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Can you please provide more detailed descriptions for code converters and comparators?

Your restriction is not clear. What does it mean you can't use curtain things: can you build them from logical gates and then use them or even this is not allowed? If it's possible to build your own flip-flops, then it's possible, in relatively easy way to build a project you described. Without them...

Hi, I suggest you start with familiarize yourself with the application. You can read first two help pages: https://logiccircuit.org/help.html Once you know how to place elements and draw the wires you can start cleaning your design. Just place your parts in roughly on the same places where they are ...

I can only think of a counter with reset signal bringing it to 0. When there is no reset signal then counter counts up to some value and this is the indication of a loop. The reset signal is your watchdog.

Hi Tobias,
You've used a lot of acronyms that I have no idea about. Maybe you can just formulate what circuit do you need and i will try to help you.
Regards,
Eugene

Hi, The message is pretty self-explanatory. You have AND gate that are located at point 30x20 on the grid. It has input pin named x1 - probably second from the top, if you did not rotate it. This pin is connected output of more than one other gates. In order to locate the AND gate in question click ...

Hello,
I've added the shortcuts to buttons. Please download new version.
Please note not all the key combinations are available. For example arrows, home, end, ins, del are not available.
Happy designing.

Thanks, that is good idea. I'll see what can be done.

No, you can't do that without changing the source. The execution performance will not suffer from such expansion, but the visual might. It depends on how many element you will have. BTW, you can make you circuit bigger than the drawing boundaries now just move elements beyond the white space. Also y...

As I have mentioned before you have multiple gates outputs connected. That is why you have this error. For example on the image above you have almost all AND gates and XOR outputs connected. Not where you have your red circle, but where you have them connected to the output pins. You can see it more...