OK, if you want to know how fast 1.5Hz is, just say, 'One Thousand and One' and that would be your 1 second.
So the 1.5Hz is you saying, "One Thousa..'. And I am hoping they would do 1Hz as well
It's great for putting them as navigation blinkers in small spaces but just like the Candle LED, I suspect that if some were put side by side, they might flash out of sync. Which, would be bad if they're connected on the same surface place. So, you need to place one at the top of the model and one at the bottom. And in a pinch, you can use them as 1.5Hz clock generators too.
|Now you see it...|
|Now you don't.|
And that's, 'One thousan...' for you of 0.6667 seconds