I really liked Captain Spatula's Deluxe TARDIS design but I wanted the lights to pulse and I wanted to add sound, I also only had 3mm LEDs on hand. I've remade some of the parts, specifically the following:
Note you'll need to download the parts from http://www.thingiverse.com/thing:124033 first, if you have the 5mm LEDs then the only custom part you need from mine is the battery holder.
LED Holder - Redesigned for 3mm LEDs
Lamp Shade - Redesigned for 3mm LEDs
Battery Holder - Redesigned to allow an Arduino Pro Mini Clone (the ebay ones) to fit as well as added a ledge for a speaker to rest on.
The power consumption is pretty low, the initial sequence is around 60mA then after it should be down around 40mA
The Arduino code is pretty simple, this was actually my first Arduino project so the code may not be completely optimized but it seems to work well. It uses the tone library to play the Doctor Who intro theme, then the lights turn on and for the first 3 cycles of the light dimming the speakers emit a tone that follows the light (a crude simulation of the takeoff sound) then the speaker mutes and the light keeps pulsing.
Video link https://youtu.be/8yTFDHHQFvE
WARNING: Code bug causes sound to reactivate after ~17 minutes, I believe this is because my counter variable is rolling over to -37,768, I need to fix the code.
Hopefully between the schematic and broadboard images as well as the comments in the code there is enough info for others to make this. If you're new to arduino I recommend first going through this tutorial on fading an LED
Then to get a handle on the sound part go through this one:
My code is really just a mashup of the two :)
3D printer to print the TARDIS parts
Arduino Pro Mini Clone 5V (any arduino should work though)
5 white LEDs, 3mm
2 360ohm resistors
1 100ohm resistor
1 8ohm or 16ohm speaker (I used one salvaged from a audio birthday card)
9V Battery leads
Glue Gun or double sided tape