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How to run my atmega 328 chip from 4 AAA batteries?

Former Member

Hello,

 

Im currently working on my first real noobish project, its a temp/moisture sensor for my brother for his organic garden,

i have all my leds and 330 resitors soldered on, but i need to know waht componets i need to take 4 AAA batteries and power my chip without the Arduino,

everything can fit into the container i want it in (an altoid can) but i need to know what resistors/capactors or regukaters i need ino order to safely run my hardware.

 

also what ways can i use my multimeter so i can measure the volts and amps, so i can calculate how long the batteries would power the device.

I hear alot of great things about the element 14 community and i cant wait to hear what you guys have to say image

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  • 0

    Hi there, nice to have you aboard

     

    first things first

     

    Can you draw up a sketch of what you envision , on paper then a cell phone picture if necessary but layout what your trying to do showing all the various components, battery, sensors, led outputs, displays, micro-controller etc

     

    You say without an Arduino, what do you mean by that, are you going old school analogue or digital or still keeping a microcontroller in the system

     

    is that a count of 330 resistors or a resistor of 330 Ohms ?, how many LEDs, how are you sensing or planning to sense temp and humidity, see if you can show this in your diagram

     

    Then we can be better prepared to help

     

    Thanks and look forward to your response

     

    Peter

  • 0 in reply to Robert Peter Oakes

    hey ive been busy ill give you all info and pics in a few days so you can help me out, just had a long 50 hour work week and it ate all of my free time up.

  • 0 in reply to Robert Peter Oakes

    ,here is my setup, and i want to power the chip with just 3- 4 AAA batterys

    imageimageimage

     

    Here is my code :

     

    int soundPin  = 2;

    int ledPwerPin  = 6;

    int ledAlrm1Pin  = 12;

    int ledAlrm2Pin  = 13;

    int ledTempPin [] = {7,8,9,10,11};

    const int tempPin  = 0;

     

     

    void setup() {

      // put your setup code here, to run once:

      pinMode(soundPin, OUTPUT);

      pinMode(ledAlrm1Pin, OUTPUT);

     

      pinMode(ledAlrm2Pin, OUTPUT);

       pinMode(ledPwerPin, OUTPUT);

      pinMode(ledTempPin[0], OUTPUT);

      pinMode(ledTempPin[1], OUTPUT);

      pinMode(ledTempPin[2], OUTPUT);

      pinMode(ledTempPin[3], OUTPUT);

      pinMode(ledTempPin[4], OUTPUT);

     

      Serial.begin(9600);

    }

     

     

    int alarmSpeed = 9;

    int waitPerphMode = false;

     

     

    //////main process

     

     

    void loop() {

     

     

    float voltage, degreesC, degreesF;

     

     

    digitalWrite(ledPwerPin, HIGH  ) ;

     

     

    voltage = getVoltage(tempPin);

    degreesC = (voltage - 0.604) * 100.0;

    degreesF = degreesC * (9.0/5.0) + 32.0;

     

     

     

     

    if (degreesF > 100 && degreesF <= 105 ) { alarm1(); }

        else if (degreesF > 102) { noPerph(); }

     

     

    if (degreesF > 16.6) { digitalWrite(ledTempPin[0],HIGH ); }

        if (degreesF < 16.6) { digitalWrite(ledTempPin[0],LOW ); }

    if (degreesF > 33.2) { digitalWrite(ledTempPin[1],HIGH ); }

        if (degreesF < 33.2) { digitalWrite(ledTempPin[1],LOW ); }

    if (degreesF > 49.8) { digitalWrite(ledTempPin[2],HIGH ); }

        if (degreesF < 49.8) { digitalWrite(ledTempPin[2],LOW ); }

    if (degreesF > 66.4) { digitalWrite(ledTempPin[3],HIGH ); }

        if (degreesF < 66.4) { digitalWrite(ledTempPin[3],LOW ); }

    if (degreesF > 83) { digitalWrite(ledTempPin[4],HIGH ); }

      if (degreesF < 83) { digitalWrite(ledTempPin[4],LOW ); }

     

     

     

      

    if (degreesF < 100) {ledReset(); }

     

     

      Serial.print("voltage: ");

      Serial.print(voltage);

      Serial.print("  deg C: ");

      Serial.print(degreesC);

      Serial.print("  deg F: ");

      Serial.println(degreesF);

     

     

    delay(100);

     

     

     

     

     

     

    }

     

     

    void ledReset() { digitalWrite(ledAlrm1Pin,LOW); digitalWrite(ledAlrm2Pin,LOW); }

     

    //Alarm priocess

     

     

    void alarm1()  {

    alarmSpeed = 500/2;

    // alarmSpeed = alarmSpeed + 100;

     

     

     

      tone(soundPin,100,1000);

     

      digitalWrite(ledAlrm2Pin,LOW);

      digitalWrite(ledAlrm1Pin,HIGH);

     

        delay(alarmSpeed);

     

      digitalWrite(ledAlrm1Pin,LOW);

      digitalWrite(ledAlrm2Pin,HIGH);

     

      noTone(soundPin);

     

      tone(soundPin,200,1000);

     

        delay(alarmSpeed);

     

      digitalWrite(ledAlrm1Pin,HIGH);

      digitalWrite(ledAlrm2Pin,LOW);

     

      noTone(soundPin);

     

     

     

    }

     

     

    void noPerph() {

     

        digitalWrite(ledTempPin[0],LOW);

        digitalWrite(ledTempPin[1],LOW);

        digitalWrite(ledTempPin[2],LOW);

        digitalWrite(ledTempPin[3],LOW);

        digitalWrite(ledTempPin[4],LOW);

      

         digitalWrite(ledTempPin[0],LOW);

        digitalWrite(ledTempPin[1],HIGH);

      

        delay(300);

      

        delay(300);

      

        digitalWrite(ledTempPin[1],LOW);

        digitalWrite(ledTempPin[2],HIGH);

        delay(300);

      

        delay(300);

        digitalWrite(ledTempPin[2],LOW);

        digitalWrite(ledTempPin[3],HIGH);

        delay(300);

      

        delay(300);

        digitalWrite(ledTempPin[3],LOW);

        digitalWrite(ledTempPin[4],HIGH);

        delay(300);

      

        delay(300);

        digitalWrite(ledTempPin[4],LOW);

        digitalWrite(ledTempPin[0],HIGH);

        delay(300);

      

        delay(300);

     

     

     

     

    }

     

     

    float getVoltage(int pin)

    {

      // This function has one input parameter, the analog pin number

      // to read. You might notice that this function does not have

      // "void" in front of it; this is because it returns a floating-

      // point value, which is the true voltage on that pin (0 to 5V).

     

      // You can write your own functions that take in parameters

      // and return values. Here's how:

     

        // To take in parameters, put their type and name in the

        // parenthesis after the function name (see above). You can

        // have multiple parameters, separated with commas.

      

        // To return a value, put the type BEFORE the function name

        // (see "float", above), and use a return() statement in your code

        // to actually return the value (see below).

     

        // If you don't need to get any parameters, you can just put

        // "()" after the function name.

     

        // If you don't need to return a value, just write "void" before

        // the function name.

     

     

      // Here's the return statement for this function. We're doing

      // all the math we need to do within this statement:

     

      return (analogRead(pin) * 0.004882814);

     

      // This equation converts the 0 to 1023 value that analogRead()

      // returns, into a 0.0 to 5.0 value that is the true voltage

      // being read at that pin.

    }

Reply
  • 0 in reply to Robert Peter Oakes

    ,here is my setup, and i want to power the chip with just 3- 4 AAA batterys

    imageimageimage

     

    Here is my code :

     

    int soundPin  = 2;

    int ledPwerPin  = 6;

    int ledAlrm1Pin  = 12;

    int ledAlrm2Pin  = 13;

    int ledTempPin [] = {7,8,9,10,11};

    const int tempPin  = 0;

     

     

    void setup() {

      // put your setup code here, to run once:

      pinMode(soundPin, OUTPUT);

      pinMode(ledAlrm1Pin, OUTPUT);

     

      pinMode(ledAlrm2Pin, OUTPUT);

       pinMode(ledPwerPin, OUTPUT);

      pinMode(ledTempPin[0], OUTPUT);

      pinMode(ledTempPin[1], OUTPUT);

      pinMode(ledTempPin[2], OUTPUT);

      pinMode(ledTempPin[3], OUTPUT);

      pinMode(ledTempPin[4], OUTPUT);

     

      Serial.begin(9600);

    }

     

     

    int alarmSpeed = 9;

    int waitPerphMode = false;

     

     

    //////main process

     

     

    void loop() {

     

     

    float voltage, degreesC, degreesF;

     

     

    digitalWrite(ledPwerPin, HIGH  ) ;

     

     

    voltage = getVoltage(tempPin);

    degreesC = (voltage - 0.604) * 100.0;

    degreesF = degreesC * (9.0/5.0) + 32.0;

     

     

     

     

    if (degreesF > 100 && degreesF <= 105 ) { alarm1(); }

        else if (degreesF > 102) { noPerph(); }

     

     

    if (degreesF > 16.6) { digitalWrite(ledTempPin[0],HIGH ); }

        if (degreesF < 16.6) { digitalWrite(ledTempPin[0],LOW ); }

    if (degreesF > 33.2) { digitalWrite(ledTempPin[1],HIGH ); }

        if (degreesF < 33.2) { digitalWrite(ledTempPin[1],LOW ); }

    if (degreesF > 49.8) { digitalWrite(ledTempPin[2],HIGH ); }

        if (degreesF < 49.8) { digitalWrite(ledTempPin[2],LOW ); }

    if (degreesF > 66.4) { digitalWrite(ledTempPin[3],HIGH ); }

        if (degreesF < 66.4) { digitalWrite(ledTempPin[3],LOW ); }

    if (degreesF > 83) { digitalWrite(ledTempPin[4],HIGH ); }

      if (degreesF < 83) { digitalWrite(ledTempPin[4],LOW ); }

     

     

     

      

    if (degreesF < 100) {ledReset(); }

     

     

      Serial.print("voltage: ");

      Serial.print(voltage);

      Serial.print("  deg C: ");

      Serial.print(degreesC);

      Serial.print("  deg F: ");

      Serial.println(degreesF);

     

     

    delay(100);

     

     

     

     

     

     

    }

     

     

    void ledReset() { digitalWrite(ledAlrm1Pin,LOW); digitalWrite(ledAlrm2Pin,LOW); }

     

    //Alarm priocess

     

     

    void alarm1()  {

    alarmSpeed = 500/2;

    // alarmSpeed = alarmSpeed + 100;

     

     

     

      tone(soundPin,100,1000);

     

      digitalWrite(ledAlrm2Pin,LOW);

      digitalWrite(ledAlrm1Pin,HIGH);

     

        delay(alarmSpeed);

     

      digitalWrite(ledAlrm1Pin,LOW);

      digitalWrite(ledAlrm2Pin,HIGH);

     

      noTone(soundPin);

     

      tone(soundPin,200,1000);

     

        delay(alarmSpeed);

     

      digitalWrite(ledAlrm1Pin,HIGH);

      digitalWrite(ledAlrm2Pin,LOW);

     

      noTone(soundPin);

     

     

     

    }

     

     

    void noPerph() {

     

        digitalWrite(ledTempPin[0],LOW);

        digitalWrite(ledTempPin[1],LOW);

        digitalWrite(ledTempPin[2],LOW);

        digitalWrite(ledTempPin[3],LOW);

        digitalWrite(ledTempPin[4],LOW);

      

         digitalWrite(ledTempPin[0],LOW);

        digitalWrite(ledTempPin[1],HIGH);

      

        delay(300);

      

        delay(300);

      

        digitalWrite(ledTempPin[1],LOW);

        digitalWrite(ledTempPin[2],HIGH);

        delay(300);

      

        delay(300);

        digitalWrite(ledTempPin[2],LOW);

        digitalWrite(ledTempPin[3],HIGH);

        delay(300);

      

        delay(300);

        digitalWrite(ledTempPin[3],LOW);

        digitalWrite(ledTempPin[4],HIGH);

        delay(300);

      

        delay(300);

        digitalWrite(ledTempPin[4],LOW);

        digitalWrite(ledTempPin[0],HIGH);

        delay(300);

      

        delay(300);

     

     

     

     

    }

     

     

    float getVoltage(int pin)

    {

      // This function has one input parameter, the analog pin number

      // to read. You might notice that this function does not have

      // "void" in front of it; this is because it returns a floating-

      // point value, which is the true voltage on that pin (0 to 5V).

     

      // You can write your own functions that take in parameters

      // and return values. Here's how:

     

        // To take in parameters, put their type and name in the

        // parenthesis after the function name (see above). You can

        // have multiple parameters, separated with commas.

      

        // To return a value, put the type BEFORE the function name

        // (see "float", above), and use a return() statement in your code

        // to actually return the value (see below).

     

        // If you don't need to get any parameters, you can just put

        // "()" after the function name.

     

        // If you don't need to return a value, just write "void" before

        // the function name.

     

     

      // Here's the return statement for this function. We're doing

      // all the math we need to do within this statement:

     

      return (analogRead(pin) * 0.004882814);

     

      // This equation converts the 0 to 1023 value that analogRead()

      // returns, into a 0.0 to 5.0 value that is the true voltage

      // being read at that pin.

    }

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