Fluctuating Output

Fluctuating Output

Hellow Everyone

My project :

input : 5v mq3 sensor
5v flame sensor
5 v piezo disk vibr sensor

ARDUINO UNO

when i m using a 9v battery > 5v Regulator … the mq3 sensor giving varying output 0,1023,345,0,0,0,1023,1023…

i want to power each of them externally via 9v batteries … what is the best way… please help

i want to power each of them externally via 9v batteries .. what is the best way.. please help

Get a switching 5V regulator to generate 5V from from the one 9V battery. You only need one.

i did that .. but the output is fluctuating .. .

u think its a problem of current capacity of the battery?

No I think it is a problem of lack of decoupling of the output. What is your regulator circuit?

http://competefornothing.com/l7805-voltage-regulator-for-arduino-5v-1amp/

this circuit ..

100uf in input and 10uf in output !

pls help

Try adding a 0.1uF ceramic capacitor across each of the large capacitors. That will remove the hgh frequency noises.

in series of both the capacitors ?

No parallel, across.

i cant get . can u help me with a circuit ? pls i m beginner

No I am on a tablet at the moment.

In parallel. Look up parallel capacitors.

okay THnk you :))