I am working on a design. It consists of 6ea 7 segment displays that has numbers manually set with some bcd switches and some CD4511 decoder drivers.
I posted earlier a picture of the deisign. The design is working as I planned.
I would like to add another feature. This feature is to turn off the numbers and turns some words for a short time. Once the switches are manually set they remain in view for about 45 minutes, with no changes. I am aware that if words or pictures are visible for a very short time the human mind can see it.
So my question is: How fast must is change from the normal view of the numbers to the words. My second question is, Is it lawfully okay to do this.
I remember this thing happening in movie theaters so the people there would be encouraged to get goodies from the theater.
Thanks for looking
I posted earlier a picture of the deisign. The design is working as I planned.
I would like to add another feature. This feature is to turn off the numbers and turns some words for a short time. Once the switches are manually set they remain in view for about 45 minutes, with no changes. I am aware that if words or pictures are visible for a very short time the human mind can see it.
So my question is: How fast must is change from the normal view of the numbers to the words. My second question is, Is it lawfully okay to do this.
I remember this thing happening in movie theaters so the people there would be encouraged to get goodies from the theater.
Thanks for looking