Instructables
Picture of Snow Clock (Arduino Based)
Today I am going to show you how to make the snow clock. It is an alarm clock that only goes on when school is open. But if school is closed it doesn't go off.

This is all done by the Arduino and some python coding.
 
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Step 1: Get the Parts

For this project you will need:
-An Arduino
-Breadboard
-5V DC Relay
-1K Resistors
-1N004 Rectifier Diode
-2N2222 NPN Switching Transistor
-DPDT Switch
-CAT5e
-CAT5e Wall Jack
-Wire
-Alarm Clock

PLEASE READ THIS:
Please note that to turn on and off the alarm clock you need one that you would normally turn on and off with a switch. You should NOT use an alarm clock that requires you to press a switch to turn it on and press a button to turn it off.

Step 2: Hack the Alarm Clock

The first step to this is going to be the Alarm Clock.

First take apart your alarm clock and find were the switch is. Get to where the switch is and solder two wires to that. Now you can take out were the old button was and route the wire along the alarm clock. Then take some CAT5e, strip the end and then use the blue pair and connect them to the two wires that we soldered to the alarm clock. Now bend the other pairs on the CAT5e cable back a little so now you can use them to hold the wire in.

Now you have successfully hacked your alarm clock.
If you have ran into trouble here read the bottom of the first page on this instructable.

Step 3: The Relay Circuit

Picture of The Relay Circuit
alarm.jpg
Now we must make the relay circuit.
I have put the image of a sort of like schematic thing below. If you have any question just post them below.
Solder it all into your breadboard and then make wires for your Arduino.
IMPORTANT NOTICE: Do NOT solder directly to the Arduino. Solder to a wire and then when your done soldering connect that to the Arduino.
TOCO5 years ago
 I was looking at my pop science mag during study hall and noticed like many others that you are in it. Congratulations!!!
TheChemiker5 years ago
In Popular Science!  Good job!  That must have boosed your views and ratings greatly!  5 stars.  =D
Dude, you got into PopSci, that is a pretty sweet achievement!
Wasagi5 years ago
 This was featured in Popular Science! Excellent job!!!!!
burgarl115 years ago
do you know of any places to find where the closings would be listed?
insingertech (author)  burgarl115 years ago
try out your local radio stations website
cyrozap5 years ago
I've been trying to figure this out for a while, and this is great! Now all you need to do is get an Arduino ethernet shield so the Arduino can go online and check if school is closed without the need for a computer. Good work!
stienman5 years ago
This is hacking in its purest form! Excellent! -Adam
lemonie5 years ago
Top idea! L