul DaCosta wrote:
> I NEED TO KNOW THE EXACT STEPS TO CONNECT A NEW MOTOR POWER SUPPLY TO
> THE HANDYBOARD WHILE IS HAS THE EXTENSION BOARD CONNECTED TO IT.
>
> IT'S TO MY UNDERSTANDING THAT THE EXTENSION BOARD SHARES THE SAME SLOT
> AS THE NEW MOTOR POWER SUPPLY, IS THE ANY DOCUMENTATION UNDER THE
> HANDYBOARD HOMEPAGE THAT WITH DESCRIBE HOW TO DO THIS
>
> THIS PROBLEM SHOULD BE ADDRESSED TO FRED MARTIN, SINCE THE EXTENSION
> BOARD AND NEW MOTOR POWER SUPPLY ARE COMMON ADJUSTMENTS WE ALL ARE FACED
> WITH. MAYBE SOME OFFICIAL DUCUMENTATION SHOULD BE PRINTED UP
>
> THANKS A LOT
>
> BEST REGARDS,
>
> PAUL DACOSTA,
> PROJECT ENGINEER
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Message has 1 Reply:
 | | Re: NEW POWER SUPPLY
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| Great solution Gary! How about just pulling the L293D/SN754410 from the U11 socket, bending pin-8 out and soldering the REALLY BIG battery positive lead to it, then soldering the negative lead to pin-1 without bending it out, and then reinstalling (...) (25 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | NEW POWER SUPPLY
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| I NEED TO KNOW THE EXACT STEPS TO CONNECT A NEW MOTOR POWER SUPPLY TO THE HANDYBOARD WHILE IS HAS THE EXTENSION BOARD CONNECTED TO IT. IT'S TO MY UNDERSTANDING THAT THE EXTENSION BOARD SHARES THE SAME SLOT AS THE NEW MOTOR POWER SUPPLY, IS THE ANY (...) (25 years ago, 14-Oct-99, to lugnet.robotics.handyboard)
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