Hi,
I want to create a simple toy for children that can respond to a child's actions.
I want the toy to look like a character with emotions : it can be happy, sad, etc..
I'm looking for a way to show the emotions through the 3D printed shell. I like the way the object in the picture does that. I was wondering if they use leds or lcd screen or anything else.
Do you have any idea ?
Thanks
Catherine
That picture shows the technique of using thin areas of plastic surrounding thicker areas with a single LED illuminating it. The lower display of course has a normal seven segment LED display.
8x8 led matrix on a MAX7219 chip will do what you want.
Throw some light diffusing plastic over it to smooth out the dot distinction.
I've actually made such a thing, design each face as a frame of animation and it can make all sorts of expressions and even 'talk'.
I can share the code I've done if that's the route you choose to take.
Here is a face that changes automatically in time to the speech:-
