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Step 6The battery
Very important in this kind of small interactive things is the voltage and the battery.
Where can a bride hide the batteries?
How much batteries is a bride prepared to carry around dancing?
I found a nice rechargeable battery pack at sparkfun:
http://www.sparkfun.com/products/341
As you can see on the picture it is very thin, you have to buy the charger too.
We have to check the time it will feed the butterfly!
But you can do it using two small AAA batteries too.
This bride will not have the batteries in her dress (as I proposed) she will carry the batteries hidden in ...
... her hair! (That is what we call a "coiffure"!)
Measuring the voltage of the rechargeable: 4.2V, this is too much for the servomotor :-(
So I'll try two or three coin cells, which are even smaller.
In the end I decided to make a special butterfly casing, which you can see in the second picture of this step. It is made of perspex which you can mold and shape by heating it up. Quite a job though, for a simple casing! But this has to be carried around in the hair (coiffure!) of the bride. So a bit of attention to the design (you recognize the butterfly?) is not wasted.
Where can a bride hide the batteries?
How much batteries is a bride prepared to carry around dancing?
I found a nice rechargeable battery pack at sparkfun:
http://www.sparkfun.com/products/341
As you can see on the picture it is very thin, you have to buy the charger too.
We have to check the time it will feed the butterfly!
But you can do it using two small AAA batteries too.
This bride will not have the batteries in her dress (as I proposed) she will carry the batteries hidden in ...
... her hair! (That is what we call a "coiffure"!)
Measuring the voltage of the rechargeable: 4.2V, this is too much for the servomotor :-(
So I'll try two or three coin cells, which are even smaller.
In the end I decided to make a special butterfly casing, which you can see in the second picture of this step. It is made of perspex which you can mold and shape by heating it up. Quite a job though, for a simple casing! But this has to be carried around in the hair (coiffure!) of the bride. So a bit of attention to the design (you recognize the butterfly?) is not wasted.
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