StampWorks Kit
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I bought a StampWorks kit, and I'm working on experiment #1: Flash
an LED. The circuit is a resistor connected to an LED and controlled
by the Basic Stamp. In the StampWorks manual the resistor is shown as
200 ohms, and on the diagram for the NX-1000 board that comes with
the kit the resistor is 220 ohms. But, when I tried to measure the
voltages and current in the circuit, my numbers didn't make sense. I
tried measuring the resistor on the NX-1000 and I'm getting 514 ohms,
which is consistent with my other measurements.
Am I doing something wrong or what happened here?
Confused
an LED. The circuit is a resistor connected to an LED and controlled
by the Basic Stamp. In the StampWorks manual the resistor is shown as
200 ohms, and on the diagram for the NX-1000 board that comes with
the kit the resistor is 220 ohms. But, when I tried to measure the
voltages and current in the circuit, my numbers didn't make sense. I
tried measuring the resistor on the NX-1000 and I'm getting 514 ohms,
which is consistent with my other measurements.
Am I doing something wrong or what happened here?
Confused
Comments
manual -- including the schematics. The resistor values have changed
because we're using lower-current LEDs, and this allows us to safely
light more LEDs with the Stamp.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: steve842us [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=A06G0DTiGELZzXXl7NQhUmnfrSrRUTz_xRal4Nux_qfD-bxAWNcSBHQAZLcIo-l5lnVRdFXABSuSgofG]s.nelick@v...[/url
Sent: Thursday, October 30, 2003 8:50 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] StampWorks Kit
I bought a StampWorks kit, and I'm working on experiment #1: Flash
an LED. The circuit is a resistor connected to an LED and controlled
by the Basic Stamp. In the StampWorks manual the resistor is shown as
200 ohms, and on the diagram for the NX-1000 board that comes with
the kit the resistor is 220 ohms. But, when I tried to measure the
voltages and current in the circuit, my numbers didn't make sense. I
tried measuring the resistor on the NX-1000 and I'm getting 514 ohms,
which is consistent with my other measurements.
Am I doing something wrong or what happened here?
Confused
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wrote:
> After another project is finished I will be updating the StampWorks
> manual -- including the schematics. The resistor values have
changed
> because we're using lower-current LEDs, and this allows us to safely
> light more LEDs with the Stamp.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
As always, Jon is very helpful, but you should be concerned how much
current is coming out of your Stamp first.
I do not know the circuit you are using. I am assuming it is designed
in line with Stamp load driving capabilities.
If you blow the LED you are out of few pennies as compared to few $$
after blowing the Stamp itself or the +5v regulator – mine is gone!
I have not seen anywhere in the documentation if the Stamp output is
overload protected.
Maybe Jon should reply to this question.
Thanks
Vaclav
Project Board which are designed for students. We've sold a lot of
StampWorks kits and individual NX-1000 boards and have never had anyone
blow their Stamp by following any of the experiments.
-- Jon Williams
-- Parallax
Original Message
From: aa7ej [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=CrQhNLcfIp8e7ZNSPk-fg0vnWPvjeXKNEyMC7xv4hxPNkT1PvRzWD6CNoJRuHesszMB3Kt9mxw]aa7ej@y...[/url
Sent: Thursday, October 30, 2003 12:27 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: StampWorks Kit
--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
wrote:
> After another project is finished I will be updating the StampWorks
> manual -- including the schematics. The resistor values have
changed
> because we're using lower-current LEDs, and this allows us to safely
> light more LEDs with the Stamp.
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
As always, Jon is very helpful, but you should be concerned how much
current is coming out of your Stamp first.
I do not know the circuit you are using. I am assuming it is designed
in line with Stamp load driving capabilities.
If you blow the LED you are out of few pennies as compared to few $$
after blowing the Stamp itself or the +5v regulator - mine is gone!
I have not seen anywhere in the documentation if the Stamp output is
overload protected.
Maybe Jon should reply to this question.
Thanks
Vaclav
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.
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This message has been scanned by WebShield. Please report SPAM to
abuse@p....