Learning about Logic Gates
NOR gates
NOR Gate Example from The Wonderful Wizard of Electronics
NOT gate diagram. Input on the left, inverted output on the right. Input X
Input X 0
Output X̄ 1
XX̄
01
10

Click & hold the input dot to send a 1 into the gate.

And Here is the SR Flip-Flop from The Wonderful Wizard of Electronics Appendix

SR Flip-Flop diagram. S (Set) input bottom-left, R (Reset) input top-left, Q output top-right, Q-bar output bottom-right. Input R (Reset) Input S (Set)
S 0
R 0
Q 0
Q̄ 1
SRQQ̄
00QQ̄Hold
1010Set
0101Reset
11✗✗Invalid

Click & hold S (bottom-left) to Set, or R (top-left) to Reset. Release to see the latch hold state.