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I thought this might be a good use for that old cell phone you have laying around after you upgraded to 4G LTE, ASAP, PDQ. The amount of work required will depend on what type of phone you have and how much of the insides you want to keep.
What you will need...
Cell phone
resistor 100 - 220 ohm
LED
Battery
Battery holder
Switch
Extras...
Wire
Solder
Electrical tape or shrink tube or Silicone 100%
--- I used liquid tape, very handy.
I had some slow RGB LEDs and a few ideas. I did some tests and narrowed it down to two ideas. I couldn't decide, so I used both.
The first LED pokes through the top lid. With the LED on and pointed at the ceiling in a dark room, you get a Red, Green, Blue light show on the ceiling. The second idea involved shinning the LED on crumpled tin foil.
What you will need...
Cell phone
resistor 100 - 220 ohm
LED
Battery
Battery holder
Switch
Extras...
Wire
Solder
Electrical tape or shrink tube or Silicone 100%
--- I used liquid tape, very handy.
I had some slow RGB LEDs and a few ideas. I did some tests and narrowed it down to two ideas. I couldn't decide, so I used both.
The first LED pokes through the top lid. With the LED on and pointed at the ceiling in a dark room, you get a Red, Green, Blue light show on the ceiling. The second idea involved shinning the LED on crumpled tin foil.
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Remove the battery from the phone. Disassemble the phone, this may be a little tricky as they don't use normal screws. You may be able to use the original battery if you can find a way to charge it. I chose the button batteries and holder I had left over from another project. Collect your parts, switch, battery ect. and plan your placement in the phone.
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"Beam me up, Scotty"
You may want to change the polarity of your diodes in
your schematic drawing above.
If you go here - you'll know what I mean.....
http://en.wikipedia.org/wiki/LED_circuit.