kwh meter counter
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I am a beginner in basic stamps. My question is how to detect a disc in kwh
meter, number of rotation and convert it to cost in seven
segment display.
ronny
meter, number of rotation and convert it to cost in seven
segment display.
ronny
Comments
project. If you must then use an optical sensor. most disk in kwh meter
have holes in the. photodiodes or photo transistors work excellent for
that. just count 1 pulse per revolution. then get a count of revolutions
per 1 kwh. with a little math you can figure the current power in wattage
being used now, per hour, per day. then multiply by $$$ per kwh to figure
the cost.
but there is a better way. its not stamp related but this device does
everything you want and then some. Ever heard of the Kill-a-Watt meter?
plug it in to an outlet and plug in anything into it. it will then measure,
voltage, current, power, power factor, frequency . it will also aid in
calculating the kwh cost. I bought a boat load of them at radio shack but
think they are discontinued now. check around the net. here is one place
that has them.
http://store.yahoo.com/ahernstore/p4400.html
its also fairly easy to take apart and incorporate in your own design which
I have done.
At 07:44 AM 1/1/2004, you wrote:
>I am a beginner in basic stamps. My question is how to detect a disc in
>kwh meter, number of rotation and convert it to cost in seven
>segment display.
>
>ronny
>
>
>
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slot/hole, perhaps using PULSIN would let you get an "instant" power
reading. The hole/slot would allow light to pass from an IR LED to IR
transistor (these come conveniently packaged in a horsehow package) and
give you a pulse out. The width of that pulse would correspond to the
speed of the disc, hence electrical consumption.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: Daryl Berryhill [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=LpoETzfzUDqO8EYZICw8Q5Xl4HVOjnEbJUdRfwdAB3uWhNSbCzi_JIF4yWNPSFL7SlGGKDfOWX9Twvg]djberry@h...[/url
Sent: Thursday, January 01, 2004 10:57 AM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] kwh meter counter
I'm not sure if you have to use the electric companies power meter for
your
project. If you must then use an optical sensor. most disk in kwh meter
have holes in the. photodiodes or photo transistors work excellent for
that. just count 1 pulse per revolution. then get a count of revolutions
per 1 kwh. with a little math you can figure the current power in
wattage
being used now, per hour, per day. then multiply by $$$ per kwh to
figure
the cost.
but there is a better way. its not stamp related but this device does
everything you want and then some. Ever heard of the Kill-a-Watt meter?
plug it in to an outlet and plug in anything into it. it will then
measure,
voltage, current, power, power factor, frequency . it will also aid in
calculating the kwh cost. I bought a boat load of them at radio shack
but
think they are discontinued now. check around the net. here is one place
that has them.
http://store.yahoo.com/ahernstore/p4400.html
its also fairly easy to take apart and incorporate in your own design
which
I have done.
At 07:44 AM 1/1/2004, you wrote:
>I am a beginner in basic stamps. My question is how to detect a disc
>in
>kwh meter, number of rotation and convert it to cost in seven
>segment display.
>
>ronny
>
>
>
>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.
>
>
>Yahoo! Groups Links
>
>To visit your group on the web, go to:
> http://groups.yahoo.com/group/basicstamps/
>
>To unsubscribe from this group, send an email to:
> basicstamps-unsubscribe@yahoogroups.com
>
>Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject
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many of the newer meters (mechnical and electronic) have
a "KYZ" output that outputs pulses you can use. you'd
have to check the pulse weight (talk to the meter technician
at your utility).
pulses give kwh info and you can use that to also determine
kw demand.
some meters may also have KYZ outputs for kwh, kvarh, kvah
too, for active and reactive loads.
mike
--- In basicstamps@yahoogroups.com, Daryl Berryhill <djberry@h...>
wrote:
> I'm not sure if you have to use the electric companies power meter
for your
> project. If you must then use an optical sensor. most disk in kwh
meter
> have holes in the. photodiodes or photo transistors work excellent
for
> that. just count 1 pulse per revolution. then get a count of
revolutions
> per 1 kwh. with a little math you can figure the current power in
wattage
> being used now, per hour, per day. then multiply by $$$ per kwh to
figure
> the cost.
>
> but there is a better way. its not stamp related but this device
does
> everything you want and then some. Ever heard of the Kill-a-Watt
meter?
> plug it in to an outlet and plug in anything into it. it will then
measure,
> voltage, current, power, power factor, frequency . it will also aid
in
> calculating the kwh cost. I bought a boat load of them at radio
shack but
> think they are discontinued now. check around the net. here is one
place
> that has them.
> http://store.yahoo.com/ahernstore/p4400.html
>
> its also fairly easy to take apart and incorporate in your own
design which
> I have done.
>
>
> At 07:44 AM 1/1/2004, you wrote:
> >I am a beginner in basic stamps. My question is how to detect a
disc in
> >kwh meter, number of rotation and convert it to cost in seven
> >segment display.
> >
> >ronny
> >
> >
> >
> >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.
> >
> >
> >Yahoo! Groups Links
> >
> >To visit your group on the web, go to:
> > http://groups.yahoo.com/group/basicstamps/
> >
> >To unsubscribe from this group, send an email to:
> > basicstamps-unsubscribe@yahoogroups.com
> >
> >Your use of Yahoo! Groups is subject to:
> > http://docs.yahoo.com/info/terms/