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LED Bargraph?

B

Beowulf

Jan 1, 1970
0
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.
 
D

Don Taylor

Jan 1, 1970
0
Beowulf said:
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?

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
 
G

grahamk

Jan 1, 1970
0
Beowulf said:
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.

have a look at
Beginners and Intermediate Electronics
http://homepage.ntlworld.com/g.knott/elect141.htm
 
A

Anand Dhuru

Jan 1, 1970
0
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
 
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