Off the demo board!
Archiver
Posts: 46,084
I'm about to remove my BS2p24 from the demo board and use it on perf
board for the first time. I know there's a voltage regulator built
into the stamp, but the board externally regulates via an LM2940.
I'm assuming that the regulator is there to provide power to other
accesories such as LCD and the like. I also assume that the stamp is
getting its power from the 5+ volt side of the regulator and not
regulating on it's own. I'm planning on putting the stamp onto a
perf board in a 24 pin socket, soldering up some connections and
hooking up a 9 volt battery. There won't be any other peripherals
using power, the stamp will just be monitoring a serial input and
datalogging it, so I was hoping to not have to order a regulator.
Does this all sound about right? I'd just try it if these stamps
cost $8, but would rather not fry anything... Not much
documentation (none that I could find, anyway) on the parallax site
about making the move from demo boards to the "real world"... Thanks
in advance!
board for the first time. I know there's a voltage regulator built
into the stamp, but the board externally regulates via an LM2940.
I'm assuming that the regulator is there to provide power to other
accesories such as LCD and the like. I also assume that the stamp is
getting its power from the 5+ volt side of the regulator and not
regulating on it's own. I'm planning on putting the stamp onto a
perf board in a 24 pin socket, soldering up some connections and
hooking up a 9 volt battery. There won't be any other peripherals
using power, the stamp will just be monitoring a serial input and
datalogging it, so I was hoping to not have to order a regulator.
Does this all sound about right? I'd just try it if these stamps
cost $8, but would rather not fry anything... Not much
documentation (none that I could find, anyway) on the parallax site
about making the move from demo boards to the "real world"... Thanks
in advance!
Comments
Unless it is an OEM unit, I would not use the Stamp's vreg for anything but
the Stamp. I recently had a problem with an ADC that I was running from the
Stamps Vreg, and it killed the Stamp. Oops!
Jonathan
www.madlabs.info
Original Message
From: "brianr000" <brianr@b...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, September 11, 2003 11:41 AM
Subject: [noparse][[/noparse]basicstamps] Off the demo board!
> I'm about to remove my BS2p24 from the demo board and use it on perf
> board for the first time. I know there's a voltage regulator built
> into the stamp, but the board externally regulates via an LM2940.
> I'm assuming that the regulator is there to provide power to other
> accesories such as LCD and the like. I also assume that the stamp is
> getting its power from the 5+ volt side of the regulator and not
> regulating on it's own. I'm planning on putting the stamp onto a
> perf board in a 24 pin socket, soldering up some connections and
> hooking up a 9 volt battery. There won't be any other peripherals
> using power, the stamp will just be monitoring a serial input and
> datalogging it, so I was hoping to not have to order a regulator.
> Does this all sound about right? I'd just try it if these stamps
> cost $8, but would rather not fry anything... Not much
> documentation (none that I could find, anyway) on the parallax site
> about making the move from demo boards to the "real world"... Thanks
> in advance!
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
onboard regulator. To do this, connect 6 - 12 volts to the Vin pin (24)
of the Stamp.
We don't have any real documentation for moving to the OEM parts save
the schematics. Our thought is that nothing else is required for an
engineer/hobbyist who desires to make that move. That said, Peter
Anderson has some online docs for making a low-cost BS2 with the our OEM
interpreter and some common parts.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: brianr000 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=HGWPFuotr4ZyGYtUHu3ZD3029KcXOV6Fpql7a9-f4FfD4wzhlBFxOlBPVQL7lwimKR-ACD8lGNpK]brianr@b...[/url
Sent: Thursday, September 11, 2003 1:42 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Off the demo board!
I'm about to remove my BS2p24 from the demo board and use it on perf
board for the first time. I know there's a voltage regulator built
into the stamp, but the board externally regulates via an LM2940.
I'm assuming that the regulator is there to provide power to other
accesories such as LCD and the like. I also assume that the stamp is
getting its power from the 5+ volt side of the regulator and not
regulating on it's own. I'm planning on putting the stamp onto a
perf board in a 24 pin socket, soldering up some connections and
hooking up a 9 volt battery. There won't be any other peripherals
using power, the stamp will just be monitoring a serial input and
datalogging it, so I was hoping to not have to order a regulator.
Does this all sound about right? I'd just try it if these stamps
cost $8, but would rather not fry anything... Not much
documentation (none that I could find, anyway) on the parallax site
about making the move from demo boards to the "real world"... Thanks
in advance!
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject
and Body of the message will be ignored.
Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
This message has been scanned by WebShield. Please report SPAM to
abuse@p....
regulator is used to drive the Stamp's +5 volt input.
The Stamp's on-module regulator is not used then.
2. Yes, you can drive the Stamp's Vin pin with 9
volts, and the Stamp's on-module regulator will
provide up to 50 mA. (a few mA for the Stamp itself,
and a few 10's of mA for external circuits, DRIVEN
from the Stamp's +5 volt pin.) Note ONE LED can
take 10 to 15 mA, which would be a large part of
the available current. Note also the Stamp's
pins can source or sink 20 mA each -- but ONLY
if you have the current available.
Note also they do make low-current LED's, which
take 1 to 4 mA -- you may want to use one of these,
blinking periodically, to indicate operation.
3. What kind of interface chip is giving you
your 'serial input'? I havn't looked at the
current requirements of a MAX232 receiver. I
would expect it would be less than 20 mA, but
I don't know. Note RS-485 drivers tend to be
current hogs.
4. If you're logging in, you are probably using
a clock chip. The RTC1302 from Maxim has very
low current in use, even lower current when on
3-volt coin cell, and gives you time-stamps good
to 1 second.
Please keep us informed on your progress, as you
correctly point out, there's not a lot of info
on this configuration available.
--- In basicstamps@yahoogroups.com, "brianr000" <brianr@b...> wrote:
> I'm about to remove my BS2p24 from the demo board and use it on
perf
> board for the first time. I know there's a voltage regulator built
> into the stamp, but the board externally regulates via an LM2940.
> I'm assuming that the regulator is there to provide power to other
> accesories such as LCD and the like. I also assume that the stamp
is
> getting its power from the 5+ volt side of the regulator and not
> regulating on it's own. I'm planning on putting the stamp onto a
> perf board in a 24 pin socket, soldering up some connections and
> hooking up a 9 volt battery. There won't be any other peripherals
> using power, the stamp will just be monitoring a serial input and
> datalogging it, so I was hoping to not have to order a regulator.
> Does this all sound about right? I'd just try it if these stamps
> cost $8, but would rather not fry anything... Not much
> documentation (none that I could find, anyway) on the parallax site
> about making the move from demo boards to the "real world"...
Thanks
> in advance!