I built the circuit below on my breadboard. I've checked every connection and it doesn't work. The thing I didn't know how to do was connecting the output (a LED) and the input. (a button) I did something pretty random and, no surprise, it doesn't work. My question is how do I connect the input and output and can I do it with a button and a LED?
I will use this as a SR Flip-Flop, I found it can be used this way here.
Also, I've used 3.3k resistors instead of 3.9k resistors. Is that bad?
The LEDs should go in the collector circuits for each transistor, as shown above. The 3.9K resistors should be reduced (470 Ω shown here) to provide sufficient drive for the LEDs.
Other than that, I would leave the rest of your circuit as is.
This circuit also has separate switches for the set and reset functions.
Other ways of triggering are as follows:
The circuit on the left uses a pushbutton, and connects up to the Trigger input of your original schematic.
The one on the right uses a SPDT switch; you could also use a On-Off-On center off switch.
