Altered Carbon Cerebral Stack LED assistance

Sulla

Sr Member

RPF PREMIUM MEMBER

• Feb 22, 2018

• #1

I ordered a set of Altered Carbon Cerebral Stack halves on Shapeways. I am getting them in an ultra frosted clear plastic. (My thanks to the people posting on this RPF thread who inspired this little build of mine, and to BrotherWilliam for his Shapeways help.)

I'd like to add light to it but I am terrible with designing my own electronics.

If I just want a simple flickering blue candle effect can I just use 1 or more flickering blue LED bulbs like these on ebay, an appropriate resistor, a small battery and some kind of tiny switch?

Other than masking the inside and making it so I can open it up to replace batteries should I do anything else?

 

Gixxerfool

Well-Known Member

• Feb 22, 2018

• #2

How many are you looking to use? That will affect what your voltage requirements will be. It will also depend on how you want to wire your circuit.

 

Sulla

Sr Member

RPF PREMIUM MEMBER

• Feb 23, 2018

• #3

Assuming I can fit it all in there, if I use 2 each 3mm blue flicker LEDs,

* 10,000 mCd,
* 3V forward voltage,
* 20mA
* with a 3v coin battery

I would not need a resistor right? the voltage is a bit low but it's not like I'll be running it 24/7.

 

Gixxerfool

Well-Known Member

• Feb 23, 2018

• #4

Sulla said:

Assuming I can fit it all in there, if I use 2 each 3mm blue flicker LEDs,

* 10,000 mCd,
* 3V forward voltage,
* 20mA
* with a 3v coin battery

I would not need a resistor right? the voltage is a bit low but it's not like I'll be running it 24/7.

Click to expand...

So 4 total off of a single battery, is that right?

 

Sulla

Sr Member

RPF PREMIUM MEMBER

• Feb 23, 2018

• #5

No, sorry, 2 of the LEDs from a single 3V battery.

 

Gixxerfool

Well-Known Member

• Feb 23, 2018

• #6

Sulla said:

No, sorry, 2 of the LEDs from a single 3V battery.

Click to expand...

Then you should be good. Just be sure to wire them in parallel

 

Sulla

Sr Member

RPF PREMIUM MEMBER

• Feb 23, 2018

• #7

So using those 2 each 3mm blue flicker LEDs,

* 10,000 mCd,
* 3V forward voltage,
* 20mA
* with a 3v coin battery

This is basically the drawing, minus a switch? (did I get the battery polarity backwards? I will watch out for that when I bread board it.

 

xl97

Master Member

• Feb 23, 2018

• #8

It they are truly vF3.0v.. and not 3.4v.. they should work.

Try them out 'as-is'....

then try them with a resistor.. to limit them to maybe 5-10mA see if you are ok with that brightness.. (most time it wont be noticable)..

That will allow for longer battery life.. which I dont think is very much using a coin cell..

does it matter that they will flicker independently?

 

Slash-5

Sr Member

• Apr 22, 2018

• #9

OK, guys....got one coming from Shapways...did we figure out the light?