ATTiny2313 and Arduino – Analog Inputs??

im creating a miniature project that works at night , if the LDR detects less than 500 analog input(not sure what this number is. but if i run serial monitor, these are the readings), it will pass through the PIR/Body Sensor, then when the sensor detects movement the LED and Buzzer will turn HIGH. this program works fine in the arduino itself, but when i upload it to the ATTiny2313, it seems that the analog inputs or AnalogRead wont work i guess. When i connect the IC on the 5V power supply, it will automatically turn the LED and the BUZZER, why? my codes attached bellow. Also, i follow the instruction on how to use ATTiny2313 correctly.
See reference:. http://www.instructables.com/id/How-to-Program-ATtiny2313-Current-and-Updated/.

i also connect the pins correctly with analog and digital inputs and outputs. here the link:
http://www.element14.com/community/servlet/Ji...mage/2-50246-76876/ATtiny2313-PIN+MAPPING.PNG

sorry for bad english.
please help me.

Hi Jay,

Can you post the complete circuit design here.

I think you have a problem with the sense Pin connection.

If your LED and Buzzer become active, this means your LDR is shorted or something.

Try to check the LDR and some of the connections.

God Bless.

Best,
Neil

This is my Circuit Connections. assume that the PIC is ATTiny2313.
any ideas whats wrong with my work then??

>Have you tried removing the PIR sensor from the circuit?

>If the same will happen
-try to connect the PIR sensor with the other I/O pins

>If the same will happen
-try to adjust the value assign with the LDR Lower or Higher than 500

or try this
//Define properly the pins
int motionPin = 0; //for PIR
int lightPin = 1; //for LDR
int ledPin = 9; //for LED
int speakerPin = 5; //for LED

//Set the distance variables for motion detection
int lastDist = 0;
int currentDist = 0;

//Set a threshold
int thresh = 150;

void setup()
{
pinMode(ledPin, OUTPUT);
pinMode(speakerPin, OUTPUT);
}

void loop()

{
int lightVal = analogRead(lightPin);
currentDist = analogRead(motionPin);

if(currentDist > lastDist + thresh || currentDist < lastDist - thresh && lightVal < 500)
{
digitalWrite(ledPin, HIGH);
digitalWrite(speakerPin, HIGH);
delay(1000);
}
else
{
digitalWrite(ledPin, LOW);
pinMode(speakerPin, LOW);
}

lastDist = currentDist;
}

Just follow the assigned pinning.

I hope it helps.

Good Luck.

Best,
Neil

ok tnx ill try this . tnx alot.. for helping

Hi Neil

>I tried to remove the PIR sensor. same things happen.
>i tried to connect it from other I/O, still same things happen.
>i tried to change the value of my resistor 220 ohms. still same things..

>i tried your code. and i got these errors:

sketch_jul16a:25: error: stray '' in program
sketch_jul16a.ino: In function 'void loop()':
sketch_jul16a:25: error: expected `)' before 'u2013'

Hi Jay,

I just uploaded the .ino file

Try it again Jay.

The codes are affected by the format of this comment.

Best,
Neil

Hi Neil,

i tried your attached .ino file. it didnt work at all, i even check every single pins, i even change the ATTiny2313 a new 1. but it didnt work.

i wonder if my components affects about the problem.. i have 30kOhms right next to LDR..

Hi Jay,

From your Fritzing Diagram

Aside the Dev kit Uno.

This PICAXE-20M, is this a raw AVR?

Best,
Neil

ihi Neil,

i didnt used PICAXE-20M, i actually used ATTiny2313, because i cant find the ATTINY at the Fritzing software..

> do really ATTINY supported analog signals? thats my last question./.

Jay.

Hi Jay,

The ATTiny2313 AVR does not have ADC.

Therefore the analog pins does not work.

But you can add ADC component to have some analog pins since SPI is available on the ATTiny2313.

However, this will surely affect your design.
-the cost
-the size

Comparing this to atmega that have built in ADC.
-having atmega is much easier.
-the cost between those options basically is not that far.

And I think most of the PIR sensors only requires digital I/O pin.

I think your PIR sensor is requires only digital I/O.
same with this one -> http://playground.arduino.cc/Code/PIRsense

And this "the LDR detects less than 500 analog input(not sure what this number is. but if i run serial monitor, these are the readings)"
-It is a value of voltage in digital bit ( sample 5V using 8 bit 2^8 =256bits therefore 5V=255 starts with 0)


I hope it helps.

God Bless.

Best,
Neil

Hi Neil,

ok,, tnx for the advice. and help..

My gratitude.
Jay