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A Flexible Oven Controller controlled via touch screen or through USB. Draw and download your own profiles using free Profile Creator.
A Flexible Oven Controller controlled via touch screen or through USB. Draw and download your own profiles using free Profile Creator.
A Flexible Oven Controller controlled via touch screen or through USB. Draw and download your own profiles using free Profile Creator.
344 backers pledged $31,980 to help bring this project to life.

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    1. Claire Bowers on May 9, 2015

      I've been using my Zallus for a while now and it's been great! Thanks for making this great product! Also are you planning to keep the pc software closed sourced? It would be really cool to have it open source! Also having at least another temp probe connection/IR would be really handy.

    2. Kean
      on April 8, 2015

      I got mine in Australia today. Thanks for resending it Nathan.

    3. Nathan Zimmerman Creator on April 4, 2015

      To my knowledge, all members have received there controllers. You can purchase them now here:

    4. Pete Birkett on February 12, 2015

      @Dimitar Penev i would put them at the boom (heat rises) and consider a fan at low rpm always on. this gives good equal temps inside the oven.

    5. Missing avatar

      Dimitar Penev on February 11, 2015

      Hi All, my oven has 600W top and 600W bottom convection resistive heaters which seem sto be to slow for the standard soldering profiles.
      Some pictures attached here
      So I've purchased additional 2000W heater and I wonder if I have to put it at the bottom or at the top of my oven. Any comments?

    6. Iain Kilmurray on February 7, 2015

      The worst part of customs in the uk is they slap a £8 ($12) handling charge

    7. Iain Kilmurray on February 7, 2015

      Wow! I also collected from my local post office sorting office today, thank you for running such a great kickstart! I have powered up its looks great! Time now for me to integrate into my home brewery

    8. Pete Birkett on February 7, 2015

      £16.30 Customs charge here today also. I had to also do 20min drive to my local sorting office to collect and pay. I did mention in a previous comment before you starting shipping about avoiding the customs fee by putting a tick in the (Gift box) on the custom form.You replied to the comment. part from this the controller works but i have yet to install and play with it. very nice controller !!! looks really nice

    9. Iain Kilmurray on February 6, 2015

      Dam customs! £15 charge due

    10. Nathan Zimmerman Creator on February 5, 2015

      Hey James, glad the oven is working for you. If you could by chance post your pictures here:… , that would be greatly greatly appreciated!

      Dimitar: Ofta, that is quite the post. Please re-post this on the forum here: . Its really hard to keep track of things in the comments page.
      1&2: The hardware supports this but I haven't implemented that feature yet in the GUI. For now design your profiles in the GUI, save as csv, and use the reload feature csv feature if you need to recall the target profiles.
      3: Agreed, will fix in next gui release in regards to settings auto downloading.

      In regards to tracking issues, that doesn't sound right. The default values 1P & 20F have tracked well with other users ovens unless underpowered oven / relay wasn't getting enough voltage. Having the elements perform opposite of the profile shouldn't be happening. Again, mind posting a forum post with oven info/link, profile pics, settings...ect? I've sometimes made this mistake when i'm running a profile opposite of the profile slot I saved it in.

    11. Missing avatar

      Dimitar Penev on February 5, 2015

      Hi Nathan,

      I got my controller a week ago and few days ago received my oven. Today I spent 2 hours to install it.

      First of all I have to say that the hardware is very well done!
      The user interface looks nice as well but I have few questions/remarks.

      1. On the Win 8.1 PC I couldn't see the profile target. I can connect to the controller successfully. If I start the process from the PC I see the measured temperature curve. My advice, if PC connected to the controler and if profile started all what we see on the controler should be seen on the PC as well.
      2. PC setting window doesn't initialized with the data from the controller.
      3. If parameter out of range please don't load the default value. It is not what user wants in most of those cases. Give user the possibility to adjust its value. Specify the acceptable range for the P and G gains.

      I have purchased an oven with standard resistive Kanthal heating elements 600W on top and 600W on the bottom.
      After I have measured its step response (using Zallus controller to measure only)
      I got a ramp with speed little bit bigger than the second slope in the 'leaded profile' and slower
      than the first slope in the 'leaded profile'.

      Never the less I have decided to give the controller a try.
      I put an indication in parallel to the heater and I have noticed big periods of relay being switched off even the oven is significantly
      under heated and also relay being switched on even oven is overheated.

      I understand that the controller is optimized for a different fast heating elements but I expected it will behave better with mine.
      Best results I got with P=100, F=1 but still it is far from what I could achieve by switching on and off the oven power switch manually.

      Nathan, probably I am missing something with the settings?

      So I in order to get the job done I have to purchase another heater element.
      Can someone point me to the heating element model preferably in Europe which is OK.


    12. James Jackson on February 5, 2015

      I got my kit, and purchased my oven (Black & Decker) from Goodwill for $10.00. I took liberties when it came to mounting the controller to the oven though, and used a cabinet hinge that I purchased at Home Depot for about $2.50 (well I got two hinges so the cost for one is half that).

      I am able to adjust the viewing angle of the display using this hinge. (I have photos if anyone is interested in details.)

      Excellent work Nathan. I love my new reflow oven!


    13. Royce Pipkins on January 31, 2015

      We got our kit and installed today. It worked great the first try. A well run project with a good product! We blogged about it:

    14. Darrell on January 29, 2015

      I think Kickstarter needs to have an award for the best run kickstarter project each quarter, this project would be on my list as a contender.

    15. Royce Pipkins on January 28, 2015

      My kit came in the mail yesterday. The correct USB cable was there, no phone cable. A few of us at Milwaukee Makerspace are excited to put it together this weekend. Thanks for putting this out!

    16. Nathan Zimmerman Creator on January 24, 2015

      An RJ11 phone cable? Really? Well, hopefully no one else finds that in their package. I just checked my USB cable stock and didn't see any. I'll ship you out a USB cable. Feel free to message me if you have kit issues.

    17. Missing avatar

      Todor Todorov on January 24, 2015

      Hey, did anyone else find a package with a phone cable inside their kit instead of a USB cable?

    18. Dan A on January 23, 2015

      OK, now that my oven has been delivered and built, I'll post a link to where you can get it on Amazon. Didn't want everyone going on and buying before I could get it ;-)

      This is the oven used in the videos:

    19. Missing avatar

      stephen provost on January 22, 2015

      Hi, Nathan! I received my V2 today!
      Now,what oven should I get. Can some people reply on what ovens they used??????

    20. Missing avatar

      Slawek Wojtysiak on January 22, 2015

      Hi Nathan. I received my V2 today. The controller, SSR, and software are working great. You beat me because I haven't purchased my oven yet. Do you recommend any specific models? Great work and greetings from not too far away in northern Illinois.

    21. Nathan Zimmerman Creator on January 22, 2015

      Hey Todor, thanks for the kind words! I've been super busy lately and didn't have time to send out tracking emails to US based customers. I will for internationals once I ship them. Internationals i'm aiming to have completed on Monday and will come with some limited tracking since those take longer and are more prone to issues.
      A couple important notes to rev 2 users!

      Download the latest GUI though there are some bugs, I will release a new version soon and post an update regarding it. Most features are in working condition but I broke some.
      See instructional videos here:……
      Then please read here before messaging me with issues:…

    22. Missing avatar

      Todor Todorov on January 22, 2015

      And I will have to add, it is exemplary execution of this kickstarter! There you have it, proof that projects can be completed in the promised time frame. I am still waiting on another project (AttoDuino) which was supposed to ship last August..

    23. Missing avatar

      Todor Todorov on January 22, 2015

      Interesting! Didn't even know that v2 was already shipping, but found mine in the mailbox today!

      Thanks @Nathan! I will test it out first thing tonight when I get back from work...

    24. Darrell on January 19, 2015

      Nice work on the V2 board, will be interesting to see if I can make a coffee bean roaster from it.

    25. Missing avatar

      William Dutcher
      on January 14, 2015

      Looks great!

    26. Nathan Zimmerman Creator on January 14, 2015

      Hey Stephen,
      I have all the parts and am in the process of writing firmware for V2 as well as doing hardware verification. I added as many features as cost/time/risk/board space allowed, here is a pic: . Has 4 outputs (3 5Vs and 1 3.3V), a buzzer, and 3.3V serial interface. I'm hoping to get 50%+ of the kits shipped next Monday.

    27. Missing avatar

      stephen provost on January 14, 2015

      Nathan: any status on the Jan delivery?

    28. Nathan Zimmerman Creator on January 6, 2015

      Hey all, by request of some users I have created a forum for the product:
      Feel free to contribute!

    29. Nathan Zimmerman Creator on January 4, 2015

      Hey Hayden, I have PM-ed you regarding this. Since you were in the Nov (not Jan. or Dec. international) batch, yes you should have received it by now. Tracking info says failed to pickup in UK & is being returned. Apologies for the delay and will work towards reshipment.

    30. Hayden Kibble on January 4, 2015

      Not received mine (UK).
      Should I be worried?

    31. Missing avatar

      ned73 on December 29, 2014

      Hi, just received my controller down here in Australia!! Its working very nicely, straight forward install. Thank you Nathan for a great product and a professionally run campaign!

    32. Nathan Zimmerman Creator on December 21, 2014

      GUI Update Rev 0.06:
      See image:
      -Points are movable - deletable.
      -Fan functionality for rev 1 fixed
      -Better protection on input parameters
      -Save/Recall updated to include fan/buzzer
      -More info on gains

    33. Dan A on December 20, 2014

      Just received my controller! Have my oven ready and will modify it tomorrow. @Nathan Zimmerman, thanks for running a great project.

    34. Max & Duane Galactic Enterprises on December 19, 2014

      I just got my oven hacked up and connected to your controller. This is a very nice design, and you've done a great job with the documentation.

    35. Dan A on December 18, 2014

      Nathan, I want to compliment you on how well you have managed this project. It should stand as a shining example of how a Kickstarter campaign should run.

    36. Nathan Zimmerman Creator on December 17, 2014

      Note to all who have been sending me messages to purchase this product post kickstarter, my first priority is fulfilling the kickstarter which should be finished in January. I will then have excess rev 1 & 2 units for sale via some avenue such as tindie, ebay, or amazon. I have not been able to respond to all such messages due to volume. Stay tuned and thanks for your interest!

    37. Nathan Zimmerman Creator on December 17, 2014

      Ardash: That is incredible! Thanks for sharing and happy to hear you got USB CDC host working.
      Hey Sam,
      I have shipped out over half of the Dec. kits and hoping to finish labels tonight and shipout tomorrow. I got delayed by ~1wk but was finally able to obtain the original thermocouples demo-ed(only 350+ thermocouples later...). You should have a tracking # within a day or 2 via kickstarter message though note international shipments with USPS have limited tracking updates based upon country.

    38. Missing avatar

      Sam Saprunoff on December 17, 2014

      Good day Nathan,
      I was curious if you have an approximate ship schedule for those that purchased the December Delivery 3.2" LCD version?
      Thanks in advance!

    39. Missing avatar

      Ardash Barsamian on December 17, 2014

      Hello everyone.

      Today I finally finished my reflow oven with my new 3.2" Zallus controller. I have posted a video in youtube demonstrating the fully automated reflow circle (No need for rev 2... long live arduino!!!). The link is
      I am very happy with the controller and the result. This is my first ever reflow work.

    40. Nathan Zimmerman Creator on December 16, 2014

      Ack, thanks for the correction Peter. Proto advantage use to sell a 63/37 pb paste in that same small 0.5cc form factor. I'd recommend atleast starting out with a Pb paste then switching to lead free once your experienced with paste application.

    41. Missing avatar

      Peter K on December 16, 2014

      Nathan, are you sure with the recommended solder paste? The one you linked to (SLD005CC-NC-PB) is a 42/58 Tin/Bismuth composition usually only used for repair or maybe playing around with some prototypes.
      Reason: it melts at 138°C / 281°F (instead of the usual 215°C / 420°) . If you have some hot chips or resistors on your board (hot voltage regulator, hot transistor etc.) they can easily unsolder themselves and fall off. I would not recommend this solder to do anything else as helping removing parts from a PCB. Maybe you pointed to the wrong solder. Maybe you ment this one… ?
      Example, what a melting point of 138°C mean practically:
      Given a board where some parts get 60°C/140°F warm (e.g. a resistor or voltage regulator).This is not uncommon and not really hot, just warm – the parts can stand that for 10s of years. Now place the board in a housing with no air flow. The temperature in the inside will raise by … lets say at least another 10°C or 20°C because of limited heat transfer of the hot inside air to the outside – but still no problem at all. Now let the summer sun shining onto the housing … quickly the hot chips will unsolder themselves …. (even without any heat developing of the electronics, the heat can reach >100°C/210°F in the sun).
      I would be very restricted and careful with this kind of solder. With ‘regular solder’ and a melting point of >200°C/390°F it would be no problem at all.

    42. Nathan Zimmerman Creator on December 15, 2014

      Hey all, its been awhile so here is an update. Rev2 is completed and in the hands of the manufactures. All controllers have been assembled for the December shipments and will be shipped out this week.

      Note for the December shipment: For a couple months now i've been buying 100s of thermocouples from different suppliers all claiming to source the thermocouple i've requested but I have not been receiving the original thermocouple. These other thermocouples read the same and work at reflow temperatures but their exterior insulation is different and they discolor around 230C. See Image: .
      I tried some 15 USD ones from digikey: and their insulation discolors as well at high temperatures (230C) despite the higher temp rating (510C). According to the manufactures this is "normal". I'll be shipping out 2 per package for the December shipment and hopefully by the January shipment I can find a supplier for the original thermocouple.

      Fabian: For solder paste, I can't claim to know the best paste but I buy my paste from digikey or from protoadvantage:…

    43. Fabian Plaimauer on December 10, 2014

      Which reflow paste is recommended?

    44. Pete Birkett on December 7, 2014

      Just to help you if you attach a customs form on the back of UK orders and put a tick in the (gift) box you will have no problems with customs and will carry on its journey to the backer with no problems :)

      also Germany customs is a massive pain. thought i had good success rate when i filled in the customs form in German. a good online translator is good for that.

    45. Nathan Zimmerman Creator on December 5, 2014

      Hey all,
      I've been getting a lot of messages from January and December backers asking why their controllers have not arrived yet. I am planning to ship out controllers(provided all parts arrive) midway through their perspective months and they will arrive within a week to a couple weeks depending on your location with respect to WI/USA.

      Hey Moritz,
      Many thanks for the information! Seems like Windows new motto is that: "its a virus until you pay us hundreds yearly to say otherwise". =( Been reading up on what it takes to get it signed here: . Doesn't look cheap or easy but i'd love to get it done sometime.

    46. Moritz Hoffmann on December 5, 2014

      I got my controller today, I had to pick it up from my local customs office. Could you please attach an Invoice to the outside of the package for shippings to Germany (the German customs service is very picky ;) ).
      Note: I am using an Win8.1 PC, so the driver did not install out of the box, because it has no signature. I disabled signature checking using this guide:
      The controller works very well! I was very surprised that my oven could keep up with the profile ;) Thank you!

    47. Emile Nijssen & Joel Edelstein on December 4, 2014

      My controller arrived about a week ago, just wanted to say that it came very well packaged and works beautifully! Already using it to reflow a set of prototype boards. Thank you!

    48. Pete Birkett on December 4, 2014

      In the video if i remember right the fan on/off trigger signal will be 3v i can always use a npn transistor as a switch with a 5v output to trigger the ssr.i have actually made the simple circuit onto a pcb board as i use them often in projects.
      the fan is a Die cast aluminium 120mm 240VAC (UK) This is so it can withstand high temperatures as a plastic 120mm 12v could not survive.
      i have a bunch of these ssr so might as well use them up you can get the matching heatsinks too very cheap from china
      Anyway thanks for reply's and cant wait to start building my re-flow oven!

    49. Nathan Zimmerman Creator on December 3, 2014

      Hey all,
      Rev 2 will have 5V IO (apart from the UART @ 3.3V). If your using a relay similar to the relay I provide in the kit, I would recommend driving it with 5V. It does operate at 3.3V but is current limited. In order to keep the SSR(triac) operating properly, use 5V. Also, note that highly inductive loads(such as a high current motor) can sometimes damage triacs. However, i'm guessing most fans wouldn't be an issue.

    50. David Murphy on December 3, 2014

      Pete - the SSR supplied with the rev 1 kit works fine controlling my 240V 900W oven, so it should be fine with a fan.

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