Multiplication | Logical Redstone #13

In this episode, I cover binary multiplication and two ways to make binary multipliers.

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0:00 Regular multiplication
1:17 Binary multiplication
4:36 Building a Combinational Multiplier
7:59 Building a Sequential Multiplier
14:08 Subscribe!

[Elderberry]

Man you are a really good teacher. I'm not unfamiliar with CS stuff (M.S. in engineering, and have to program a lot), but you really make things just really straightforward and easy to understand, and I'm learning quite a lot. I'm passionate about effective tutoring, and you're quite inspiring. Every single one of these videos is a treat. Keep at it!

[llama]

I thought multiplication in binary was a lot harder. Enjoyed the video!

[enderchickengamer]

usually math gives me headaches but matt has added life and color to it.

[mattbatwings]

Which type of multiplier is your favorite and why? :o

[choonyongtan]

Your explanations are very good👍
I never realised that binary multiplication was so easy

[memereview]

In my University math classes calculators aren’t allowed. At least in the easier classes that I take. This video taught me a much easier way to do multiplication on paper/in my head. A big long multiplication problem is way easier when you just either do the top number, or nothing over and over.

[tyronium]

These are the type of tutorials we need on YouTube thank you matt

[offlinedino]

I spent an hour trying to figure this out and then you came out with the video explaining how. Thank you

[boas_]

Wow didn't know binary multiplecation is that simple, cool!

[looter]

I know this video is about Multiplication and not about displays but I’ve an idea(some other people also already had this idea). Why won‘t build displays with maps, I mean it would be genius because Maps can have different scales, so you can have for example on stage 2 or 3 for one Pixel on the Map more Space, because one pixel on the map, would represent a area of let’s say, 4 x 4. But as I know, not the entire 4 x 4 Area would be used, only one specific Block of this area would be used. This technique, would allow you to build a real display, which would only be 1 Block big for the user. You could put a Map on the Wall so the user does not need to look at a very big screen. There’s also another thing which this technique would allow, you can make use of coloured displays because for every pixel on the screen, the contraption behind it can make use of an 4x4 area from the ground to the build limit(if you want so). I have also already done some research on the internet, there isn’t much about it but I’ve found one guy on PlanetMinecraft, who already had the same idea as me and built a 16-Color 32x32 Pixel Minecraft Map Display. It was originally build in version 1.12.2 but I’ve tried it in 1.15.2 and i think it should also work in Higher Minecraft Versions. It would be awesome if you try it, no you need to… I think this technique has a lot of potential and you should give it a try. Thank‘s! As I was Searching for this, I found more Displays, already with display controllers…


I hope you will be inspired…
LG Looter

[lima]

Binary multiplication sounded scary.. until I saw this :] NIce job, keep up the good work!

[ncolyer]

like ik that multiplication is just repeated addition but somehow this is even simpler than that in binary, so cool

[TH_]

matt's content is soo high qality :) proud to be here before 100k

[alexandregagne]

This is an amazing serie! You are so great, I learned so much. I subscribed. Can't wait for more!!!!

[_marshP]

One thing to note is that the maximum product for any two n-bit numbers is 2*n bits.

two 4-bit numbers multiply into an 8-bit number, but not necessarily the maximum number possible for 8-bit numbers (0b1111*0b1111 = 0b11100001 ; 15*15 = 225)

[d_]

Why are you saying you weren't satisfied with this series? You didn't need a LRR, this is awesome! Just came back to it cuz I needed your explanations, and my opinion hasn't changed since you published this video...

[SparkLinkDevelopmentStudio]

I built this exactly as shown in the video but it just flashed on and off repeatedly on certain lines. The accumulator itself worked perfectly, but the full thing with control circuits and everything was just flashing repeatedly.

[Nae_Ayy]

Yooo new upload.

Have you heard of ternary logic? I've been messing with the concept using redstone signal strength. I can't find any layman-oriented information regarding ternary logic circuits, though, so all the gates I've made have been from trial and error, and they're very slow lol.

[rizalardiansyah]

Hmm.. Does that means the sequential design is slower than the combinatorial? So it trades speed for simplicity, right?

Thank you for making these tutorials!

[gabilaze]

Can't wait for the division video, so I can finish my own calculator project ^^