Well the D Flip-Flop has (in my case) a frequency input of 1kHz and a frequency output of 500 Hz. That is because the D Flip-Flop has an "own current"... What i mean is every time when you power it it changed the HIGH and LOW thing:)...
So... I'll write it so that you can understand it better...
Current: On
Flip-Flop:On
Current:Off
Flip-Flop:On
Current:On
Flip-Flop:Off
Current:Off
Flip-Flop:Off
Current:On
Flip-Flop:On ... And so on...
Enjoy :)
