Make a Oscilloscope by using a Laptop_With Arduino_ Under 3 $ dollar.

The first step

Those who love electronics

Oscilloscope is very useful to them

Today I will tell you how to make Oscilloscope.

therefore i had made a circuit out of arduino board, 

i connect two alligator clip with the arduino board,

 i use the because for making my work easy to measure any wave frequency .

So i connect my USB cable with my laptop

and the other end to the ardino.

so you can see the circuit is running.

now i open the PC Scope software in my laptop.

for now it looks like this.

second step

Arduino code

const int analogInPin1 = A0;  // Analog input pin that the potentiometer is attached to

static int ctr,flag_tog;

static unsigned char adcval;

void setup()

{

  Serial.begin(115200);

  

  pinMode(13, OUTPUT);

  ADCSRA = 0;             // clear ADCSRA register

  ADCSRB = 0;             // clear ADCSRB register

  ADMUX |= (0 & 0x07);    // set A0 analog input pin

  ADMUX |= (1 << REFS0);  // set reference voltage

  ADMUX |= (1 << ADLAR);  // left align ADC value to 8 bits from ADCH register

  // sampling rate is [ADC clock] / [prescaler] / [conversion clock cycles]

  // for Arduino Uno ADC clock is 16 MHz and a conversion takes 13 clock cycles

  //ADCSRA |= (1 << ADPS2) | (1 << ADPS0);    // 32 prescaler for 38.5 KHz

  ADCSRA |= (1 << ADPS2);                     // 16 prescaler for 76.9 KHz

  //ADCSRA |= (1 << ADPS1) | (1 << ADPS0);    // 8 prescaler for 153.8 KHz

  ADCSRA |= (1 << ADATE); // enable auto trigger

  ADCSRA |= (1 << ADIE);  // enable interrupts when measurement complete

  ADCSRA |= (1 << ADEN);  // enable ADC

  ADCSRA |= (1 << ADSC);  // start ADC measurements

}

ISR(ADC_vect)

{

  adcval = ADCH;  // read 8 bit value from ADC

}

  

void loop()

{

  Serial.write(adcval);

   ctr=0; 

   flag_tog = !flag_tog; 

   digitalWrite(13, flag_tog);

  }

}

Third Step

I had put the coding in the arduino, 

so now we just need to connect the aurdino to the software.

now i click on the connect button, it will take a while and now you can see the wave line.

now i will check the 555ic's  PWM frequency, it should be in between 50 to 60 hertz 

I connect the ground alligator clip to the ground pin, and frequency alligator clip to the IC’s 3rd pin which is IC’s output pin.

So now You Can See The Square Wev line.

and also the frequency, between 50 to 60 hertz which i told you before.

you can also change the scale by clicking on the nobs .

okh and now i want to check the alternative current, 

now I take a 6.0.6 transformer 

and now i will check the voltage

so you can see here is 6 volts showing on one side, and together 12 volts.

and i connect the Arduino Oscilloscope  clip on one side of the transformer. 

you can see the wave and also the volt.

it is showing 6 volts as on the meter .

and frequency under 50 hertz 

and i connect clip on both on the sides of the transformer and it is showing 12 volts and same hertz.

it is really very simple to make the aurdino Oscilloscope .

you can see this diagram i made the circuit same as this diagram.

you have to follow that from 0 analog  pin of aurdino .

you have connect 570 resistor  for the safety of the aurdino.

and another 10k resistor to ground to analog zero for noise clearation.

i connect a pre set on the other side of the 570k resistor to adjust the frequency as i want.

so now i open the software and put the code, 

it is not as perfect as the Oscilloscope , which you can get in the stores.

you can use it as a basic Oscilloscope which is made by yourself.