}

digitalWrite(13, LOW);

}

// Convert ADC value to key number

int get_key(unsigned int input)

{

int k;

for (k = 0; k < NUM_KEYS; k++)

{

if (input < adc_key_val[k])

{

return k;

}

}

if (k >= NUM_KEYS)

k = -1;

// No valid key pressed

return k;

}

 

Dual DC Motor Speed Control

Hardware Setting

Connect four motor wires to Motor Terminal. And apply power through motor power terminal (Figure

4).

Fig3: Romeo Motor Connection Diagram