After that I painted it red using red spray paint. (Don't forget the respirator!)
Then i got an unbreakable nylon blank plate and cut it down to fit the opening on the box adapter using a bandsaw. Then I spray painted it red too.
After that I went to Advance Auto Parts and bought a car headlight strobe kit. I tested the strobes and one didnt work. So i cut that one off and sealed the wires. The headlight kit was by APC.
When all the paint was dry, I drilled a hole into the middle of the blank plate and attached the strobe to it. Then i took the coverplate screws and screwed the blank plate to the red adapter plate.
I turned the box so the blank plate (now red and has a strobe) was horizontal and used a silver Sharpie marker to write FIRE on the adapter plate above and below where the blank plate attached.
Then I took an old speaker and hot glued it to the back of the adapter plate and wired a speaker wire to it. On the other end of the speaker wire, I connected a headphone plug that I bought at Radio Shack. I connected the speaker to an amplifier that I then connected to my computer. (Windows Vista!). I wired the strobe to my Radio Shack 12 volt power supply and tested it. The strobe flashed perfectly.
The strobe that I got came with a bunch of different colored "gels". I am using the white one.
Then I downloaded the Simplex whoop sound and the Simplex "alarm clock" sound heard in the beginning (from Simplex Austrailia) I then went to Silent Knight Fire Alarms and downloaded a voice from the voice evacuation page.
I put all the sounds together in a program called GoldWave in this sequence:
I then saved the file and played the sound through the alarm speaker. It came out loud but scratchy, so I adjusted the volume settings on the computer and amplifier until it came out loud (LOUD) and clear.