Thanks to Joaz from http://reprapsource.com/ my PCB heatbed design is right now in production 
Thank you man! Check it out how beautyfull it is You can preorder it from http://reprapsource.com/en/show/6403 at 29,99 €!!!
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PCB Heatbed in production
prusajr
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DJ Michal Prusa - Essential mix
michalprusa
Finally some music stuff! But we are DJ’s blog, right? Enjoy
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dj Guido Gabo
tracklist plz
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DJ Michal Prusa
Tracklist will be available in short time
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Heatbed MK4 - we are almost there (simple, cheap, hot-swappable)
prusajr
I’d like to post some news about our new heatbed. Completly different approach. I’m working on this idea for nearly two months, inspired by neufeld.newton.ks.us/electronics/?p=864. You can find actual files on Thingiverse:2172. I will publish it under same license as RepRap is at the end of development.
It’s configurable for 12, 24 or 48V. It generates 110W of heat. And I’m most proud that its hot-swappable by magnets. You can see how it works on video or my flickr page.
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New printer we have - ShaperCube
prusajr
We have new printer and I have to say awesome one. ShaperCube. It’s completly made of Aluminium. You can see few pictures of printer at his creators flickr. Joachim Glauche’s flickr.
Electronics
Machine is using Arduino Mega as main board controlling Stepper Boards 1.2 and DC board which is controlling extruder etc.Btw. we are first who ever build ShaperCube
You can see our timelapse video of building the whole thing.
Czech (retarded) press about Makerbot at CES
prusajr
Lol, today when I was checking news at my custom Youtube.com homepage I’ve found video from CES about Makerbot from one of our Czech techzines Živě.cz. And it was soo much fun that I’ve almost pissed myself from laught 
I’ll try to translate it, at least the funniest beginning.
This, what in fact looks like wooden kit, is actually a wooden kit and its kit for making things. You’ll get box of bricks and you can build your own kit. …
… interesting thing is, that it’s not a complete product but it is actually kit, you’ll get box of pieces and you have to assemble it by yourself. …
No word about 3D printer, no word about open source, just lame repeating We are so much doooomed here in Czech Republic …
Here is how it should look , thank you Wired!
Heated RepRap print bed MK2
prusajr
Building heated print beds is very popular these days, so I want to publish our 2 months findings. You should first read Look ma, no Warping, Nopheads Hot metal and serendipity, Zaggos Canned Heat and Zaggos Raftless. Now we have Heated Print Bed MK2, first design wasn’t as durable as we wanted (sandwich consist of 2pieces of acrylic) and the heat wasn’t spread evenly. (More …)
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Forrest Higgs
A floor tile! What a lovely idea! I’ve got pretty everything else I need to make one.
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Erik de Bruijn
Hi Josef, looks like a big improvement. I also like the tile, especially for stability reasons (mechanical and thermal robustness).
It seems like quite some of the heat would be transferred downward into the tile. That it spreads the heat, which is useful, but it’s also heat loss a the same time. If the Aluminium spreads the heat enough already, maybe a glass-fiber mat could be placed between the tile and the filament. It also makes sure that the nichrome wire is evenly pushed against the aluminium.
P.s. good luck with the bowden setup
Marcus Wolschon
I´m trying to so a similar design at
http://www.bitsfrombytes.com/fora/user/index.php?topic=398.msg5148#msg5148
but without replaceing the bed-holder and with cheap commercial heating-pads that can be powered by an off-the-shelf universal laptop power-supply (asjustable voltage, temperature controlled manually).
This calls for drilling holes through the floor-tile.
I´ll try coper for the surface and long screw-holes +1 sunk screw in the middle.
If that fails I´ll go with custom clamps like you did.
AKA the A
Co takhle pár detailů celý mašiny?
Look ma, no WARPING! Heated RepRap print bed
prusajr
Since we have RepMan (kind of RepRap) 3D printer I was thinking about printing large objets. Of course you start with small things like minimug. But as you start learning how to get good small prints you’ll try something bigger and you will probably see large warping. It’s caused by different temperatures in the object. Professional machines uses heated print chamber to avoid this, but we can’t of course build heated champer since the printer is made from plastic or plexyglass. Great compromise is to build heated print bed. I was inspired by Zaggos work in Pleasant Hardware. But he has MakerBot which has only 10×10cm print bed. RepMan has 4times bigger. I wanted to build my print bed as quick as possible so I used ressistive wire which I have for a while, then some plexyglass and epoxy glue. It build like burger, in three layers 1)Plexyglass 2) ressistive wire + epoxy glue 3) plexyglass. After you do make this you should put it on the straight place, put something heavy and straight on it and leave it for few hours.
Don’t ask me to exact ressistance of the wire etc. I dont know it
You just should make sure that whole print bed rig consumes about 45-55 Watts (you can use more for quicker heating, but you can melt the plexy, so be carefull) for this size, for Makerbot should be enough 25-30 Watts.I’ve added (dont forget to drill and sand the place for sensor and cable in bottom piece of plexy) temperature sensor which is done by my brother, so I know if it’s warm enough. BTW even plexyglass expands when it’s heated, I’ve had to place some spacers between print bed and lower support plexy contruction. You know, it’s a prototype, but it works
I’ve tried to print when the bed was about 70°C, its quite enough. But higher temperature could be better, I’ll test it later.
Here you can se the video from my first printing of „x-carriage-lower_1off“ Mendel part.
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Roboteernat
VERY NICE! will be making one for my makerbot shortly!
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Calvin from twin over full bunk bed
Its good to find a source of information that can be useful, especially when looking for something to occupy me,thankyou for your help and being of assistance, there’s a good wealth of information here. When you have more i’ll be happy to view it.
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Erik de Bruijn
Yes. Sandwiching between same thickness plexiglass (PMMA) will balance out the warping force of both of the sheets. When PMMA is heated unevenly, it will curl towards the cold side. If the hot side is on the opposite sides for both sheets, both cancel eachother out insofar that the top and bottom of the assembly are the same temperatore.
Marco
Hi, what kind of thermostat and sensor you use for read and limit the temperature? Thanks Marco
prusajr
SMT-160
Marco
Thanks for your reply!! where i can buy the complete circuit with display, or have you build it? in this case can you give me the schematic circuit? thanks!!! Marco
iPhone controlled R/C car (UPDATED)
prusajr
(Originally posted on 5th of September 2008) It’s still not even a week since I bought a new iPhone 3G and during this time my brother and I did a lot of cool stuff. The iPhone with its accelerometer and multitouch display is ideal for making gadgets. When I got it home, we started thinking about some cool demos which we could make. Incidentally we found an old R/C car model Have you ever seen anything like this? I hadn’t Did you ever think that an iPhone could do this? Enjoy!
Update (31st of July 2009)
iPhone Hacks
Hack was very popular, biggest success is one chapter in iPhone Hacks book (O’reilly). It’s great experience and I want to say thanks to Damien Stolarz and Brian Jepson.
Many people asked me about source code, here it is. Documentation and howto are in iPhone Hacks book.
OS 3.0 for iPhone brings some new opportunities, including some bluetooth stuff. But unfortunatelly not SPP, so WIFI is still only chance to send something out from iPhone :-/
Video
iPhone controlled R/C car from Josef Průša on Vimeo. Same video on YouTube.com .
Controlling is very easy with the iPhone 3G. It has five buttons, four of them you can use for traditional „driving“ and when you press the last one, it unlocks the accelerometer control in the same way as in many driving games available on AppStore. Realization of this project did not take a long time, only one afternoon. Technically it is realized in a hell-bent way, but obviously it’s functional. Schematically: iPhone (OSCemote) → WiFi → PC → Max/Msp → Serial port → Arduino → Original controller. If you have some other cool ideas, leave it in comments. We can surely realize it .
OSCemote
OSCemote is application which sends data from iPhone to PC. It does it thru WIFI using OpenSoundControl protocol. You can buy it in AppStore ore try free lite version (unfortunately without accelerometer support 
) By the way, some big and complex audio softwares are compatible with OSC standard. For example, Traktor 3 by Native Instruments can sync tempo over OSC. You can download test patch here. For functionality you have to download Max 5 runtime.
OSCemote
Max/Msp
On PC connected to network is running Max patch, which catches data from iPhone, converts it into simpler form and send it thru serial port to Arduino.
Max/Msp is generally used for audiovisual instalations, but also can do crazy things like this project .
Max/MSP 5 patch
Arduino
Arduino is simple development kit with
microprocessor. Arduino process data from Max and next simulate switching on
real R/C controller using transistors.
Arduino controlling original remote
PS
If you like our idea, please Dig it!! or link it from your blog
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Jannine Cayaba
hi, can you help me im jannine and i am at my final term here in college, im taking up computer engineering, and your topic is one of my topic also for my research i would be glad if your able to help me finish it…
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Wholesale
Arduino process data from Max and next.
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prusajr
Arduino process data from Max and then controls original remote control by four switching tranzistors
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Hugo
Hello, I am very interested in your project, it ’s great. I already have the first edition of iPhone hacks, and your project doesn’t appear in it, I would ask you if it ’s possible to find a solution for you to provide me with the documentation of your project.
Best regards. -
prusajr
Its in the book, but under „Controlling real word with iPhone“ or something, I don’t have the book with me so I cant tell you right page number
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Hugo
Thank you for responding so quickly. Indeed, the tutorial begins on page 412 of Iphone Hacks. I finished the software and radio controller part, I am juste whaiting for the Arduino module which is delivered.
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Hugo
I have a little problem with the remote, in fact in place of switches, I have potentiometers. I, would know if it ’s possible to use this method with potentiometer.
And if later it is possible to modify the program to have a progressive motor and direction control in place of a control all or nothing.Best regards
Hugo -
Khaled
Hello,
I have download and test Max Runtime with OSCemote it’s works very well thanks you but how to transfer the signal on the serial port ?Best regards
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Catarino
hello prusajr, recently did a project similar to yours, have command car connected to computer, iphone connected computer by wifi and use oscemote to control it. i have a webcam on car and wonder if you can use the Accelerometer and receive video signal from webcam at the same time. idea was control car and view full video on the iphone at the same time? Any app to do that?
Best regards
Catarino
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prusajr
@Catarino: You will probably have to program your own iPhone software to do this
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Thomas
Hey, what transistors did you use? I am trying to do something similar.
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sjoerd
Hello Prusajr,
I like to know how you connected the motorized slider to the arduino and how the program works.
Best regards -
sumesh
hey can any 1 tel how to build this car, plz give me full information on this or give me link where i can find it
mail me at sumeshjadhav@gmail.com -
WLee
I am just curious. What is the range of the remote control car and is it line of sight only?
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jannine cayaba
hi can u send me again the software usend to me before the oscemote and the otherone u gave me? thnx so much sir
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Ozirock
I done a similar project using a Velleman k8055 usb interface board to control the RC car from the computer. You can check mine out at http://ozirock.webs.com/ I’d be very grateful of your opinion. Mine wasn’t as complicated as yours just a simple interface with the computer.
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matteo
hi can you say me what rc model did you use and how you make the rc link to the arduino??
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Tony
I showed this to my son. He was impressed. Now he wants an iphone. Thanks.
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prom dresses
This rich content of this thank you for sharing with us
Synchronize multiple collections of Traktor PRO automatically
prusajr
Traktor PRO
It might look useless to use Traktor on two or more PCs, eh MACs , but only at first look. In certain conditions it’s very helpful or even necessary. For example, me and my brother. We often have common gigs, and both of us has his own MacBook. It was pretty annoying to sync our music every time you modified even one little tag or beatgrid. I hated it We kept most of the time actual collection only on one MacBook, totally impractical if you want to prepare your playlist for next gig …
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Andrós
Thanks, this is a great idea. I’m going to check if this works for me too! The only thing is that my DJ library is currently 127 GB and growing (only ‘Mixed in Key’-analysed and 320kbps files). But hey, onces that’s all uploaded I’m sure this could save me a lots of hassle!
iPhone2Midi - controll your software with iPhone finally clever
prusajr
iPhone2midi
Few moths ago my brother and I’ve made iPhone controlled R/C car. It starts my thinking about real usage. First attempt was this video on youtube. I’m very bussy these days but I’ve found some time to make something more complex.
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Martin
This is brilliant, Thank you very much
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redwire1
I tried to use iphone2Midi but never could get a connection to the page. No movement. not sure what ip address goes in OSC Host „To“ block. Wireless or computer id.
johnnyr 8.35 on 29. 7. 2010 Permalink
Nice
I have one of the early prototypes here and it is an great kit.