Let's admit that your second suggestion is far from simpleMake a handheld POV device to display messages in the "air"....
or a propeller clock:
My .02
Let's admit that your second suggestion is far from simple
Wouldn't the second one need some type of code routine to address the fact that the outside LEDs are spinning faster than the inner ones and Don't need to be on as long as the inner ones?Actually it is not more complicated than the first one..... the only difference is a motor spins the propeller clock to display messages and the time, for the hand held it does the same thing except with "arm" power .... the coding is the same for both on how they display the messages, and the circuitry is practically the same also, the Hand Held uses a pedometer switch to start the display, and the propeller clock uses an IR LED/phototransistor pair...
see the description here >>>> http://www.morse-code.com/id44.htm
@ the top of the page there are links to other LED based projects....
My .02
by Jake Hertz
by Jake Hertz