This Forum is Dedicated For all The Object Oriented PIC Lovers .......... The concept behind OOPic is straight forward. Use preprogrammed multitasking Objects from a library of highly optimized Objects to do all the work of interacting with the hardware. Then write small scripts in Basic, C, or Java syntax styles to control the Objects. During operation, the Objects run continuously and simultaneously in the background while the scripts run in the foreground telling the objects what to do.

Sunday, December 16, 2007

[oopic] Re: Fried voltage regulator or Cable issue?

--- In oopic@yahoogroups.com, "pcstuck" <pcstuck@...> wrote:
>
> Thank you for the quick response Richard, i really do appreciate it.
>
> Its deinitely is the s-board configuration (
> http://www.oopic.com/connects.htm ), not the r-board, sorry about
> that. The OOPic board is only about 3 weeks old (and since my
> soldering skills arent that great id rather no have to unsolder the
> regulator and solder on a new one already).

The easy way to do this is to cut (or crush) the existing regulator,
heat the pads from the underside and pull the leads out from the top.
Pulling them one at a time is a lot easier than trying to do them all
at once.

You can get Solder-Wick (a braided wire with flux), place it over the
pad and heat with the soldering iron. This will generally remove all
the solder from the pad, leaving the hole unobstructed. I often fill
the hole with solder before trying to remove it. A partially filled
hole is hard to clean out.

Jameco (www.jameco.com) has 5' rolls of desoldering braid such as part
# 139951CB. Unfortunately, these are 5' rolls. I usually buy 50'
rolls! See http://www.jameco.com/Jameco/catalogs/c261/P289.pdf

I use
the smallest size available.

You need a decent soldering iron (I use Hako 936), even a simple one
like the Weller WP-25 Jameco # 170587. See
http://www.jameco.com/Jameco/catalogs/c274/P199.pdf

Look at the
stand/sponge arrangement on the lower left. I have used this type of
setup for many years. I only moved to the Hako when I started messing
around with surface mount devices.

I can see why you would be reluctant to solder on a brand new board.
However, I can't imagine the supplier replacing a board with a fried
voltage regulator as a warranty item.

Jameco also has the voltage regulator for $0.29 #51182. A word of
advice, remove the OOPic and the EEPROM from the board and test the 5V
regulator after replacement. Be sure you note the orientation of the
chips and don't bend any pins when you replace the OOPic (a lot easier
to write about than to accomplish).

You aren't the first to fry this regulator. It happens all the time.
Not to me, of course...

Anyway, sooner or later, you need to become an expert at soldering.
It might as well be sooner.

Richard



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