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My countdown timer as seen on TV: http://www.youtube.com/watch?v=Qv_ruj4lhXo
#include <Servo.h>
#define SERVO 11
byte leds[] = { 4, 5, 6, 7, 8, 9 };
#define NLEDS 6
// Manually placing the pointer since the actual labels
// ended up being slightly off.
// 5 4 3 2 1
byte positions[] = { 148, 119, 79, 52, 27, 0 };
Servo servo;
void setup() {
Serial.begin(9600);
// Initialize the countdown LEDS
for(int i = 0; i < NLEDS; i++) {
pinMode(leds[i], OUTPUT);
digitalWrite(leds[i], LOW);
}
// Point the servo at 0
servo.attach(SERVO);
setAndWait();
}
void setAndWait() {
servo.write(180);
Serial.println("hello");
// Turn off all the lights.
for(int i = 0; i < NLEDS; i++) {
digitalWrite(leds[i], LOW);
}
// Wait for my signal
bool readyToGo = false;
while(!readyToGo) {
byte b = Serial.read();
switch(b) {
case 'g': // GO!
readyToGo = true;
break;
case 's': // Synchronize
Serial.println("s");
// blink a sync pattern
for(int i = 0; i < NLEDS; i++) {
digitalWrite(leds[i], HIGH);
delay(10);
digitalWrite(leds[i], LOW);
}
break;
default:
delay(50);
}
}
for(int i = 0; i<NLEDS; i++) {
digitalWrite(leds[i], HIGH);
servo.write(positions[i]);
delay(1000);
digitalWrite(leds[i], LOW);
}
}
void blinkErratically() {
// Select a random light to blink.
int led = leds[random(0, NLEDS)];
digitalWrite(led, HIGH);
delay(random(20, 100));
digitalWrite(led, LOW);
delay(random(20, 100));
}
void loop() {
// If the control channel sends an 'r' command, reset state.
// This allows testing and stuff.
if (Serial.available() && Serial.read() == 'r') {
setAndWait();
}
blinkErratically();
}
#!/usr/bin/env python
# worse is better
import os
import sys
import time
import serial
def timeTilNearest(secondFactor):
t = int(time.time())
nearest = 10
nextT = (int(t / secondFactor) * secondFactor) + secondFactor
duration = nextT - t
return duration
def sync(ser):
print "Sending sync cmd..."
ser.write("s")
ser.flush()
print "Waiting for sync response."
b = ser.readline().strip()
print "Read", repr(b)
assert(b == 's')
if __name__ == '__main__':
ser = serial.Serial("/dev/tty.usbserial-A900acmg")
print ser.readline().strip()
sync(ser)
t = time.time()
duration = timeTilNearest(3600)
# duration = timeTilNearest(30)
nextT = t + duration
while t < nextT - 10:
# Compute the time on each iteration.
then = nextT - t - 10
duration = min(15, then)
print "It's now %s, flashing in %ds at %s" % (time.ctime(t),
then, time.ctime(nextT))
if nextT - t < 600:
sync(ser)
time.sleep(max(0, duration))
t = time.time()
t = time.time()
print "Counting down at %s (%f to go)" % (time.ctime(t), nextT - t)
for w in (10, 9, 8, 7):
# Do a vocal countdown. I recalculate the time duration on
# each request so I don't have to worry about how long it
# takes to issue the say command.
duration = nextT - w - time.time()
print "Sleeping at %d for %f" % (w, duration)
time.sleep(max(0, duration))
os.system("say %d" % w)
print "Adjusting volume and stuff at %s." % (time.ctime(time.time()))
os.system("""osascript -e 'tell application "iTunes" to pause'""")
os.system("""osascript -e 'tell application "iTunes" to set sound volume to 100' &""")
os.system("say 6")
time.sleep(max(0, nextT - time.time() - 5))
print "Executing at %s" % time.ctime(time.time())
ser.write("g\n")
ser.flush()
time.sleep(1)
print "Playing music"
os.system("""osascript -e 'tell application "iTunes" to play track named "Auld Lang Syne"'""")
# How long to do the light show.
time.sleep(108)
print "Sending an r"
ser.write("r\n")
ser.flush()
time.sleep(1)
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