LED Bargraph?

B

Beowulf

Guest
If I a have a 0 to 5 volt signal coming out of small hand-built gaussmeter
(ok those of you who have read my earlier posts know I built it for
amateur ghosthunting, but I am also seriously interested in learning
electronics, this is getting fun since I used to do it a bit when I was a
teenager), is if hard to somehow eliminate the use of a voltmeter to read
the voltage and somehow add a Bargraph LED to the breadboard circuit so
that the voltage (0-5v) lights up the LED bargraph component?

I just returned from RadioShack where I bought a BASIC Stamp educational
kit, and while there learned of the LED Bargraph electronic component. I
would like to learn how to add it to a circuit as described above.
 
take a look at:

http://www.national.com/pf/LM/LM3915.html



--
Cheers,

Chris Welsh


"Beowulf" <beowulf@nowhere.net> wrote in message
news:pan.2004.02.05.23.21.22.64479@nowhere.net...
If I a have a 0 to 5 volt signal coming out of small hand-built gaussmeter
(ok those of you who have read my earlier posts know I built it for
amateur ghosthunting, but I am also seriously interested in learning
electronics, this is getting fun since I used to do it a bit when I was a
teenager), is if hard to somehow eliminate the use of a voltmeter to read
the voltage and somehow add a Bargraph LED to the breadboard circuit so
that the voltage (0-5v) lights up the LED bargraph component?

I just returned from RadioShack where I bought a BASIC Stamp educational
kit, and while there learned of the LED Bargraph electronic component. I
would like to learn how to add it to a circuit as described above.
Click to expand...
 
Beowulf <beowulf@nowhere.net> writes:
If I a have a 0 to 5 volt signal coming out of small hand-built gaussmeter
(ok those of you who have read my earlier posts know I built it for
amateur ghosthunting, but I am also seriously interested in learning
electronics, this is getting fun since I used to do it a bit when I was a
teenager), is if hard to somehow eliminate the use of a voltmeter to read
the voltage and somehow add a Bargraph LED to the breadboard circuit so
that the voltage (0-5v) lights up the LED bargraph component?
Click to expand...
If the first search term for Google is "schematic" it seems pretty good,
and a "+" tells it you really mean you want that word included.
Try google for
+schematic +lm3914
 
On Fri, 06 Feb 2004 02:42:44 +0000, chris welsh wrote:
http://www.national.com/pf/LM/LM3915.html
Click to expand...
Thank you Chris! Nice lead on a component i think
I will find useful!
 
Beowulf wrote:
If I a have a 0 to 5 volt signal coming out of small hand-built
gaussmeter (ok those of you who have read my earlier posts know I
built it for amateur ghosthunting, but I am also seriously interested
in learning electronics, this is getting fun since I used to do it a
bit when I was a teenager), is if hard to somehow eliminate the use
of a voltmeter to read the voltage and somehow add a Bargraph LED to
the breadboard circuit so that the voltage (0-5v) lights up the LED
bargraph component?

I just returned from RadioShack where I bought a BASIC Stamp
educational kit, and while there learned of the LED Bargraph
electronic component. I would like to learn how to add it to a
circuit as described above.
Click to expand...
have a look at
Beginners and Intermediate Electronics
http://homepage.ntlworld.com/g.knott/elect141.htm
 
On Fri, 06 Feb 2004 12:45:48 +0000, grahamk wrote:
...
have a look at
Beginners and Intermediate Electronics
http://homepage.ntlworld.com/g.knott/elect141.htm
Click to expand...

Nice. Thank you!
 
I saw LM3915 on sale at Electronic Goldmine. http://www.goldmine-elec.com
You may want to give then a try.

--
Dmitri Abaimov
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful online resources for
premises wiring users and professionals
http://www.cabling-design.com/resources/documents/residential.html
Residential Cabling Guide 2003

"Beowulf" <beowulf@nowhere.net> wrote in message
news:pan.2004.02.05.23.21.22.64479@nowhere.net...
If I a have a 0 to 5 volt signal coming out of small hand-built gaussmeter
(ok those of you who have read my earlier posts know I built it for
amateur ghosthunting, but I am also seriously interested in learning
electronics, this is getting fun since I used to do it a bit when I was a
teenager), is if hard to somehow eliminate the use of a voltmeter to read
the voltage and somehow add a Bargraph LED to the breadboard circuit so
that the voltage (0-5v) lights up the LED bargraph component?

I just returned from RadioShack where I bought a BASIC Stamp educational
kit, and while there learned of the LED Bargraph electronic component. I
would like to learn how to add it to a circuit as described above.
Click to expand...
 
Hi,

Although I agree the LM39XX bargraph chips are ideal for your
application, the way I remember it, the LM3915 is internally
calibrated for logarithmic scale (as in LED VU meters); its sibling,
the LM3914 is linear.

Regards,

Anand Dhuru


"Dmitri <Cabling-Design.com>" <info@REMOVE_NO_SPAM_cabling-design.com> wrote in message news:<S3RUb.21684$KV5.20444@nwrdny01.gnilink.net>...
I saw LM3915 on sale at Electronic Goldmine. http://www.goldmine-elec.com
You may want to give then a try.

--
Dmitri Abaimov
http://www.cabling-design.com
Cabling Forum, color codes, pinouts and other useful online resources for
premises wiring users and professionals
http://www.cabling-design.com/resources/documents/residential.html
Residential Cabling Guide 2003

"Beowulf" <beowulf@nowhere.net> wrote in message
news:pan.2004.02.05.23.21.22.64479@nowhere.net...
If I a have a 0 to 5 volt signal coming out of small hand-built gaussmeter
(ok those of you who have read my earlier posts know I built it for
amateur ghosthunting, but I am also seriously interested in learning
electronics, this is getting fun since I used to do it a bit when I was a
teenager), is if hard to somehow eliminate the use of a voltmeter to read
the voltage and somehow add a Bargraph LED to the breadboard circuit so
that the voltage (0-5v) lights up the LED bargraph component?

I just returned from RadioShack where I bought a BASIC Stamp educational
kit, and while there learned of the LED Bargraph electronic component. I
would like to learn how to add it to a circuit as described above.
Click to expand...
 
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