Pages: [1]   Go Down
Author Topic: my analog signal very noisy !!  (Read 413 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Full Member
***
Karma: 0
Posts: 109
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

hi ...my analog signal (from sensor) is very sensitive to the noise..i dont want to sample the noise signal ...how to deal with that by
arduino analog inputs? pls help
Logged

Copenhagen / Denmark
Offline Offline
Edison Member
*
Karma: 5
Posts: 2360
Do it !
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

I think we need a little more information

It would help a lot if you told us:

    -what senor it is
    -where the datasheet for it can be found
    -how you hooked it up to your Arduino

And maybe posted your code.
Logged

0
Offline Offline
Shannon Member
****
Karma: 161
Posts: 10431
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Sometimes noise is picked up from nearby wiring, especially when long cable runs are involved - how
long are any cables, are they shielded?
Logged

[ I won't respond to messages, use the forum please ]

Offline Offline
Full Member
***
Karma: 0
Posts: 109
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Right...but i have an other signals interfere with my signals ...i filtered them ..but some times , filter not respond...
so that im asking for solution
Logged

Offline Offline
Edison Member
*
Karma: 116
Posts: 2205
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Sounds like a great random number generator.
Logged

Pittsburgh, PA, USA
Offline Offline
Faraday Member
**
Karma: 58
Posts: 4017
I learn a bit every time I visit the forum.
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Are you reading the same analog pin every time or switching between analog pins?

Filter is not shielded cable. But it is best to keep analog sensor to pins distance short.

Lastly, if you have too much resistor between the analog pin and ground it will take less effect to influence the reads.

Logged

Examples can be found in your IDE.

Left Coast, CA (USA)
Offline Offline
Brattain Member
*****
Karma: 331
Posts: 16514
Measurement changes behavior
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

 A link to your specific sensor may help for a proper answer. The output impedance of the sensors can effect the reading if they are greater then 10K ohms. There are many methods both hardware assisted and software assisted that may be a help in your application, but we need more specific information about the sensor first, possibly a posting of your code and maybe even a drawing of your wiring.

Quality and effectiveness of answers is proportional to the quality and quantity of information you provide.

Lefty
Logged

Pages: [1]   Go Up
Jump to: