They are shown in this video:
What is the theory behind these LED cell phone stickers? Is there a way I can make them myself at home? Maybe not in those cartoon designs but a small LED which lights up when I place it near a phone and call it.
What is the theory behind these LED cell phone stickers? Is there a way I can make them myself at home? Maybe not in those cartoon designs but a small LED which lights up when I place it near a phone and call it.