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Dave Crabbe
Canada
Registrace 6. 12. 2012
This channel has many instruction videos that I have created during the past several years. My formal background is as an Electrical Engineer, specializing in microprocessor-based electronic design. I have worked in Software development, Operating System support and, as a Cisco Certified Academy Instructor, teaching CCNA level networking courses at a Community College level. For the past few decades I have been an instructional designer and faculty at Nova Scotia Community College in Canada, teaching electronics, PC support, Operating Systems, Data Networks, Intro to creating Mobile Apps for iOS, and various other technology-related courses.
Recently I have purchased a Prusa 3D printer which is providing much enjoyment and speaks to the Engineer in me. Thus you'll also see recent videos about my creations in this area.
Now retired, I dabble in producing drinkable espresso, kayaking and making sure my Havanese pup, Mac, gets lots of exercise.
Recently I have purchased a Prusa 3D printer which is providing much enjoyment and speaks to the Engineer in me. Thus you'll also see recent videos about my creations in this area.
Now retired, I dabble in producing drinkable espresso, kayaking and making sure my Havanese pup, Mac, gets lots of exercise.
Can Tracker Transport?
Since the Tracker mod uses narrower tracks, it just barely fits on the original trailer model from Professor Boots (at: professorboots.com). Proportional throttle might help a bit. Skidi driver is in training!
zhlédnutí: 19
Video
Code Walkthru for PS3 Controller-ESP32 RC SkidSteer
zhlédnutí 31Před 2 hodinami
This video explains the operation of Arduino code for Tracker, a track-tread SkidSteer controlled by a PS3 controller. The code can support a proportional or digital (full on, off) throttle. Also supported is a front-facing LEDbar and/or top mounted backup flasher. The full STLs and build guideline is found at: www.printables.com/model/896776-tracker-skidsteer-track-version-evolution The Tracke...
Tracker: RC 3D Printed Track SkidSteer
zhlédnutí 184Před 9 hodinami
This design is based on the excellent mini-skidi designs by Professor Boots at ProfessorBoots.com . He has made all his designs open source and you can get the Gerber PCB files, all STLs and make your own SkidSteers. The "Tracker" is my evolution of these designs and designed for DIYers who are building models from scratch and want to experiment with proportional throttle, backup lights, larger...
Crab Maze 1 (a horizontal short)
zhlédnutí 260Před měsícem
I couldn't resist the trailer app in iMovie. If you wish to make your own CrabMaze 1, go to: www.printables.com/model/851268-crabmaze-1
Using Burr Tools to find a linear solution to Dan Fast's FASTMAZE 0 puzzle.
zhlédnutí 89Před měsícem
Dan Fast has created 4 exceptional maze puzzles in Aluminum & Brass. Although I created a plastic version of FastMaze 0, it cannot compare to the precision and feel of the metal plates and pins and these are available for purchase on Puzzle Master and other sites. In learning to use Burr Tools, I examine if I can model the FastMaze 0 puzzle on Burr Tools and what linear solutions I might find. ...
Building King Arthur Burr Puzzles using Burr Tools
zhlédnutí 63Před 2 měsíci
The second video that show features of Burr Tools in creating burr puzzles with captive pieces. I am featuring Bedivere and Arthur, two puzzles in a King Arthur series, designed by Stephan Baumegger of Facebook/Puzzleisure. If you go to his site you will find a plethora of beautifully crafted wooden puzzles, which you can purchase. 00:00 Introduction
Intro to using BURR TOOLS for puzzle validation and creation
zhlédnutí 132Před 2 měsíci
This is an introduction to creating a burr puzzle definition using Burr Tools, which can be installed from: burrtools.sourceforge.net . The example in the video shows how to build a burr puzzle called Slider 2, designed by Osanori Yamamoto. The puzzle image is available at: puzzlewillbeplayed.com/555/Slider/2/ . After creating the Slider 2 puzzle in Burr Tools, a disassembly solution is verifie...
Build a SCREECH OWL puzzle
zhlédnutí 39Před 2 měsíci
This is my 3D printed version of Stephan Baumeggers "Screech Owl" puzzle. You can purchase beautiful wooden versions of this and many other puzzles at the site: puzzleisure. This is one of three "owl" designs from Stephan which have a nice degree of difficulty for anyone who is starting out solving burr puzzles. Screech Owl requires the most moves of the 3 owl puzzles, but still is...
Build and Solve the difficult Teetotum puzzle by Alfons Eyckmans
zhlédnutí 34Před 2 měsíci
This is a detailed look at Teetotum and a wonderful 'plate-style' puzzle by Alphons Eyckmans. There is not much information available concerning Teetotum and I don't currently see it offered for sale. It is such a good puzzle I will show how I built my own copy using a split-plate that allowed me to put all parts together without needed to know the puzzle's solution. I could then learn how the ...
Build Neighborhood, a challenging Caged Burr puzzle
zhlédnutí 86Před 3 měsíci
This design from Stephan Baumegger is a challenging, but very approachable caged burr puzzle of 29 steps to remove the first part. I provide a complete build tutorial that will assist anyone who wishes to build more burr style puzzles from any designer. Visit Stephan Baumegger's site at Facebook.com/puzzleisure to view or purchase his beautiful wooden puzzle creations. 00:00 Introduction 02:39 ...
Wourie Puzzle: Piece Orientation & Solution
zhlédnutí 65Před 3 měsíci
This video shows the orientation of the Wourie puzzle by Alfons Eyckmans. It is a very nice puzzle and if you build one, you'll want to know the orientation of the plates in order to put it together. You might want to have someone put it together for you so you can solve it first.
Build your own Interlocking Burr Puzzle using Fusion 360
zhlédnutí 68Před 3 měsíci
This 4 part tutorial will lead the viewer thru building a typical burr, cage puzzle using Fusion 360 and any 3D printer. Fusion 360 is purposely chosen over PuzzleCad for its flexibility. This is designed those who are just starting their CAD design skills and will look at the details of parametric design using component parts.
Tricky Trenta Caged Burr Puzzle & Solution
zhlédnutí 128Před 4 měsíci
Tricky Trenta Caged Burr Puzzle & Solution
Solving the difficult ClimBurr Caged Burr Puzzle
zhlédnutí 38Před 4 měsíci
Solving the difficult ClimBurr Caged Burr Puzzle
ProfBoots' Excellent MINI-DUMP (RC & 3D Printed)
zhlédnutí 277Před 6 měsíci
ProfBoots' Excellent MINI-DUMP (RC & 3D Printed)
A great puzzle gift for Christmas: 3D printed - Crab Conundrum
zhlédnutí 162Před 6 měsíci
A great puzzle gift for Christmas: 3D printed - Crab Conundrum
Crab Excavation gets a FlatBed - RC controlled 3D Printed
zhlédnutí 249Před 6 měsíci
Crab Excavation gets a FlatBed - RC controlled 3D Printed
Cargo Box Challenge featuring Mini-Skidi and the Open Timer
zhlédnutí 311Před 8 měsíci
Cargo Box Challenge featuring Mini-Skidi and the Open Timer
Performance of latest Mini-Skidis (Tires and Arm)
zhlédnutí 239Před 8 měsíci
Performance of latest Mini-Skidis (Tires and Arm)
Description of the Rubber Remix parts from the Mini-Skidi Design
zhlédnutí 383Před 9 měsíci
Description of the Rubber Remix parts from the Mini-Skidi Design
Build this Arduino-based, 3D Printed RoboPutter! Introduction
zhlédnutí 92Před 11 měsíci
Build this Arduino-based, 3D Printed RoboPutter! Introduction
Build this Arduino-based, 3D Printed RoboPutter! Part 2/2: Build Details
zhlédnutí 69Před 11 měsíci
Build this Arduino-based, 3D Printed RoboPutter! Part 2/2: Build Details
Build this Arduino-based, 3D Printed RoboPutter! Part 1/2: Electronic & Parts Detail
zhlédnutí 63Před rokem
Build this Arduino-based, 3D Printed RoboPutter! Part 1/2: Electronic & Parts Detail
que bonito
gracias!
That is mesmerizing to watch
yeah.. I was into Marble Runs for a while. grin
What happened if i close port 80 on clinet pc
I'm not sure what you are asking. Port 80 is open on a server. A client sends a packet to port 80 on a server to get the web page. If the server closes port 80, the client can't reach the web page. A client does not "have" a port 80. They are reserved for web server.
This means all reserved ports can't controled on client pc
@@ahmedabdelaziz7375 No.. you've missed the concept. Reserved ports are published on a list. They are used by servers. Because they are on a list, all clients know what ports to send their packets to for a particular service. So if I want to connect to an FTP service, I know to send it to a proper service, but to specify port 21, the well-known port for FTP. Clients cannot open/close ports on other machines. Let's say you have a Windows computer and you want to enable the TELNET service on it on port 23.. this allows a remote computer to connect to your computer and access. a command line. You now have port 23 "open" and you are listening on that port.. because you are now a Telnet Server. Only you.. the server can close port 23, shutting down the telnet service. A remote computer cannot do that.
@davecrabbe4579 ok thanks sir, i got the point
Awesome instructions. What if you want to print a black cat with white eyes. How would we separate objects that aren't so square and on a perfect level? Do you have a tutorial vid for that?
Thank you so much for making this video. I have a svol svo4 and a creality ender 3 s1 pro but I wanted to learn how to do this on my svol svo4
Glad it helped.. still baffles me why they don't implement a color change by layer height..
Great explanation!! Thanks I have question, at 11:14 you mentioned that the public key from the ICA can be used to decrypt the hashed encrypted part from the NSCC certificate. Can a public key be used for decryption? I am still a little confused on this point.
Either key can be used to encrypt. But the *OTHER* key must be used to decrypt. Which key is used to encrypt depends on the application (digital signatures, encryption certs, etc). However, the private key is *ONLY* known to the person issued. It must never be distributed.
this is it folks!!
why you don't have x10 he speak so slow
yeah.. that's why I didn't get hired as a news anchor
This has been a really fun intro to programming with python, and a great general refresher on how to plan and build a small app. Thanks!
Glad you enjoyed it!
I have the newer version with the fan, but I've yet to see a RH less than 29%. No idea why.
Because it's not efficient. Mine typically won't go under 45% RH, I live in a high humidity area (>65%)
Undoubtedly, the best explanation of PKI and digital certificates. Thanks Dave!
Amazing i was wondering why all datatypes are objects in python and u gave me the reason that it is to implement extensive methods. Thanks
Best explanation about chain of trust I've ever faced.
Best
Thank you very much🙏
Thank you very much🙏
Thank you very much🙏
Thank you very much🙏
best explanation!! well done
Thanks so much for posting that. I just bought a sunlu s2 and I am thinking of adding an additional fan to it. I love teardown videos!
the problem I had was the connection to the temp/humidity sensor that was located under the bottom heating plate.. It was just too unreliable and I thought I fixed it later, but couldn't get it working and just thru it out and bought a PrintDry 3 which is great.. Could have been a broken wire, a really crapy small connector, or the sensor itself. But this is a huge point of failure in these units. Sunlu is likely one of the worst companies for support there is.. You can see that from reports on Web from people buying filaments and any other Sunlu products. Nice product when it works.. but zero support. Good luck with it. I don't think it actually needs a fan.. mine worked well because it was not really sealed.
Great video! I love how you broke it down and walked through it nicely. Thank you.
Thank you, very good explained!
THANK YOU
THANKS A LOTTT
I had the same issue, pushed the cables behind the screen and the thing works again
I got the whole idea and even the trust chain, but I still do not get what is/how a signature works.
Basically a user creates a PKI key pair. A public and private key. The public key can be sent to anyone.. and for large companies, their public keys may be included in an operating system. If I want to "sign" a document, I can encrypt, either a part of the document, or the whole document with my private key and send it to you. I can put my public key on Facebook, if I want. Anyone can get my public key. When you get the document that I sent, you try to decrypt it with my public key.. If you can, then you know I sent it. No one else can encrypt the document in a manner that allows you to use my public key to decrypt.
@@davecrabbe4579 so you encrypt the document itself, not a digest of it, or generate a hash and encrypt it (maybe combined with the other two options for integrity check?)
I dont get it , isnt that violating the SOLID principle of DIP? why don't use abstractions for Dog, Cat, CleanRobot class and use these in a constructor of main class? correct me if I am wrong please.
Thank you for the video. It seems that I have an older revision of the dryer, where the backlight never turns off. Do you happen to know which pin(s) control the backlight of the LCD unit? It is too bright for me.
No.. I eventually threw out my unit after several attempts to fix. Looking at customer satisfaction reports for Sunlu, it appears they have one of the poorest customer support records that I have seen. Too bad because their basic driers work really well, when they work.
Great!
I thought hashes by definition *can't* be "unencrypted*?
You are right.. I didn't use the correct term there.. Hash is a 1-way encryption.. It is not a hash that is placed in the cert, but cipherText that is encrypted with the private key of the CA(ICA) and which can be decrypted with the public key of the CA or ICA.
gotcha, thanks! Great video/pedagogy.@@davecrabbe4579
Can you make otto robot in full detail ,sir
There are lots of videos on YT on making OTTODIY. Look on the PRINTABLES.COM and search for OttoDIY.
@@davecrabbe4579 thank you soo much sir
Best explanation I've seen and searched for
Alright the rubber wheels made that way to easy haha
Nice explanation!
Excellent explanation! Searched everywhere to lean more about how the chain of trust worked in detail - finally found it here! Thank you!
Thanks.. older video, but its all built on the same basic concept, so far.
:39 a simple program 0:55 every step of a program corresponds to an instruction 1:04 each instuction corresponds to binary code 4:50 thread 5:28 think of this as a unit of execution 6:56 scheduler of operating system 8:11 time slice 11:09 proces 12:42 today's CPU 13:06 hyper threading 14:10 multi-core 14:38 multi-CPU (the best solution) 15:11 summary
really good job! you would not tell the difference from outside, so parts are backward compatible?
I had to make the body taller.. but I used the same parts for legs/head.. I did remix the feet so there is an O-Ring underneath. Makes the feet rotation more consistent. The feet could be used on the original Ninja
; )
hi , can i contact you pls ?
Hello, I am assembling your otto, do you have a diagram of where the servos, buffer, etc. are connected. Thank you.
If you look on my Printables remix site you'll see a CODE ZIP file. In the zip is a PDF explaining how to make the Ninja move and a list of what pins I used for all parts.
ok. Gracias y saludos.@@davecrabbe4579
Great tutorial - I so wish that was easier to do in Cura, like in Prusa Slicer, Bambu Slicer, Orca Slicer etc. but your technique is still the easiest I've seen so far in Cura. I'm spoiled using a Bambu Lab P1P at home (with Bambu Slicer or Orca) but we have Ultimaker S3 and S5 in the lab and so we still tend to use Cura there for the tighter integration with that specific hardware.
really weird, Cura. I went on their forums and it was almost blasphemy trying to get color change by layer height.. Something about that is a post-processing issue. They didn't seem likely to add that feature, even though it is something we use all the time in Prusa and Bambu slicer.
@@davecrabbe4579 in this case, your tip worked great for me. I had a model that is 3mm in height, starts in White, switches to Black at the 1mm mark [the layer at about that spot], then prints for 1mm before switching back to White for the remaining 1mm. A pretty simple 2-color "sandwich" type of print that looks pretty cool (it's a double-sided "coin" type of model). Using your idea, I was able to create a 1mm thick "support blocker" that was the same width/depth as the model, and intersect it at the 1mm Z height. Setting the blocker to nozzle #2 (which I had assigned to a black PLA) worked exactly the way I wanted; the print started with nozzle #1 (white PLA), switch to nozzle #2 at the 1mm mark, then switched back to nozzle #1 at the 2mm mark. Sure, it's a little janky but still much better than having to actually break the model into multiple pieces and recombine them in the slicer [with nozzle assignments for each piece]. Thanks again.
Glad that suggestion helped.. Exactly the type of thing I was doing. @@KenRossPhotography
10 year old information and its still useful to this day
Very nice demo! The company i work for is just getting into 3d printing. I got picked to be the guy in charge of it! I started with zero knowledge and an ender 5 plus about 18months ago. We just upgraded to a Modix Big 180x with IDEX. With a $15k price between machines, Its a massive upgrade. Im currently assembling the modix. One of my smaller goals is to use the second extruder and print lettering in a different filament color. This video is the best tutorial I've found to do that. My next goal is water soluble work supports. Thanks for the on point and simple tutorial!
water soluble supports are very hygroscopic.. if you have over 50% humidity, you should put it in a dry box.. You can also use PLA as supports for PETG and vice versa.. as a substitute for actual water soluble supports.. I haven't used but works well for external supports.. If you need support inside the model, then water soluble might be necessary. If you use a Prusa based slicer then color change by layer is much, much easier.. Cura has some philosophical objection to the way Prusa does it.. but it is waaayyy more straight forward.
@davecrabbe4579 OK, thank you for the tips! Hypothetically, if you were handed a list of every slicer software you could think of, what'd be your pick if you knew thre rest would be deleted, and you could only use the one you picked? Price is not a factor. Everything on the list is free.
It's really the one you learn. I've not used Cura much, but it is the grandfather of most of them. I like the ease of use of Prusa Slicer and I've really only learned that software. I've used Bambu's derivative a bit and it is a bit nicer if you have a Bambu printer. @@chrism1130
OK thanks Dave! So far I've only used cura and only on our ender 5 plus. I really like it. The Modix is open source for slicers. Ill start and dial in the Modix with cura since I know it. The Modix budget I requested included Extra funds for getting into paid slicers. I'm still in the process of getting the Modix 180x assembled. I'm hoping to power it up and start the calibration process next week. It's been a really fun project. The print volume is 23.6" x 23.6" x 70.6". Thanks so much for the tips and wisdom! And for reading my rambling giddy posts. Nobody at work has experience in the printer world aside from me. It's fun to get to talk and share with fellow enthusiasts like yourself. You'll probably be hearing from me in the future!
Awesome video explanation. Thanks for sharing your knowledge
Thank you
Great introduction to Threads and multiThreading
Amazing explanation. What I couldn't understand for over 2 months was water clear in less than 30 minutes. Thanks.
Great job!
which microcontroller and shield you are using
Clone nano v3 with its shield from Aliexpress. Likely pics in the Printables link
You the best one explain that