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Anites/Big Ben - Revision history
2026-05-09T07:02:41Z
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Kenneth at 13:46, 17 May 2015
2015-05-17T13:46:13Z
<p></p>
<p><b>New page</b></p><div>Anites: Big Ben Clock - Raspberry Pi - http://www.anites.com/2014/11/big-ben-clock.html<br />
<br />
cronjob schedule:<br />
<pre><br />
# Big Ben<br />
# hourly from 7am to 10pm<br />
#0 7-22 * * * /opt/big_ben/big_ben.sh > /dev/null<br />
</pre><br />
<br />
Alternate schedule:<br />
<pre><br />
# Big Ben<br />
# hourly from 7am to 10pm<br />
#0 7-22 * * * /opt/big_ben/big_ben.sh > /dev/null<br />
# hourly from 7am to 10pm MON-FRI<br />
0 7-22 * * 1-5 /opt/big_ben/big_ben.sh > /dev/null<br />
</pre><br />
<br />
big_ben.sh:<br />
<pre><br />
#!/bin/bash<br />
<br />
# Author: Kenneth Burgener 2014<br />
# Purpose: Determine hour and play appropriate Big Ben MP3<br />
<br />
# crontab: (from 7am and 10pm)<br />
# 0 7-22 * * * /opt/big_ben/big_ben.sh > /dev/null<br />
<br />
# Audio files: https://www.dropbox.com/s/op69s9jh71w9npf/big_ben.zip<br />
<br />
# Get hour (1-12) for mp3 file<br />
HOUR=`date +%l`<br />
HOUR=$(( $HOUR ))<br />
<br />
# Get military hour (1-24) for math below<br />
MILHOUR=`date +%k`<br />
MILHOUR=$(( $MILHOUR ))<br />
<br />
# Set audio volume depending on time of day<br />
if [ $MILHOUR -le 8 -o $MILHOUR -ge 20 ] ; then<br />
# 8am and earlier, 8pm and later<br />
#/usr/bin/amixer set PCM 80% > /dev/null<br />
/usr/bin/amixer set PCM 90% > /dev/null<br />
else<br />
# 9am to 7pm<br />
#/usr/bin/amixer set PCM 95% > /dev/null<br />
/usr/bin/amixer set PCM 91% > /dev/null<br />
fi<br />
<br />
/usr/bin/mpg123 /opt/big_ben/audio/big_ben_$HOUR.mp3 2> /dev/null<br />
</pre><br />
<br />
Audio files: https://www.dropbox.com/s/op69s9jh71w9npf/big_ben.zip</div>
Kenneth