diff --git a/2ano/2semestre/ac2/aula10/part1-ex1.c b/2ano/2semestre/ac2/aula10/part1-ex1.c
index bbc8ed3..e9bae36 100644
--- a/2ano/2semestre/ac2/aula10/part1-ex1.c
+++ b/2ano/2semestre/ac2/aula10/part1-ex1.c
@@ -4,7 +4,7 @@ int main() {
     // Configure UART2:
     // 1 - Configure BaudRate Generator
     U2BRG = ((PBCLK + 8 * 115200) / (16 * 115200)) - 1;
-    U2MODEbits.BRGH = 0    // 16x baud clock enabled (1 -> 4x baud clock);
+    U2MODEbits.BRGH = 0;    // 16x baud clock enabled (1 -> 4x baud clock);
 
     // 2 - Configure number of data bits, parity and number of stop bits
     // (see U2MODE register)
diff --git a/2ano/2semestre/ac2/aula10/part1-ex4.c b/2ano/2semestre/ac2/aula10/part1-ex4.c
index 153904a..389d6b9 100644
--- a/2ano/2semestre/ac2/aula10/part1-ex4.c
+++ b/2ano/2semestre/ac2/aula10/part1-ex4.c
@@ -21,7 +21,7 @@ int main() {
     // Configure UART2:
     // 1 - Configure BaudRate Generator
     U2BRG = ((PBCLK + 8 * 115200) / (16 * 115200)) - 1;
-    U2MODEbits.BRGH = 1;    // 16x baud clock enabled (1 -> 4x baud clock)
+    U2MODEbits.BRGH = 0;    // 16x baud clock enabled (1 -> 4x baud clock)
 
     // 2 - Configure number of data bits, parity and number of stop bits
     // (see U2MODE register)
diff --git a/2ano/2semestre/ac2/aula10/part1-ex7.c b/2ano/2semestre/ac2/aula10/part1-ex7.c
index efaa3a8..b84b108 100644
--- a/2ano/2semestre/ac2/aula10/part1-ex7.c
+++ b/2ano/2semestre/ac2/aula10/part1-ex7.c
@@ -12,12 +12,9 @@ void putc(char byte) {
     U2TXREG = byte;
 }
 
-void sendCounter(int counter) {
-    while (counter != 0) {
-        char bit = counter & 0x1;
-        putc(bit);
-        counter >>= 1;
-    }
+void putstr(char *str) {
+    // use putc() function to send each charater ('\0' should not be sent)
+    while (*str != '\0') putc(*str++);
 }
 
 int main() {
@@ -38,14 +35,25 @@ int main() {
     // 4 - Enable UART2 (see register U2MODE)
     U2MODEbits.ON = 1;
 
-    int counter = 0;
+    int i, count = 0;
 
-    while (1) {
-        sendCounter(counter);
-        delay(5000);
-        counter = (counter + 1) % 10;
+    while(1) {
+        // Incrementa o contador módulo 10
+        count = (count + 1) % 10;
+
+        // Converte o valor do contador para binário
+        char binary[5];
+        for (i = 0; i < 4; i++) {
+            binary[3 - i] = (count & (1 << i)) ? '1' : '0';
+        }
+        binary[4] = '\0';
+
+        // Count modulo 10 em binário:
+        putstr(binary);
+        putc('\n');
+
+        delay(200);  // 5hz = 200ms
     }
-
     return 0;
 }