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+#include <util/atomic.h>
+#include <stdint.h>
+#include <Streaming.h>
+// Constants
+enum {
+    };
+const int PULSE_INPUT_PIN = 2;
+const int PULSE_OUTPUT_PIN = 3;
+const int INTERRUPT_NUMBER = 0;
+const int COUNTER_OUTPUT_PINS[NUM_COUNTER_BITS] = {5,6,7,8,9,10,11,12};
+const unsigned long MAX_PERIOD = 500000; 
+const unsigned long PULSE_HIGH_FRAC = 10;
+// Global variables
+bool pulseHigh = false;
+bool skipPulse = false;
+unsigned long pulseCount = 0;
+unsigned long pulseTime = 0;
+unsigned long pulseTimeLast = 0;
+unsigned int displayMode = DISPLAY_NUMBER;
+// Function prototypes
+void onPulseInterrupt();
+void resetOutpuPulse();
+void setOuputCounterBits(unsigned short count);
+void setup() {
+    Serial.begin(9600);
+    for (int i=0; i<NUM_COUNTER_BITS; i++) {
+        pinMode(COUNTER_OUTPUT_PINS[i],OUTPUT);
+    }
+    digitalWrite(PULSE_INPUT_PIN, LOW);
+    digitalWrite(PULSE_OUTPUT_PIN, LOW);
+    attachInterrupt(INTERRUPT_NUMBER,onPulseInterrupt,RISING);
+void loop() {
+    int cmd;
+    unsigned long pulseCountCopy;
+    resetOutputPulse();
+    while(Serial.available() > 0) {
+        cmd =;
+        switch (cmd) {
+            case 's':
+                // Skip a pulse
+                    skipPulse = true;
+                }
+                break;
+            case 'r':
+                // Reset pulse count 
+                    pulseCount = 0;
+                }
+                break;
+            case 'c':
+                // Return pulse count
+                    pulseCountCopy = pulseCount;
+                }
+                Serial << pulseCountCopy << ", ";
+                Serial << pulseCountCopy%(1<<NUM_COUNTER_BITS) << endl;
+                break;
+            case 'b':
+                displayMode = DISPLAY_BINARY;
+                break;
+            case 'n':
+                displayMode = DISPLAY_NUMBER;
+                break;
+            default:
+                break;
+        }
+    }
+void resetOutputPulse() {
+    unsigned long dt;
+    unsigned long period;
+    unsigned long currentTime; 
+    unsigned short pulseCount8Bit;
+    if (pulseHigh) {
+        period = pulseTime - pulseTimeLast;
+        if (period > MAX_PERIOD) {
+            period = MAX_PERIOD;
+        }
+            currentTime = micros();
+            // Note, need to change to handle wrap around
+            dt = currentTime - pulseTime;
+            if (dt > period/PULSE_HIGH_FRAC) {
+                digitalWrite(PULSE_OUTPUT_PIN, LOW);
+                pulseHigh = false;
+                pulseCount8Bit = pulseCount%(1<<NUM_COUNTER_BITS);
+                setCounterOutputBits(pulseCount8Bit);
+            }
+        }
+    }
+void setCounterOutputBits(unsigned short count) {
+    if (displayMode == DISPLAY_BINARY) {
+        for (int i=0; i<NUM_COUNTER_BITS; i++) {
+            digitalWrite(COUNTER_OUTPUT_PINS[i], 0x01 &(count>>i));
+        }
+    }
+    else {
+        for (int i=0; i<NUM_COUNTER_BITS; i++) {
+            if ( i <= (count%NUM_COUNTER_BITS) ) {
+                digitalWrite(COUNTER_OUTPUT_PINS[i], HIGH);
+            }
+            else {
+                digitalWrite(COUNTER_OUTPUT_PINS[i], LOW);
+            }
+        }
+    }
+void onPulseInterrupt() {
+    if (skipPulse) {
+        skipPulse = false;
+    }
+    else {
+        digitalWrite(PULSE_OUTPUT_PIN, HIGH);
+        pulseHigh = true;
+        pulseTimeLast = pulseTime;
+        pulseTime = micros();
+    }
+    pulseCount += 1;
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