iPhone to drive LED
Khankll, yes you are right. I would have to transform the AC before converting it to DC.
Davenn, i would like an iPhone to power the LED and have a custom song/app manipulate the output.
I was also considering using a battery to drive the LED and connect the audio...
Is it possible to make a LED flash with a standard 3.5mm headphone jack as the only power source?
I was thinking that you would do the following:
1) write a program that would maximize the output from the headphone jack.
2) Use a bridge rectifier to turn the headphone jack from AC to DC...
I apologies if this is elementary, but I took apart an ipad dock/stand and found that three of the control buttons on a pcb is attached to a 1"x3" copper sheet (which is glued to the plastic housing).
Is this used for ground? I don't understand why they would do this if it is ground, since...