Those resistors are not part of the flop, they're just there to limit current through the LEDs to make the state visible. See here for a D flip flop: https://en

Those resistors are not part of the flop, they're just there to limit current through the LEDs to make the state visible. See here for a D flip flop: https://en.wikipedia.org/wiki/Flip-flop_(electronics)#/media/File:Edge_triggered_D_flip_flop.svg https://en.wikipedia.org/wiki/Flip-flop_(electronics)#/media.... My point was about Vcc and ground was just meant as a response to the "power-related analog components". If you don't already have a regulated power rail even a single NAND gate won't be able to do it's thing, so its definitely a requirement but if you say you are allowed a functional NAND gate you must be allowed power rails as part of that.