diff --git a/2ano/2semestre/ac2/extras_aula01-06/ex05.c b/2ano/2semestre/ac2/extras_aula01-06/ex05.c
new file mode 100644
index 0000000..f20be53
--- /dev/null
+++ b/2ano/2semestre/ac2/extras_aula01-06/ex05.c
@@ -0,0 +1,76 @@
+#include <detpic32.h>
+
+const unsigned int dis7Scodes[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D,
+                                   0xFD, 0x07, 0x7F, 0x6F, 0x77, 0xFC,
+                                   0x39, 0x5E, 0xF9, 0xF1};
+
+void delay(unsigned int ms) {
+    resetCoreTimer();
+    while (readCoreTimer() < ms * 20000);
+}
+
+typedef enum { HIGH, LOW } flag;
+
+void send2displays(unsigned char value) {
+    static flag f = LOW;
+
+    if (f == HIGH) {
+        LATD = (LATD & 0xFF9F) | 0x0040;
+        LATB = (LATB & 0x80FF) | dis7Scodes[value >> 4] << 8;
+        f = LOW;
+    } else {
+        LATD = (LATD & 0xFF9F) | 0x0020;
+        LATB = (LATB & 0x80FF) | dis7Scodes[value & 0x0F] << 8;
+        f = HIGH;
+    }
+}
+
+void clearDisplays() {
+    LATD = (LATD & 0xFF9F) | 0x0040;
+    LATB &= 0x80FF;
+    LATD = (LATD & 0xFF9F) | 0x0020;
+    LATB &= 0x80FF;
+}
+
+unsigned char toBdc(unsigned char value) {
+    return ((value / 10) << 4) + (value % 10);
+}
+
+int main() {
+    TRISB &= 0x80FF;
+    TRISD &= 0xFF9F;
+
+    int counter = 0;
+    char factor = 0;
+    int display_freq = 0;
+    int i = 0;
+
+    while (1) {
+        putChar('\r');
+        printInt(counter, 10 | 2 << 16);
+        char key = inkey();
+        if ('0' <= key && key <= '4') {
+            factor = key - '0';
+        }
+        if (key == '\n') {
+            display_freq = !display_freq;
+        }
+        if (display_freq) {
+            printStr(" -> ");
+            printInt(2 * (1 + factor), 10 | 2 << 16);
+            printStr(" Hz");
+            send2displays(toBdc(2 * (1 + factor)));
+        } else {
+            printStr("         \r");
+            clearDisplays();
+        }
+        if (i++ >= 50 / (2 * (1 + factor))) {
+            counter = (counter + 1) % 100;
+            i = 0;
+        }
+        delay(20);
+        
+    }
+
+    return 0;
+}
diff --git a/2ano/2semestre/ac2/extras_aula01-06/ex07.c b/2ano/2semestre/ac2/extras_aula01-06/ex07.c
new file mode 100644
index 0000000..d80492e
--- /dev/null
+++ b/2ano/2semestre/ac2/extras_aula01-06/ex07.c
@@ -0,0 +1,45 @@
+#include <detpic32.h>
+
+void delay(unsigned int ms) {
+    resetCoreTimer();
+    while (readCoreTimer() < ms * 20000);
+}
+
+int main() {
+    TRISBbits.TRISB4 = 1;
+    AD1PCFGbits.PCFG4 = 0;
+    AD1CON1bits.SSRC = 7;
+    AD1CON1bits.CLRASAM = 1;
+    AD1CON3bits.SAMC = 16;
+    AD1CON2bits.SMPI = 15;
+    AD1CHSbits.CH0SA = 4;
+    AD1CON1bits.ON = 1;
+
+    TRISB |= 0x000F;
+
+    int c = 0;
+    int factor = 1;
+    while (1) {
+        if (c++ >= 100 / factor) {
+            c = 0;
+            putChar('\r');
+            printStr("DS=");
+            char input = PORTB & 0x000F;
+            int i = 0;
+            for (; i < 4; i++) {
+                putChar((input >> (3 - i) & 0x0001) + '0');
+            }
+        }
+        AD1CON1bits.ASAM = 1;
+        while (IFS1bits.AD1IF == 0);
+        int value = ADC1BUF0;
+        int total = 0;
+        int *p = (int *)(&ADC1BUF0);
+        for (; p <= (int *)(&ADC1BUFF); p+=4)
+            total += *p;
+        factor = (total / 16) / 205 + 1;
+        delay(10);
+    }
+
+    return 0;
+}