No joke, I literally realized de Morgan's law (not knowing that's what it was) when you showed the truth tables, wrote some simple code to test it, realized it was correct, and unpaused your video to you telling me what I just did has a name
This is the first time I've heard about boolean algebra! Definitely saves a lot of headaches trying to understand schematics. And the fact that there are online simplifiers is just amazing!
This is literally a great way to learn real life computer science. Taking an AP course at school took so long, but it was worth it to understand the deep down way that computers work. I already knew programming and higher level things. But I learned so much about how computers work at the lowest level possible :3 ty for this amazing series which is actually teaching people real life things in the fun world of minecraft
Are you planning on participating in SoME 3? I really think you'd do great. Otherwise, I appreciate the quality of the content you do make! I already understand most of the concepts you've already taught, but I have learned new insights and am still captivated.
Love your videos! A small tip: when you are showing things (like the truth table for A NOT A), use f3+c to copy your location and angle to your clipboard so that you can teleport back to the exact same spot which I think will result in smoother cuts
I think a good sign that you're doing a good job is that before I watched any of these videos, I had no idea what I was doing with redstone or circuitry in general. Managed to figure out the AND gate just by what you explained. Keep up the good work, man
I just graduated in electrical engineering less than a month ago. You'll definitely experience logic gates, as well as circuits, amplifiers, EM waves, signals, all sorts of fun stuff! The major is conceptually and math heavy, but a blast. Hope you enjoy it!
@@a.b3203 There's a little bit of programming in EE, but depending when you chose to specialize in, you may need very little programming. If you're like me and choose to go into computer engineering, you will need a lot of programming classes.
@@a.b3203there’s def some, but it’s packed into your course-load. You don’t need any prior programming knowledge to get through it. You will learn to code and in my opinion it’s an absolute blast. I prefer it over a lot of my other classes. I’m not EE but a computer engineer. Very similar track tho.
Not really necessary, we covered algebraic logic in the computer hardware module. It covered almost everything in this video and was probably the easiest module overall.
I'm doing a simple minecraft calculator for my science fair project and this is literally THE SERIES! You explain in simple terms so a dumbo like me can understand what's going on. Great job, and keep it up!
Dude very cool series. I found your channel a while ago and every video is so exiting!. Sadly i dont have that much time to see this whole video now but i will be coming back to it, although i know this stuff, it is still good to go back to the basics and see how people explain them and you did a very good job!. See you around.
If I was a maths teacher I would just watch your videos in class (or watch them in preparation). I have experienced so many teachers and even profs making a complicated mess out of these topics giving me a rough time wrapping my head around, though it's really not that difficult. Your explanations are brilliant.
9:10 Yes, this is true with real wires too, but it's not really used because you can have signals going backwards and breaking things. This is true in redstone as well, I just haven't seen it mentioned as much.
Yup, wired OR gate. If you need to avoid that in redstone, you can abuse the fact that signals cannot travel downwards on glass, but can go up. No need to introduce delays with repeaters.
One thing I learned in school where talking about Bool algebra is that the AND is a multiplication (and that make sense since multiplying by 0 the output is 0), the OR being + and that also make sense if we say that 1+1=1… else that was a great video !!
The symbols in the video are rooted deeper in mathematics and logic, the common symbols in computer boolean algebra application would be + and * for OR and AND while NOT commonly is denoted by apostrophe. A + B'C , A OR B NOT AND C
Yea I was gonna comment something similar, I'm pretty sure the v operators for and and or are just for symbolic logic in general, while the + and * are specific for boolean algebra
This is absolutely fascinating to me. I’m a philosophy major and intro to Logic was a mandatory class. The fact the the logic system Aristotle used in Ancient Greece is now used in programming is amazing. It’s also nice that this video was more of a refresher course for me.
15:00 There is an intuition behind that. When the number of aces in odd in a xor gate it gives you 1. In an xnor gate it gives you 1 when its even. So by flipping one input you change the parity of your inputs
A way to find more designs for all the other gates is looking at what a karnaugh map is and how they work. With them you can build any gate from AND, OR and NOT gates.
for the xor gate with comparators, if you just get rid of the block and have to redstone out the back it gives a much longer signal strength, love this series learned a lot!
going to the high school of electrical engineering, and it's so nice because we studied basically everything about this in praxis class - minecraft helped me both year 11 and now 12 with automatics
I tried Boolean algebra with a few really simple circuits and it made them complicated but when I tried it with complicated ones it made it simpler.weird how that works. W vid.
This video is very well made and it covers everything a beginner like me should know, but i have some more tips and tricks that might help the beginners whose redstone machine might not work the intended way or at all. 1. yes, the OR gate is very simple to make, but it shouldnt involve just redstone, at least if you want to build more complex machinery. if you recall the first video, transparent blocks like glass allow the redstone signal to go up the block, but not down, and we can use this here. just place the glass block 1 block above the 2 redstone and it will allow one redstone signal to pass through, but will block that redstone from slipping through the other. this proves perfect for when you want to make a xor gate following the diagram without the machine breaking in the proccess 2. all of these AND gates are great, but theres another one that might also be efficient, and it uses the real nature of redstone rather than being used as a way to pass signal. it involves placing the redstone torch further from the rear, just enough so that its weaker than the 2 input redstones, but also provides a signal above 0. you need to invert the values of the inputs, and you made an AND gate. when both inputs are off, theyre inverted so they emit a stronger signal than the rear (the redstone torch), and turning one of them on wont work as well, because one of them is still emitting the stronger signal, and the rear cant pass through, its only when the two inputs are on that both sides get no signal and the rear passes through, with the output turning on. no extra NOT gate needed. i hope this info helped, as for matt, great video, keep doing what ur doing! ❤
This video is so helpful. I think it might've been easier to use X', XY, X+Y, etc, so it's easier to understand especially for people unfamiliar with boolean algebra.
This is useful for even just electronics and computer science. I think the Redstone laid out next to the Truth Tables really helps visualize how it works
There is also another cool way of looking at Boolean algebra! We can also approach it from set theory and probability, where we would represent the "and" operator as a intersection of two sets, and the "or" operator as the union of two sets, with each set representing a bit. Which would mean that the probability of finding a value in the union or intersection will be the and or or operator of the two variables in the sets! Quick note : the symbol for union and intersection very closely resemble that of the and and or operators.
This is one of the most clear explanations of logic gates I've ever seen, well done! Side note: I respect you so much more now... you used an awesome Creo song for your outro XD
Fun fact! For DeMorgan’s Law, a common mnemonic is “Break the line, change the sign.” This is used because an overline is another symbol for NOT, so !(A & B) = !A v !B.
@@Hexastar-GTAGThe symbol you showed is not that common in boolean algebra. The use that symbol ' or use the upper dash symbol. That's why his mnemonic makes sense
In every single one of our computing classes we use A̅ for "not A", + sign for "or" and mutiplication for "and", that way you can stitch them together as A̅B̅C̅DE for "not ABC and DE". An XOR gate for example; A⊕B = AB̅ + A̅B meaning "A XOR B = A and not B or not A and B"
Excelente video! I believe the compact XOR logic gates uses the reduced expression of it: A XOR B = [A AND NOT(B)] OR [NOT(A) AND B] Because the comparator allows that one lever sets A AND NOT(B) mode or the opposite. Also, the reason of the negation of the XOR gate just need to have one input negated is because of this: If I negate the A, the expression above becomes on that: [NOT(A) AND NOT(B)] OR [A AND B] That is the negation of the XOR, that I call "coincidence AND" that is true only when both inputs are true or false at the same time.
Ahhh, that Bob statement brought me back to good ole geometry class when talking about deductive and inductive reasoning. "Pigs fly when it rains." If raining and do not see pigs flying = false If not raining and don't see pigs flying = true So far some good stuff!
How I'm thinking about the XOR and XNOR gates: they work based on symmetry, like you said. The XOR gates return TRUE for asymmetrical inputs and FALSE for symmetrical inputs. Flipping one of the inputs beforehand also flips the symmetry, and so the XOR gate can now work as an XNOR gate.
For anyone struggling like me bc I’m dumb with the Boolean algebra here’s something that might come in useful: a or b = a+b e.g. a = 0 b = 1, 0 +1 = 1 a and b = a x b e.g. a =0 b = 1, 0 x 1 = 0 Not a = opposite Example Question: A or (B and (not C)) A = 1, B = 0, C = 0 Solution: A + (B(opposite of C)) 1 + (0(opposite of 0)) 1+(0(1)) 1+0 1 Answer = 1
There is a good book about not only boolean algebra, but more algebra as well, called "How To Prove It". I dont remember who made it, but its pretty easy to find.
I wish you would have taught us my favourite tidbit of information regarding nand gate: every other gates can be made solely with nand gates. It can be a fun redstone challenge.
Mods i reccommend: Sodium and lithium (Helps on game performance) World edit (To copy and paste builds) Litematica (Schematics) Edit: Also fabric API for fabric users
I really wanted to get into this things but ı font have much time for this in these days because ı am preparing for the exam to graduate high school but in The summer ı am gonna get into redstone computering. You are encouraging me this video is awesome
No joke, I literally realized de Morgan's law (not knowing that's what it was) when you showed the truth tables, wrote some simple code to test it, realized it was correct, and unpaused your video to you telling me what I just did has a name
if noticed that before 1806 u would be famous and we'd have genericweebs law
@@ben-p5z 💀
@@ben-p5zhahahahaah
This guy and Sebastian Lague have beautifully explained Boolean algebra and logic gates. Wonderfully done!!
Sebastian is a legend. His Digital Logic Sim is amazing for playing with Redstone circuits (or even IRL on breadboards)
True
This is the first time I've heard about boolean algebra! Definitely saves a lot of headaches trying to understand schematics. And the fact that there are online simplifiers is just amazing!
Now i Love mathematics And Redstone Study :'1
what about the buffer tho?
*the buffer gate
@@underdeveloped_loser no im not ready for that :
No
Just wanted to redstone, learned computer science.
i love well-explained minecraft tutorials like this. i finally understand why redstone gates work the way they do
Same
This is literally a great way to learn real life computer science. Taking an AP course at school took so long, but it was worth it to understand the deep down way that computers work. I already knew programming and higher level things. But I learned so much about how computers work at the lowest level possible :3 ty for this amazing series which is actually teaching people real life things in the fun world of minecraft
Are you planning on participating in SoME 3? I really think you'd do great. Otherwise, I appreciate the quality of the content you do make! I already understand most of the concepts you've already taught, but I have learned new insights and am still captivated.
some 3 will be a thing?
@@azteriaaa it has already been announced
That would be genuinely really cool, and he could probably score quite highly despite it being minecraft lmfao
nice it happened
@@epixiel9993 what i was thinking
Love your videos! A small tip: when you are showing things (like the truth table for A NOT A), use f3+c to copy your location and angle to your clipboard so that you can teleport back to the exact same spot which I think will result in smoother cuts
🤣
That's some advance level stuff lol
Oh, that's useful, thank you
Scaaaaaaaaaaaammmm
I might be remembering this wrong, but doesn’t that keybind just crash your game?
I think a good sign that you're doing a good job is that before I watched any of these videos, I had no idea what I was doing with redstone or circuitry in general. Managed to figure out the AND gate just by what you explained.
Keep up the good work, man
Your lessons should be shown in schools!
man, here in Brazil ive learned it in my school
@@arturmg2068 that's AWESOME!!!
I know my old computer science teacher would use this person's videos if she knew about them.
Someone who has struggled with math his entire life just understood this entire video Matt I hope you know that
Ill be studying electrical engineering next year so this will come in very handy 🙂
I just graduated in electrical engineering less than a month ago. You'll definitely experience logic gates, as well as circuits, amplifiers, EM waves, signals, all sorts of fun stuff! The major is conceptually and math heavy, but a blast. Hope you enjoy it!
Good luck!
@@samuelowens000hi, I’m interested in EE but I’m not experienced with coding or programming. Is it a big part of the course? Otherwise I’ll do ChemE.
@@a.b3203 There's a little bit of programming in EE, but depending when you chose to specialize in, you may need very little programming. If you're like me and choose to go into computer engineering, you will need a lot of programming classes.
@@a.b3203there’s def some, but it’s packed into your course-load. You don’t need any prior programming knowledge to get through it. You will learn to code and in my opinion it’s an absolute blast. I prefer it over a lot of my other classes. I’m not EE but a computer engineer. Very similar track tho.
I can see this video being used in university for programming. It's extremely well explained!
Not really necessary, we covered algebraic logic in the computer hardware module. It covered almost everything in this video and was probably the easiest module overall.
I was scared of large redstone builds but I’m learning and I’m invested in this series. Keep up the good work :)
I'm doing a simple minecraft calculator for my science fair project and this is literally THE SERIES! You explain in simple terms so a dumbo like me can understand what's going on. Great job, and keep it up!
Dude very cool series. I found your channel a while ago and every video is so exiting!. Sadly i dont have that much time to see this whole video now but i will be coming back to it, although i know this stuff, it is still good to go back to the basics and see how people explain them and you did a very good job!. See you around.
If I was a maths teacher I would just watch your videos in class (or watch them in preparation). I have experienced so many teachers and even profs making a complicated mess out of these topics giving me a rough time wrapping my head around, though it's really not that difficult. Your explanations are brilliant.
I don't know why, but doing most of the visuals within MC itself gives a degree of charm for what could otherwise be dry. Keep up the excellent work.
9:10 Yes, this is true with real wires too, but it's not really used because you can have signals going backwards and breaking things. This is true in redstone as well, I just haven't seen it mentioned as much.
Yup, wired OR gate. If you need to avoid that in redstone, you can abuse the fact that signals cannot travel downwards on glass, but can go up. No need to introduce delays with repeaters.
Can't you use diodes IRL?
@@theseangle yeah, but I don't think that's normally how it's done(possibly because of the voltage drop across a diode)
Isn't it used in AC?
@@matthias916 could you elaborate?
400 views in 8 minutes??? Man, your community sure loves you
Re-learning all of these truth tables just to do something in a game was actually really fun. You could probably be a good teacher for math!
One thing I learned in school where talking about Bool algebra is that the AND is a multiplication (and that make sense since multiplying by 0 the output is 0), the OR being + and that also make sense if we say that 1+1=1… else that was a great video !!
You can also think of OR as MAX and AND as MIN ^^
@@echoes6092 I tried doing this with 0-9
and - MIN(x, y)
or - MAX(x, y)
not - 9-x
The symbols in the video are rooted deeper in mathematics and logic, the common symbols in computer boolean algebra application would be + and * for OR and AND while NOT commonly is denoted by apostrophe. A + B'C , A OR B NOT AND C
@@JoniGrin so what does xor gate do in decimal system?
Yea I was gonna comment something similar, I'm pretty sure the v operators for and and or are just for symbolic logic in general, while the + and * are specific for boolean algebra
This redstone logic series and Ben Eater’s 8-but computer series complement each other really well; amazing job!!
This is absolutely fascinating to me. I’m a philosophy major and intro to Logic was a mandatory class. The fact the the logic system Aristotle used in Ancient Greece is now used in programming is amazing. It’s also nice that this video was more of a refresher course for me.
15:00 There is an intuition behind that. When the number of aces in odd in a xor gate it gives you 1. In an xnor gate it gives you 1 when its even. So by flipping one input you change the parity of your inputs
A way to find more designs for all the other gates is looking at what a karnaugh map is and how they work. With them you can build any gate from AND, OR and NOT gates.
even with only the first three episodes I feel like im getting better at Redstone so far this series has been so helpful tysm
THANK YOU SO MUCH BRO not only you helped me understand redstone better u also made computer science at school make way more sense!
People pay to take a full semester of a course that is ALL of this. Bro is doing gods work
for the xor gate with comparators, if you just get rid of the block and have to redstone out the back it gives a much longer signal strength, love this series learned a lot!
going to the high school of electrical engineering, and it's so nice because we studied basically everything about this in praxis class - minecraft helped me both year 11 and now 12 with automatics
this is brilliant, im an english student so had absolutely no idea about any of this stuff, but this is super helpful
I tried Boolean algebra with a few really simple circuits and it made them complicated but when I tried it with complicated ones it made it simpler.weird how that works. W vid.
я люблю смотреть твои видео! Благодаря тебе, впервые узнал о двоичном сумматоре)
So far I'm really loving this is series, it's much easier to follow along with than the original
I understand redstone pretty well but I have a very basic understanding in computers. Great videos and i can't wait to watch them all!
Never knew something could make me feel this dumb and this smart at the same time. Great vids!
This video is very well made and it covers everything a beginner like me should know, but i have some more tips and tricks that might help the beginners whose redstone machine might not work the intended way or at all.
1. yes, the OR gate is very simple to make, but it shouldnt involve just redstone, at least if you want to build more complex machinery. if you recall the first video, transparent blocks like glass allow the redstone signal to go up the block, but not down, and we can use this here. just place the glass block 1 block above the 2 redstone and it will allow one redstone signal to pass through, but will block that redstone from slipping through the other. this proves perfect for when you want to make a xor gate following the diagram without the machine breaking in the proccess
2. all of these AND gates are great, but theres another one that might also be efficient, and it uses the real nature of redstone rather than being used as a way to pass signal. it involves placing the redstone torch further from the rear, just enough so that its weaker than the 2 input redstones, but also provides a signal above 0. you need to invert the values of the inputs, and you made an AND gate. when both inputs are off, theyre inverted so they emit a stronger signal than the rear (the redstone torch), and turning one of them on wont work as well, because one of them is still emitting the stronger signal, and the rear cant pass through, its only when the two inputs are on that both sides get no signal and the rear passes through, with the output turning on. no extra NOT gate needed.
i hope this info helped, as for matt, great video, keep doing what ur doing! ❤
This video is so helpful. I think it might've been easier to use X', XY, X+Y, etc, so it's easier to understand especially for people unfamiliar with boolean algebra.
I used to do alot of piston related mechanisms and now as I'm watching ur vids I can see how compact I can make things!
I learn that at schools. You explain it very well !
I'm over here learning algebra for minecraft, instead of preparing for my tomorrow's exam
This is useful for even just electronics and computer science. I think the Redstone laid out next to the Truth Tables really helps visualize how it works
There is also another cool way of looking at Boolean algebra! We can also approach it from set theory and probability, where we would represent the "and" operator as a intersection of two sets, and the "or" operator as the union of two sets, with each set representing a bit. Which would mean that the probability of finding a value in the union or intersection will be the and or or operator of the two variables in the sets!
Quick note : the symbol for union and intersection very closely resemble that of the and and or operators.
Wow, cannot believe it, i saw the video within 21 minutes, good thing subscribed xD.
I have a maths exam for comp sci on Monday so this is basically my revision
This is one of the most clear explanations of logic gates I've ever seen, well done!
Side note: I respect you so much more now... you used an awesome Creo song for your outro XD
Such an amazing video, absolutely clear and precise. It was easy for me to understand even though I am not that good at figuring things out!
I swear to god I am not supposed to keep watching this at 4 AM but I am just hooked to learn it.
As a learning programmer, you explained this with ez!!!
Amazing "tutorial"/explanation
Great video! If you ever dare to make a video teaching the logic on how to convert a real code into logic gates like that, I'd be astonished!
Amazing explanations again, I would have loved it if a video like this existed when I learnt boolean algebra at Uni
Fun fact! For DeMorgan’s Law, a common mnemonic is “Break the line, change the sign.” This is used because an overline is another symbol for NOT, so !(A & B) = !A v !B.
Hey use the the signs [¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬]
@@Hexastar-GTAGThe symbol you showed is not that common in boolean algebra. The use that symbol ' or use the upper dash symbol. That's why his mnemonic makes sense
@@nikos4677 💀💀 IT WAS IN THE VID MATE...
I love your style of writing out info and math in blocks~
+0001 sub bro is better then any math teacher really like your channel wow please post more (i really liked the AI of your last vid)
i figured out the and gate using the demorgan's law you taught us! it made me feel so smart.
WOW! Minecraft redstone logic. PSYCH! EAT THIS AMAZING CLASS ABOUT BOOLEAN ALGEBRA!! Amazing explanation, class grade worthy Matt. You're a genius!!!
In every single one of our computing classes we use A̅ for "not A", + sign for "or" and mutiplication for "and", that way you can stitch them together as A̅B̅C̅DE for "not ABC and DE".
An XOR gate for example; A⊕B = AB̅ + A̅B meaning "A XOR B = A and not B or not A and B"
Excelente video!
I believe the compact XOR logic gates uses the reduced expression of it:
A XOR B = [A AND NOT(B)] OR [NOT(A) AND B]
Because the comparator allows that one lever sets A AND NOT(B) mode or the opposite.
Also, the reason of the negation of the XOR gate just need to have one input negated is because of this:
If I negate the A, the expression above becomes on that:
[NOT(A) AND NOT(B)] OR [A AND B]
That is the negation of the XOR, that I call "coincidence AND" that is true only when both inputs are true or false at the same time.
I am in 8th grade. Understanding it fine, u really explain better than my teachers on school
Ahhh, that Bob statement brought me back to good ole geometry class when talking about deductive and inductive reasoning.
"Pigs fly when it rains."
If raining and do not see pigs flying = false
If not raining and don't see pigs flying = true
So far some good stuff!
as a student who has computer science major this feel nostalgias
as someone who's gonna enter university soon, this feels fun.
Thank you SO MUCH!! I can use this videos to study cuz they're cooler than the book! :D
I like how he managed to make math interesting
You are the best! Thank you for the simple explanation! But I want to see the advanced world of comparators... can you please make!?...
In 1.20...
You explained it so good!
you are a incredible teacher
I definitely need to practice Boolean Algebra. Also, I now want Mojang to create items to be the other gates in the next update.
Wtf a gaming video teaches me more then my teachers❤
Appena iniziata la prima superiore informatica e mi stai aiutando molto
Incredibly well-explained 🏆
Thank you Good Sir 🎩
How I'm thinking about the XOR and XNOR gates: they work based on symmetry, like you said. The XOR gates return TRUE for asymmetrical inputs and FALSE for symmetrical inputs. Flipping one of the inputs beforehand also flips the symmetry, and so the XOR gate can now work as an XNOR gate.
I am studying my logic circuits course at uni with these videos lol
For anyone struggling like me bc I’m dumb with the Boolean algebra here’s something that might come in useful:
a or b = a+b e.g. a = 0 b = 1, 0 +1 = 1
a and b = a x b e.g. a =0 b = 1, 0 x 1 = 0
Not a = opposite
Example Question: A or (B and (not C))
A = 1, B = 0, C = 0
Solution:
A + (B(opposite of C))
1 + (0(opposite of 0))
1+(0(1))
1+0
1
Answer = 1
I would recommend the organic chemists video on this for further insight
I didn't know that we actually use math in redstone.that make sense!
The xor and xnor thing makes sense if you think about the fact that xor means not equal
WE SKIPPING SCHOOL WITH THIS ONE 🗣️🗣️🔥🔥🗣️🗣️🔥🔥🗣️🗣️🔥🔥
Can't wait for the next episode!
I already love math, thx for making me love it even more
XOR Gate instructions unclear, accidentally gave birth to an unexpected NAND Gate
Same, it feels like there should be a NOT gate at the end of it
This is literaly just computer sience and I love it.
Literley just learning this stuff in my engeneering class the other day and thought about how it could help in redstone.
1:10 To make an or gate, combine AND with NOT to make NAND, then use NOT in both inputs of a NAND gate to make an OR gate.
LOVE this series Matt
De Morgan's is such a life saver for simplifying circuits
9:52 I was thinking about line with 2 repeaters which was locked by two NOT gates and when you unlock them you get a signal through
1:32 A with a gun
1:40 A robbing A
For those who are really interested in simplifying boolean circuits/equations/truth tables, I recomend looking for karnaugh maps.
There is a good book about not only boolean algebra, but more algebra as well, called "How To Prove It". I dont remember who made it, but its pretty easy to find.
5:29 bro
6:24 bro definitely said it 😭😭
I wish you would have taught us my favourite tidbit of information regarding nand gate: every other gates can be made solely with nand gates. It can be a fun redstone challenge.
Thank you, now I got maths^redstone knowledge in my brain(really I appreciate it thank you)
thanks for video its easy to understand and i learned a lot from this video
Mods i reccommend:
Sodium and lithium (Helps on game performance)
World edit (To copy and paste builds)
Litematica (Schematics)
Edit: Also fabric API for fabric users
This would've been very useful for my computer science exam yesterday T~T
Cool tthing about NAND (also NOR) is that you can build any other logic gate using only NANDs. :)
i never thought redstone would make me love maths in my life
This is the first thing I learned with logic.
I really wanted to get into this things but ı font have much time for this in these days because ı am preparing for the exam to graduate high school but in The summer ı am gonna get into redstone computering. You are encouraging me this video is awesome
9:32 I tried to make it with a piston that blocks the signal from the other input. 😢