LED bar graph

[Eduardo Gimeno]

At 09:30 28/08/97 -0500, Tom Cloud wrote:
>anyone know a part no. for an LED bar graph that takes 0 to 
>1 volt or such as an input ???  I know they're out there, have
>used them long, long ago .... but now can't find one.  This
>is not a plain bar graph assembly -- it would be an integrated
>circuit voltage/level indicator.
>
>thanks,
>Tom Cloud
>
>       Why don't sheep shrink when they get wet ?
>
>


Most common voltmeter for led is LM3914
Connections are as follows:
Vcc ->Pin 3
Gnd->Pin 2,4,8
Signal to measure->Pin 5
10K var. resistor->Between Pins 6 and 7 (adjust this to make 1 volt max read)
Outputs to Led 1..10->Pins (in order) 1,18,17,16,15,14,13,12,11,10 (pin
1->Led 1, Pin 10->Led 10)

I usually supply it with 5 volts, and I dont remember now if it can be
connected to car battery directly.
(can use a LM7805 as 5volt regulator->Pin 1 is in, pin 2 is gnd and pin 3 is
5v output)


 ================================
|Eduardo Gimeno Gonzalez        |
|mailto://eduardo@ctv.es        |
|mailto://edu@apdo.com          |
|mailto://a920374@zipi.fi.upm.es|
|http://www.ctv.es/USERS/eduardo|
|        Segovia-SPAIN          |
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