diff --git a/FinalTerm/.eide/eide.json b/FinalTerm/.eide/eide.json
index 781ec5a..6fce81f 100644
--- a/FinalTerm/.eide/eide.json
+++ b/FinalTerm/.eide/eide.json
@@ -18,7 +18,9 @@
   },
   "targets": {
     "Debug": {
-      "excludeList": [],
+      "excludeList": [
+        "src/main.c"
+      ],
       "toolchain": "Keil_C51",
       "compileConfig": {
         "options": "null"
diff --git a/FinalTerm/schematic.pdsprj b/FinalTerm/schematic.pdsprj
new file mode 100644
index 0000000..e5561b6
Binary files /dev/null and b/FinalTerm/schematic.pdsprj differ
diff --git a/FinalTerm/src/51pins/51pins.h b/FinalTerm/src/51pins/51pins.h
new file mode 100644
index 0000000..1b34546
--- /dev/null
+++ b/FinalTerm/src/51pins/51pins.h
@@ -0,0 +1,70 @@
+/*
+ * @name: 51pins.h
+ * @author: msksbr
+ * @date: 2025-05-29
+ * @description: defines the 7 segs chars and pins for LEDs, 74HC138 and buttons
+ * @usage: #include "REG52.H"
+ */
+#include <REG52.H>
+
+// 74HC138 pins (P1)
+// controller pins
+sbit ADDR0 = P1 ^ 0; // to A(A0)
+sbit ADDR1 = P1 ^ 1; // to B(A1)
+sbit ADDR2 = P1 ^ 2; // to C(A2)
+// enable pins
+sbit ADDR3 = P1 ^ 3; // to E1
+sbit ENLED = P1 ^ 4; // to E2 & E3
+
+// 7seg chars(P2)
+unsigned char code seg7chars[] = {
+    0xFC, // 0: a b c d e f
+    0x60, // 1: b c
+    0xDA, // 2: a b g e d
+    0xF2, // 3: a b g c d
+    0x66, // 4: f g b c
+    0xB6, // 5: a f g c d
+    0xBE, // 6: a f g c d e
+    0xE0, // 7: a b c
+    0xFE, // 8: all segments
+    0xF6, // 9: a b c d f g
+    0xEE, // A: a b c e f g
+    0x3E, // B: c d e f g
+    0x9C, // C: a d e f
+    0x7A, // D: b c d e g
+    0x9E, // E: a d e f g
+    0x8E, // F: a e f g
+    0x02, // dp: decimal point
+    0x00, // all on
+    0xFF  // blank: all off
+};
+
+// switch 74HC138
+void switch138(unsigned char channel)
+{
+    // @subsection: turn DEC channel to 3 BIN bits
+    bit A0 = channel & 0x01;
+    bit A1 = (channel >> 1) & 0x01;
+    bit A2 = (channel >> 2) & 0x01;
+    // @subsection: enable 74HC138
+    ADDR3 = 1;
+    ENLED = 0;
+    // @subsection: set 74HC138 pins
+    ADDR0 = A0;
+    ADDR1 = A1;
+    ADDR2 = A2;
+}
+
+// timer by ms based on timer0
+void delay_ms(unsigned int ms)
+{
+    TMOD = 0x01;
+    for (; ms > 0; ms--) {
+        TH0 = 0xFC;
+        TL0 = 0x66;
+        TR0 = 1;
+        while (!TF0);
+        TR0 = 0;
+        TF0 = 0;
+    }
+}
\ No newline at end of file
diff --git a/FinalTerm/src/test/testPNP.c b/FinalTerm/src/test/testPNP.c
new file mode 100644
index 0000000..69627f7
--- /dev/null
+++ b/FinalTerm/src/test/testPNP.c
@@ -0,0 +1,25 @@
+/*
+ * @name: testPNP.c
+ * @author: msksbr
+ * @date: 2025-05-29
+ * @description: test PNP power supply.
+ */
+
+#include <REG52.H>
+#include "../51pins/51pins.h"
+
+unsigned char currentChannel = 0;
+
+void main()
+{
+    while (1) {
+        P2 = 0x00;
+        switch138(currentChannel);
+        if (currentChannel == 7) {
+            currentChannel = 0;
+        } else {
+            currentChannel++;
+        }
+        delay_ms(1);
+    }
+}
\ No newline at end of file