Cant I get Stable Value in 52AB LM35DZ With Arduino?

[TyCoder1460]

I have 52AB LM35DZ sensor but cant getting stable output value how can I do it?

#define LM35 A0
float temp=0;
void setup() {
  Serial.begin(9600);
}

void loop() {
  temp=analogRead(LM35);
  temp=float(temp *0.488);
  Serial.println(temp);
  delay(500);
}

Project Schema

[ruilviana]

Post project schematic.

[gilshultz]

@TyCoder1460

cant getting stable output value how can I do it?

The first thing I would do is read the data sheet, it explains how to connect it. The data sheet is at: https://www.ti.com/lit/ds/symlink/lm35.pdf
Hint section 7.1 has your answer.

[TyCoder1460]

@gilshultz I look datasheet. not working

[ruilviana]

I set up the same as your project and below are the printouts.
Variations of 0.5 °C.
As written in the datasheet: "0.5°C Ensured Accuracy (at 25°C)"

[anon85221860]

A 0.1uF ("100nF") decoupling capacitor on V-in works wonders.

[TyCoder1460]

the lm35 I use is 52ABLM35DZ. Not only the lm35. @ruilviana When I use only the one that says lm35, the values are as in your screen. I want to know why 52ABLM35DZ is playing like this and what I should do to make it stable.

[TyCoder1460]

@runaway_pancake

A 0.1uF ("100nF") decoupling capacitor on V-in works wonders.

@runaway_pancake I connected V-in 100nF but the situation did not change.

[ruilviana]

@TyCoder1460

the lm35 I use is 52ABLM35DZ. Not only the lm35.

I couldn't find the 52ABLM35DZ datasheet.
Please post 52ABLM35DZ datasheet link.

BTW my sensor is LM35DZ.

[TyCoder1460]

@ruilviana Exactly the same pins and voltages as the lm35 we know, but this is the cheaper version.

[anon85221860]

Then it ain't.

[EmilyJane]

@ruilviana

52ABLM35DZ

There are articles on the Internet that claim that this batch number is mislabeled and it is actually a transistor.

[TyCoder1460]

@EmilyJane

There are articles on the Internet that claim that this batch number is mislabeled and it is actually a transistor.

This has been discussed before, but it didn't work for me.

Problem with temperature sensor reference 52AB LM35DZ

Ron_Blain: Something you may wish to try: float temp; void setup() { // put your setup code here, to run once: Serial.begin(9600); } void loop() {   // put your main code here, to run repeatedly:     temp = analogRead(A1);   temp= temp*(5.0*1000.0/1024.0);   temp= temp/10;   Serial.print("Temperature : ");   Serial.print(temp);   Serial.write(176);   //Serial.print(char(176)); // May also be used.   Serial.print("C ");   Serial.println();   delay(1500);   } Ron Hell…

[EmilyJane]

Well, I'm sorry you are stuck with mislabeled parts. It pays to stick with reliable suppliers.

[ruilviana]

@TyCoder1460

Exactly the same pins and voltages as the lm35 we know, but this is the cheaper version.

Please post 52ABLM35DZ datasheet link.

Or vendor link.

[anon85221860]

Or get out the DMM, select the diode test function, and see if it is a transistor.

[TyCoder1460]

@ruilviana

Please post 52ABLM35DZ datasheet link.

Or vendor link.

@ruilviana https://www.google.com/url?q=https://www.ti.com/lit/ds/symlink/lm35.pdf&sa=U&ved=2ahUKEwjYjITosMuDAxWeevEDHa3YCWwQFnoECAoQAg&usg=AOvVaw3vF9zzqhs93lQ2YHePEXRe

[ruilviana]

This is LM35xx datasheet, not 52ABLM35DZ datasheet.

@EmilyJane

There are articles on the Internet that claim that this batch number is mislabeled and it is actually a transistor.

I think @EmilyJane is correct!!!!!!

Take the test recommended by @runaway_pancake .

@runaway_pancake

Or get out the DMM, select the diode test function, and see if it is a transistor.