Hi again,
Looks good to me, as I said, so many wires can be messy. There may be one slight problem....because the relays are 'latching', say relay 2 is on, and you hit button 1...using this idea, relay 2 should reset and at the same time, relay one should latch on....but what happens if you hit button 1 again? I think relay one will turn off. (latch-on, latch-off). That way, you'll have no relays latched, until you hit another button.
If you want
at least one relay on at all times, then things get a little complicated. That would require you to 'disconnect' the input to the latch circuit when the relay is on, so if the button for that relay is pressed while it is latched, it cannot 'unlatch' it. It can only be reset when another button is pressed. If this is exactly what you want, it can still be done simply.
Btw, I was thinking about just connecting wires to the PCB, good call with the diodes
That's always a good idea, you might also want to have 'pull-down' resistors on each flip-flop reset, so that it places the resets in a 'known state', saves the relays reseting because of noise.
So, with a few diodes and 4 resistors, it could be soldered on a bit of strip board, with 4 inputs, and 4 outputs (exactly like your lovely MS paint schem
) It'll make life easier since you only need to solder one wire to each flip-flop reset, and a wire to each Rx output. Less soldering to the board reduces the risk of ruining the PCB.
My skill level still a bit low, so pardon my lack of knowledge. If this works, It will be tottaly awesome
Hey, we are all constantly learning, and this sort of problem solving is a great way to do it, find a problem, analyse it, find a 'simple' solution. It requires less intelligence to come up with a really complicated idea, simple is what we want (cheap, easy to build/modify, and effective in its job).
But seince these are dual flip flops, I dont see 4 individual reset pins
Check
https://www.electronics123.net/amazon/datasheet/k180.pdf page 4.
There are four flip-flops in total, so 2 dual packages. The resets are on pins 6 and 8. Make sure you get the right reset, the schematic (thankfully) is quite clear.
One more thing...the resets are all connected to GND on the PCB. We don't want that. So, you can either bend the pin of the dual flip-flop IC so it doesn't go into the PCB hole and then solder a wire directly to it....or....cut the track that connects it to GND and solder a wire to the pad. For each dual FF, because its a standard logic IC, pin 14 is VCC (+5v) and 7 (bottom right) is GND. The two resets on each IC are on pins 6 and 8, both right next to pin 7. I would say, cut the track between pins 7 and 6, and pins 7 and 8. I small knife should do it. And if you want to connect it back together again, you could just add a 'solder bridge' between the two cut tracks. I might copy the schem from the *.pdf and highlight exactly what needs to be cut/soldered.
Good Luck, and take care,
BuriedCode.