diff --git a/seg7/README.md b/seg7/README.md
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+# Active High 7 Segment Decoder
+
+### 7 Segment Decoder
+
+Every digit from 0 to 9 can be displayed using the 7 segments labelled a through g as follows:
+
+![7 segment display](Untitled.png)
+
+### Input
+
+4 bit number ranging from 0 to 9
+
+### Output
+
+7 bit number with MSB corresponding to A and LSB to G. The output is in accordance with the definiton of the active high condition, with
+
+1 = ON
+
+0 = OFF
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diff --git a/seg7/Untitled.png b/seg7/Untitled.png
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diff --git a/seg7/seg7.v b/seg7/seg7.v
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+module seg7(
+    bcd,
+    seg
+);
+
+input [3:0] bcd;
+output reg [6:0] seg;
+//reg [6:0] seg;
+
+always @(bcd) begin
+    case (bcd)
+    0 : seg = 7'b1111110;
+    1 : seg = 7'b0110000;
+    2 : seg = 7'b1101101;
+    3 : seg = 7'b1111001;
+    4 : seg = 7'b0110011;
+    5 : seg = 7'b1011011;
+    6 : seg = 7'b1011111;
+    7 : seg = 7'b1110000;
+    8 : seg = 7'b1111111;
+    9 : seg = 7'b1111011;
+    //switch off 7 segment character when the bcd digit is not a decimal number.
+    default : seg = 7'b0000000; 
+
+    endcase
+end
+
+endmodule
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diff --git a/seg7/seg7_tb.v b/seg7/seg7_tb.v
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+`include "seg7.v"
+
+module seg7_tb();
+
+reg [3:0] bcd;
+wire [6:0] seg;
+
+seg7 uut(
+    .bcd(bcd),
+    .seg(seg)
+);
+
+initial begin
+    $dumpfile("seg7_tb.vcd");
+    $dumpvars(0, seg7_tb);
+
+    bcd = 4'b0;
+
+    #200 $finish;
+end
+
+always #20 bcd = bcd + 1;
+
+always @(bcd) begin
+    #5;
+    $display("%b",seg);
+    $write(" ");
+
+    if (seg[6]) begin   //a
+        $write("_");
+    end
+    else begin
+        $write(" ");
+    end
+
+    $write("\n");
+
+    if (seg[1]) begin   //f
+        $write("|");
+    end
+    else begin
+        $write(" ");
+    end
+
+    if (seg[0]) begin   //g
+        $write("_");
+    end
+    else begin
+        $write(" ");
+    end
+
+    if (seg[5]) begin   //b
+        $write("|");
+    end
+    else begin
+        $write(" ");
+    end
+
+    $write("\n");
+
+    if (seg[2]) begin   //e
+        $write("|");
+    end
+    else begin
+        $write(" ");
+    end
+
+    if (seg[3]) begin   //d
+        $write("_");
+    end
+    else begin
+        $write(" ");
+    end
+
+    if (seg[4]) begin   //c
+        $write("|");
+    end
+    else begin
+        $write(" ");
+    end
+
+    $write("\n\n");
+end
+
+endmodule
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