www.logiccircuit.org

I am new to simulators but find this very friendly although can't find the FF's in my palette.
Do I have to make them ? I only need D FF's now, but I saw all kinds in a help screen. What am I doing wrong ?
Soc

Hi Soc,
You don’t have flip-flops on the palette because there are only either primitive gates there or circuits you’ve created. So just create a new circuit call it D flip-flop and it will be on your palette. You can reuse any circuit from other project as well, just open this project in another instance of the program and select symbol of the circuit you need and just copy/paste it to your new project. As a jump start you can use sample circuit from download page there is a digital clock that contain a bunch of useful ones including a few flip-flops. Hope this help.
Thanks,
Eugene

Here is a d flip flop with preset & clear