What should I add to this code to increase the volume for the sound in the speaker..??

[tanmayi06]

include "talkie.h"

Talkie voice; const int8_t speech[] PROGMEM={0x00,0x00,0x00,0x08,0xd8,0x39,0x54,0x00,0xa7,0xa6,0x32,0xe0,0x04,0x46,0x55,0x28,0xde,0x53,0xaa,0xa9,0x42,0xe9,0x69,0x95,0xbb,0x4f,0x4c,0xa5,0xe7,0x51,0x15,0x5e,0x31,0x94,0x91,0x49,0xee,0xa8,0xc5,0x50,0x45,0x2a,0xb9,0x13,0x02,0x43,0xad,0xb9,0xf7,0x9d,0x0b,0x76,0x35,0x17,0x31,0xb7,0x46,0xd8,0x35,0x96,0x69,0xdf,0xb8,0x60,0xd3,0x54,0xc0,0x31,0x97,0xa2,0x14,0xf0,0x27,0xa3,0x02,0xfe,0xbb,0x52,0xc0,0x3f,0x3b,0x0a,0x38,0x79,0x42,0x00,0xbb,0xb4,0x2b,0x60,0x06,0x43,0xd7,0x65,0x4e,0xde,0xe9,0xa5,0x52,0x1f,0x94,0x56,0x58,0x84,0x2c,0x7d,0x34,0x9e,0xe6,0x15,0xb0,0x0d,0xd1,0x87,0x8b,0x77,0xc8,0xd4,0x87,0x58,0x4e,0x5e,0x11,0x52,0x1f,0x7c,0x17,0x78,0x95,0x0c,0xbd,0x77,0xdd,0x60,0x55,0xc1,0x75,0xce,0x6c,0x13,0xd7,0x04,0xd7,0x05,0x91,0xc3,0xec,0x33,0x44,0x67,0x79,0x0c,0x53,0x34,0x02,0x04,0xec,0xe4,0xcc,0x80,0x9d,0x53,0x10,0x30,0x05,0x13,0x69,0x3a,0x26,0xce,0xb4,0xd4,0xaa,0xc9,0x48,0xa3,0xc2,0x1a,0xa4,0x2e,0xb0,0xa8,0x76,0xab,0xe0,0x3a,0xab,0xb2,0xda,0x24,0x02,0x1a,0x89,0x9e,0x74,0x33,0x07,0x80,0x80,0x95,0xcd,0x19,0x30,0x9d,0x85,0x00,0xba,0xf6,0x14,0x25,0x0f,0x9d,0x6a,0x5e,0xc1,0x95,0x22,0x75,0x48,0x46,0x88,0x54,0xba,0x10,0xa1,0xd9,0x25,0x53,0xe9,0x62,0xb8,0x77,0x95,0x0c,0xa5,0x4e,0x69,0x39,0x16,0x31,0x94,0xaa,0xba,0xe5,0x48,0x2c,0x57,0xda,0x26,0xda,0x23,0x0d,0x5d,0xe5,0x1b,0x7b,0x8f,0x34,0x72,0x75,0x28,0x14,0xd5,0xd2,0xd0,0x34,0xa9,0xa1,0xe5,0x48,0x43,0xd5,0xa6,0x8a,0x96,0x23,0x09,0x55,0x97,0x2a,0xa9,0xad,0xc4,0x52,0x5d,0x0e,0xaa,0xbc,0xd2,0x58,0xf4,0xd5,0xa9,0x41,0x46,0x1c,0xf2,0x0f,0xc3,0x2a,0xc2,0x8d,0xc9,0x3f,0x93,0x99,0x12,0x26,0x46,0xc0,0xca,0xa2,0x00,0x00,0x00,0x0f}; const int ProxSensor=2; int inputVal=0;

void setup() { pinMode(13,OUTPUT); pinMode(7,OUTPUT); pinMode(8,OUTPUT); pinMode(ProxSensor,INPUT); Serial.begin(9600); // put your setup code here, to run once: }

void loop() { if(digitalRead(ProxSensor)==HIGH) { digitalWrite(13,HIGH); } else { digitalWrite(13,LOW); } inputVal=digitalRead(ProxSensor); Serial.println(inputVal); if(inputVal==0) { digitalWrite(7,HIGH); //digitalWrite(8,HIGH); // voice.say(speech); //delay(3500); //exit(); } else { digitalWrite(7,LOW); //digitalWrite(8,LOW); } if(inputVal==0) { voice.say(speech); delay(2500); //exit(); }

// put your main code here, to run repeatedly:

}

[deladriere]

Hi, nice sound ! where does it comes from?

[jremington]

To increase the speaker volume, you need an amplifier. Tell us about your output circuit.

[deladriere]

@jremington or check this out too : https://github.com/going-digital/Talkie/pull/8/commits/cba63c074818afb0ac1c16a6aba25e73b5a95744

[jremington]

I tried the programmatic approach mentioned above, and found that the output volume of the code can't be increased very much without distorting the output. A suitable audio amplifier on the output is definitely the way to go.

You may need a low pass filter on the output to prevent the high frequency PWM from getting into the amplifier.

[deladriere]

@jremington Yep agreed! I had also experienced distortion with this piece of code, so of course an amp circuit is the solution

[tanmayi06]

      To increase the speaker volume, you need an amplifier. Tell us about your output circuit.

In the output I just connected a digital ir sensor to the Arduino,2 LED,s to the Arduino and 2 pins to the speaker..(one is to the gnd nd the other to digital pin 3..??)

Thank q for ur reply..:)

[jremington]

You will damage the Arduino, connecting a pin to a speaker. Use an amplifier of some sort.

[ArminJo]

Use the Arduino Talkie library and connect the Speaker (> 32Ohm) betwen the non inverted / 3 and Inverted / 11output.