X-Git-Url: https://code.citadel.org/?p=the_perfect_clock.git;a=blobdiff_plain;f=the_perfect_clock.ino;h=48050670dffc522ee099456ce8bb1f0316e419be;hp=318d641e1cbcaf392fa3527a34085d6862b81cbb;hb=HEAD;hpb=e764d8566466269f88e201f3b48686a076971389

diff --git a/the_perfect_clock.ino b/the_perfect_clock.ino
index 318d641..2529492 100644
--- a/the_perfect_clock.ino
+++ b/the_perfect_clock.ino
@@ -87,6 +87,11 @@ void setup() {
 // Note: only write to the display when the readout needs to be updated.
 // Speaking I2C on every loop iteration jams the WWVB receiver.
 void loop() {
+
+  // Reading it three times and taking the average gives us some hysteresis
+  int signal = (digitalRead(wwvb) + digitalRead(wwvb) + digitalRead(wwvb)) / 3;
+
+  // has the timer ticked?
 	unsigned long m = millis();
 	if (m != previous_millis) {
 		millisecond += (m - previous_millis);
@@ -101,14 +106,13 @@ void loop() {
 				}
 			}
 		}
-	}
+  }
 	previous_millis = m;
 
 	int pulse_length;
-	int signal = digitalRead(wwvb);				// is the input high or low right now?
 
   if (signal) {
-    analogWrite(timecodeled, 10);       // it's too bright on my board so we dim it; change to digitalWrite() if not needed
+    analogWrite(timecodeled, 5);       // it's too bright on my board so we dim it; change to digitalWrite() if not needed
   }
   else {
     digitalWrite(timecodeled, LOW);
@@ -120,13 +124,13 @@ void loop() {
 	else if ((!signal) && (previous_signal)) {		// trailing edge of pulse detected
 		pulse_length = millis() - start_of_pulse;
 
-		if (pulse_length > 175 && pulse_length < 225) {	// "0" bit ~= 200 ms (represented as "0")
+		if (pulse_length > 150 && pulse_length < 250) {	// "0" bit ~= 200 ms (represented as "0")
 			this_pulse = 0;
 		}
-		else if (pulse_length > 475 && pulse_length < 525) {	// "1" bit ~= 500 ms (represented as "1")
+		else if (pulse_length > 450 && pulse_length < 550) {	// "1" bit ~= 500 ms (represented as "1")
 			this_pulse = 1;
 		}
-		else if (pulse_length > 775 && pulse_length < 825) {	// marker bit ~= 800 ms (represented as "2")
+		else if (pulse_length > 750 && pulse_length < 850) {	// marker bit ~= 800 ms (represented as "2")
 			this_pulse = 2;
 		}
 		else {