We could also place a perforated plate to reduce the air flow, when the
door is slightly opened.
2014-08-08 11:04 GMT+03:00 Ronen Shouker <***@gmail.com>:
> I believe that with a servo connected by a wire to the door handle, you
> can get very good control. Large movement in the servo, result in small
> opening of the door.
> This way, hopefully, you will not need to combine heating to slow down the
> cooling.
> But even if we need to, this fine-tuning is not that hard to do (just time
> consuming.)
> We could even semi-automate the fine-tuning by running a series of tests,
> testing a variety of options one after the other automatically.
>
>
> 2014-08-08 10:55 GMT+03:00 Zvi Schneider <***@gmail.com>:
>
> The door need to be slightly opened, few degrees only. I don't know yet
>> what is the best way to do it.
>> Maybe we will need to combine door opening with controlling of filament
>> current to achieve the required cooling slop.
>>
>
>
> On Fri, Aug 8, 2014 at 10:26 AM, Ronen Shouker <***@gmail.com> wrote:
>
>> Stepper motor seems to me like an overkill; wouldn't a cheap servo do?
>> Need to be connected via a wire to the door, to prevent heat damage to the
>> plastic parts in it.
>>
>>
>> 2014-08-08 10:18 GMT+03:00 Zvi Schneider <***@gmail.com>:
>>
>> System hangs are real concern.
>>> There is another issue we didn't discussed yet: The cooling phase.
>>> The normal convection cooling of the toaster oven is too slow.
>>> In addition to stopping the filament current we need to slightly open
>>> the oven door at the beginning of the cooling phase.
>>> To start with we can manually open it at the right time.
>>> Later on we can add some mechanical gadget with stepper motor to do the
>>> job.
>>>
>>
>>
>> On Fri, Aug 8, 2014 at 10:04 AM, Ronen Shouker <***@gmail.com>
>> wrote:
>>
>>> I'm going to write the control part in C++, and simulate the whole thing
>>> in software on my machine. Later I will hook up to the hardware libraries;
>>> so I don't care if it arduino , pi, or bbb (well, arduino limits my
>>> resources, but I think I can manage.)
>>> If it's pi or bbb, we could have a web interface directly on it, but
>>> then we need to worry about system hangs, since their os doesn't use a real
>>> time scheduler.
>>>
>>> On bbb we could use one of it's separate microcontrollers, to solve that
>>> issue.
>>> Also, you can also patch the bbb kernel to have real time scheduler.
>>> http://wiki.beyondlogic.org/index.php/BeagleBoneBlack_Building_Kernel
>>>
>>>
>>>
>>> 2014-08-08 9:34 GMT+03:00 Yair Reshef <***@gmail.com>:
>>>
>>> the temp sensor zvi mentioned spits out SPI protocol.
>>>> you dont even need an arduino. you can connect it stright to a
>>>> pi or beagleboard and have a netwroked oven.
>>>>
>>>> i like the idea of storing and managing profiles
>>>>
>>>
>>>
>>> On Fri, Aug 8, 2014 at 3:23 AM, Ronen Shouker <***@gmail.com>
>>> wrote:
>>>
>>>> To clarify the context of "Can't we use the Arduino analog input?"
>>>> Can't we use the Arduino analog input instead of an external ADC for
>>>> the temperature sensor?
>>>>
>>>>
>>>> 2014-08-08 2:57 GMT+03:00 Ronen Shouker <***@gmail.com>:
>>>>
>>>> Can't we use the Arduino analog input?
>>>>>
>>>>>
>>>>> 2014-08-07 22:23 GMT+03:00 Yair Reshef <***@gmail.com>:
>>>>>
>>>>>> I have several 12bit adc converters. i2c
>>>>>> On Aug 7, 2014 10:01 PM, "Zvi Schneider" <***@gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Yair,
>>>>>>> It is a nice project.
>>>>>>> It is more complicated it uses 2 Thermocouple sensors and controls
>>>>>>> two separate filaments. It use more accurate 14 bits Thermocouple-to-Digital
>>>>>>> Converter (in my design I picked the 12 bit one).
>>>>>>>
>>>>>>> Somehow I prefer the simple design using the pc as GUI.
>>>>>>> Lets discuss it.
>>>>>>> We might adopt parts of the design.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Aug 7, 2014 at 8:43 PM, Yair Reshef <***@gmail.com>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> many projects out there
>>>>>>>> https://github.com/0xPIT/reflowOvenController
>>>>>>>> i have such screen availble
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> also, anyone has a skillet ?
>>>>>>>>
>>>>>>>> http://www.instructables.com/id/Simple-Skillet-Surface-mount-Soldering/?ALLSTEPS
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Aug 7, 2014 at 8:37 PM, Ronen Shouker <***@gmail.com>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> actually external clock is only needed for power failue recovery,
>>>>>>>>> and i'm not sure what that would even mean in this context.
>>>>>>>>>
>>>>>>>>> â×ת×ך×× ××× ×××ש×, 7 ××××××¡× 2014, Ronen Shouker <
>>>>>>>>> ***@gmail.com> ×ת×:
>>>>>>>>>
>>>>>>>>> I think arduino should do, maybe just add clock to it, and it
>>>>>>>>>> whould work stand alone. the curve is fixed, right?
>>>>>>>>>> I'm in for on the programming sub-project.
>>>>>>>>>>
>>>>>>>>>> â×ת×ך×× ××× ×××ש×, 7 ××××××¡× 2014, Zvi Schneider <
>>>>>>>>>> ***@gmail.com> ×ת×:
>>>>>>>>>>
>>>>>>>>>>> For the last couple of days I was trying to teach my DVM (which
>>>>>>>>>>> have temperature reading) to speak RS232.
>>>>>>>>>>> I gave up on that.
>>>>>>>>>>>
>>>>>>>>>>> I already ordered K-Type thermocouple sensor and
>>>>>>>>>>> K-Thermocouple-to-Digital Converter.
>>>>>>>>>>>
>>>>>>>>>>> http://www.aliexpress.com/item/-/1944588378.html
>>>>>>>>>>> http://www.aliexpress.com/snapshot/6182323861.html
>>>>>>>>>>>
>>>>>>>>>>> I prepared the schematic see attached file.
>>>>>>>>>>>
>>>>>>>>>>> There is an arduino library that reads the Thermocouple
>>>>>>>>>>>
>>>>>>>>>>> http://playground.arduino.cc/Main/MAX6675Library
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> We need to build either "Python" or "Processing" program to
>>>>>>>>>>> control the reflow process via the arduino. I have little experience on
>>>>>>>>>>> that aria, help is needed.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Sat, Aug 2, 2014 at 4:09 PM, Zvi Schneider <
>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> An interim solution:
>>>>>>>>>>>> We can use DVM which have a K-type temperature sensor and an
>>>>>>>>>>>> RS232 connection. We can use arduino to read the temperature and to control
>>>>>>>>>>>> the SSR.
>>>>>>>>>>>>
>>>>>>>>>>>> In the long run:
>>>>>>>>>>>> We should buy a K-type sensor and a MAX31855KASA+ Thermocouple
>>>>>>>>>>>> To Digital Converter.
>>>>>>>>>>>>
>>>>>>>>>>>> Do we have such DVM in the space?
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> On Sat, Aug 2, 2014 at 2:02 PM, Guy Ovadia <
>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> It's from the same series Zvika considered (a few posts ago),
>>>>>>>>>>>>> the problem with these is that there is no set-temperature input
>>>>>>>>>>>>> electronically, just manually through the buttons. it's designed to keep a
>>>>>>>>>>>>> constant temperature rather than to follow a specific profile.
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Sat, Aug 2, 2014 at 1:50 PM, Yair Reshef <***@gmail.com>
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> *http://www.aliexpress.com/item/-/1693513705.html
>>>>>>>>>>>>>> <http://www.aliexpress.com/item/-/1693513705.html>*
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Sat, Aug 2, 2014 at 1:47 PM, Yair Reshef <***@gmail.com
>>>>>>>>>>>>>> > wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> while cleaning my lab i found the/a PID temp controller
>>>>>>>>>>>>>>> REX-C700FK02-M-AN
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> http://imgur.com/a/HzDVt
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Sat, Aug 2, 2014 at 1:52 AM, Guy Ovadia <
>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> :)
>>>>>>>>>>>>>>>> yes, I think 1Hz would be a reasonable frequency.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Sat, Aug 2, 2014 at 1:26 AM, Ronen Shouker <
>>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Wow, that was long and very informational. After I wrote
>>>>>>>>>>>>>>>>> the message I started to wonder how the dimmers work. Guy, you read my
>>>>>>>>>>>>>>>>> mind.
>>>>>>>>>>>>>>>>> So 1Hz?
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> â×ת×ך×× ××× ×©×ת, 2 ××××××¡× 2014, Guy Ovadia <
>>>>>>>>>>>>>>>>> ***@gmail.com> ×ת×:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> that's a good one. it's not trivial - you have to consider
>>>>>>>>>>>>>>>>>> the AC frequency. Many AC switching devices - Triacs, or solid-state relay
>>>>>>>>>>>>>>>>>> modules which employ a triac inside - only switch off (and in some cases,
>>>>>>>>>>>>>>>>>> on) on zero voltage. if you can only switch off or on at the zero
>>>>>>>>>>>>>>>>>> crossings, then you can only get an integer number of half-cycles (which
>>>>>>>>>>>>>>>>>> are at 50Hz *2 = 100Hz) in a PWM period. if you want a decent resolution
>>>>>>>>>>>>>>>>>> for the PWM (let's say, 100 intermediate steps from full-off to full-off)
>>>>>>>>>>>>>>>>>> then you can only PWM at a frequency of 1 Hz. If the command signal to the
>>>>>>>>>>>>>>>>>> solid-state relay doesn't take this into account and try to PWM at too high
>>>>>>>>>>>>>>>>>> a frequency, the output will not behave as expected since the relay won't
>>>>>>>>>>>>>>>>>> have time to turn on and off.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> one solution is to sync the PWM to the line frequency -
>>>>>>>>>>>>>>>>>> for this you need to measure the line voltage (usually using a transformer)
>>>>>>>>>>>>>>>>>> and detect the zero crossings, and make sure you modulate each cycle the
>>>>>>>>>>>>>>>>>> same way. a common household light dimmer does (a simplified version of)
>>>>>>>>>>>>>>>>>> that idea. it uses a triac, which can turn on on whenever needed, but turns
>>>>>>>>>>>>>>>>>> off at the next zero crossing automatically. at each cycle, the dimmer
>>>>>>>>>>>>>>>>>> charges a small capacitor through the variable resistor connected to the
>>>>>>>>>>>>>>>>>> dial. the rate of charge therefore depends on the setting of the dial. once
>>>>>>>>>>>>>>>>>> the capacitor reaches a preset voltage level, the triac starts conducting,
>>>>>>>>>>>>>>>>>> and continues to conduct until the next zero-crossing. the output,
>>>>>>>>>>>>>>>>>> therefore, sees just part of every AC period: the first xx % of each cycle
>>>>>>>>>>>>>>>>>> it is disconnected from power, and the rest of the cycle it's connected.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> a simpler solution is to PWM at a low rate where the
>>>>>>>>>>>>>>>>>> effect described above doesn't matter much. for heating, it's probably OK
>>>>>>>>>>>>>>>>>> to do that since very fast response is not needed.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> On Sat, Aug 2, 2014 at 12:17 AM, Ronen Shouker <
>>>>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> A basic question: Does PWM need a special care when
>>>>>>>>>>>>>>>>>>> working with AC? If so, should we use DC for the heating element?
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> 2014-08-02 0:15 GMT+03:00 Guy Ovadia <
>>>>>>>>>>>>>>>>>>> ***@gmail.com>:
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> yes, I'd go with PID in software. It looks like the
>>>>>>>>>>>>>>>>>>>> curve should be followed at least approximately. especially the part where
>>>>>>>>>>>>>>>>>>>> the solder reflow actually happens, it should rise to a certain temperature
>>>>>>>>>>>>>>>>>>>> (otherwise no reflow happens) but not much more (otherwise components are
>>>>>>>>>>>>>>>>>>>> damaged), and also should stay at that temp only a specified time (30-60
>>>>>>>>>>>>>>>>>>>> seconds typically) but not 90 or more seconds, where damage is, again,
>>>>>>>>>>>>>>>>>>>> likely to occur.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> switching the thing with a solid-state relay is easy
>>>>>>>>>>>>>>>>>>>> and reliable, much more than a mechanical relay, and can be turned on and
>>>>>>>>>>>>>>>>>>>> off quickly (better PWM). I can provide them, I have some.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> On Sat, Aug 2, 2014 at 12:09 AM, Ronen Shouker <
>>>>>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Also, if you use an arduino, you can easily implement
>>>>>>>>>>>>>>>>>>>> PID in software.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> 2014-08-02 0:06 GMT+03:00 Ronen Shouker <
>>>>>>>>>>>>>>>>>>>> ***@gmail.com>:
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> Do we really need PID? Do temperature curves need to
>>>>>>>>>>>>>>>>>>>>> be that exact?
>>>>>>>>>>>>>>>>>>>>> If we do without, we can use a
>>>>>>>>>>>>>>>>>>>>> normal electromechanical relay.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> 2014-08-01 23:22 GMT+03:00 Guy Ovadia <
>>>>>>>>>>>>>>>>>>>>> ***@gmail.com>:
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> Ronen: I think they implement the output through PWM
>>>>>>>>>>>>>>>>>>>>>> (on/off at differing duty cycles), didn't check though.
>>>>>>>>>>>>>>>>>>>>>> Zvika: it looks like it doesn't have an input for the
>>>>>>>>>>>>>>>>>>>>>> set-point temperature.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> take a look at this - an Arduino shield for reflow
>>>>>>>>>>>>>>>>>>>>>> oven. needs an external solid state relay and a thermocouple, but these can
>>>>>>>>>>>>>>>>>>>>>> be easily arranged (I have SSR's, maybe thermocouples too):
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> http://www.rocketscream.com/blog/product/reflow-oven-controller-shield-arduino-compatible/
>>>>>>>>>>>>>>>>>>>>>> I'm guessing there may be other similar boards.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> On Fri, Aug 1, 2014 at 11:17 PM, Zvi Schneider <
>>>>>>>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> I know that, I'm looking for a way to control
>>>>>>>>>>>>>>>>>>>>>> the reflow temperature curve. May be by using arduino.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> On Fri, Aug 1, 2014 at 11:03 PM, Ronen Shouker <
>>>>>>>>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> PID control requires that you can adjust the heat
>>>>>>>>>>>>>>>>>>>>>>> level. The heat element of a toaster oven normally only goes on or off.
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> â×ת×ך×× ××× ×©×ש×, 1 ××××××¡× 2014, Zvi Schneider <
>>>>>>>>>>>>>>>>>>>>>>> ***@gmail.com> ×ת×:
>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>> Guy: Attached here are the specs for the K-type PID
>>>>>>>>>>>>>>>>>>>>>>>> Temperature Controller.
>>>>>>>>>>>>>>>>>>>>>>>> Do you think we can control it externally or just
>>>>>>>>>>>>>>>>>>>>>>>> manually by using its own lousy buttons?
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>> On Thu, Jul 31, 2014 at 11:11 PM, Moty Marcos
>>>>>>>>>>>>>>>>>>>>>>>> Dorfman <***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>> pick and place with software
>>>>>>>>>>>>>>>>>>>>>>>>> http://www.thingiverse.com/thing:398024
>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>> On Wed, Jul 30, 2014 at 5:30 PM, Ronen Shouker <
>>>>>>>>>>>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>> I brought the toaster oven, it's next to the
>>>>>>>>>>>>>>>>>>>>>>>>>> ATtami box.
>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>> 2014-07-20 10:45 GMT+03:00 Yair Reshef <
>>>>>>>>>>>>>>>>>>>>>>>>>> ***@gmail.com>:
>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>> i need to get this pile to tami
>>>>>>>>>>>>>>>>>>>>>>>>>>> inside there are many things. also that
>>>>>>>>>>>>>>>>>>>>>>>>>>> controller
>>>>>>>>>>>>>>>>>>>>>>>>>>> but won't bring it without good boxes to put
>>>>>>>>>>>>>>>>>>>>>>>>>>> that into.
>>>>>>>>>>>>>>>>>>>>>>>>>>> saving tami from "unsorted" hell
>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>> [image: Inline image 1]
>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>> On Sun, Jul 20, 2014 at 7:43 AM, Zvi Schneider <
>>>>>>>>>>>>>>>>>>>>>>>>>> ***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>> Ronen, We can practice on your oven and replace
>>>>>>>>>>>>>>>>>>>>>>>>>>> it later when we find a better one.
>>>>>>>>>>>>>>>>>>>>>>>>>>> Yair, have yo u found your temperature meter?
>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>> On Sun, Jul 20, 2014 at 12:02 AM, Ronen Shouker
>>>>>>>>>>>>>>>>>>>>>>>>>>> <***@gmail.com> wrote:
>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>> I think I have an old toaster oven, without a
>>>>>>>>>>>>>>>>>>>>>>>>>>>> fan.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>> 2014-07-16 13:03 GMT+03:00 Zvi Schneider <
>>>>>>>>>>>>>>>>>>>>>>>>>>>> ***@gmail.com>:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> I would like to build a reflow oven for the
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> project.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Needed an old toaster oven, preferably with an
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> internal convection fan. Any donations?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Do we have a K type thermometer?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> To-do list:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> mechanical and electrical hacking of the
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> toaster oven.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Arduino temperature control.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LCD display of the reflow pattern.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Prepare soldering reflow patterns.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Who wants to participate?
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ---
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>>>>>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>>>>>> --
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>>>>>>>>>>>>>>>>>>>>>>>>>> 050-6301212
>>>>>>>>>>>>>>>>>>>>>>>>>> tlv, israel
>>>>>>>>>>>>>>>>>>>>>>>>>>
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>>>>>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
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>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
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>>>>>>>>>>>>>>>>>>>>>> https://groups.google.com/d/optout.
>>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
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>>>>>>>>>>>>>>>>>>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-
>>>>>>>>>>>>>>>>>>>>> https://groups.google.com/d/optout.
>>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
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>>>>>>>>>>>>>>>>>>>> https://groups.google.com/d/optout.
>>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
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>>>>>>>>>>>>>>>>>>> https://groups.google.com/d/optout.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
>>>>>>>>>>>>>>>>>>> ק××׊×ת Google.
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>>>>>>>>>>>>>>>>>>> https://groups.google.com/d/optout.
>>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
>>>>>>>>>>>>>>>>>> ק××׊×ת Google.
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>>>>>>>>>>>>>>>>>> https://groups.google.com/d/optout.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ש×
>>>>>>>>>>>>>>>>> ק××׊×ת Google.
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>>>>>>>>>>>>>>>>> .
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת
>>>>>>>>>>>>>>>> Google.
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>>>>>>>>>>>>>>>> .
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>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>> ***@gmail
>>>>>>>>>>>>>>> 050-6301212
>>>>>>>>>>>>>>> tlv, israel
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> --
>>>>>>>>>>>>>> ***@gmail
>>>>>>>>>>>>>> 050-6301212
>>>>>>>>>>>>>> tlv, israel
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> --
>>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת
>>>>>>>>>>>>>> Google.
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>>>>>>>>>>>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> --
>>>>>>>>>>>>> archive and web access >
>>>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>>>> ---
>>>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת
>>>>>>>>>>>>> Google.
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>>>>>>>>>>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> archive and web access >
>>>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>>>> ---
>>>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת
>>>>>>>>>>> Google.
>>>>>>>>>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"×
>>>>>>>>>>> ×× hasadna+***@googlegroups.com.
>>>>>>>>>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
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>>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>> archive and web access >
>>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>>> ---
>>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>>>>>>>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"×
>>>>>>>>> ×× hasadna+***@googlegroups.com.
>>>>>>>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>>>>>>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> ***@gmail
>>>>>>>> 050-6301212
>>>>>>>> tlv, israel
>>>>>>>>
>>>>>>>> --
>>>>>>>> archive and web access >
>>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>>> ---
>>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>>>>>>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>>>>>>>> hasadna+***@googlegroups.com.
>>>>>>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>>>>>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> archive and web access >
>>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>>> ---
>>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>>>>>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>>>>>>> hasadna+***@googlegroups.com.
>>>>>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>>>>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>>>>>
>>>>>> --
>>>>>> archive and web access >
>>>>>> https://groups.google.com/forum/#!forum/hasadna
>>>>>> ---
>>>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>>>>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>>>>>> hasadna+***@googlegroups.com.
>>>>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>>>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>>>>
>>>>>
>>>>> --
>>>> archive and web access >https://groups.google.com/forum/#!forum/hasadna
>>>> ---
>>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>>>> hasadna+***@googlegroups.com.
>>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>>
>>>
>>>
>>>
>>> --
>>> ***@gmail
>>> 050-6301212
>>> tlv, israel
>>>
>>> --
>>> archive and web access >https://groups.google.com/forum/#!forum/hasadna
>>> ---
>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>>> hasadna+***@googlegroups.com.
>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>
>>> --
>>> archive and web access >https://groups.google.com/forum/#!forum/hasadna
>>> ---
>>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>>> hasadna+***@googlegroups.com.
>>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>>
>>
>> --
>> archive and web access >https://groups.google.com/forum/#!forum/hasadna
>> ---
>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>> hasadna+***@googlegroups.com.
>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>
>> --
>> archive and web access >https://groups.google.com/forum/#!forum/hasadna
>> ---
>> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
>> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
>> hasadna+***@googlegroups.com.
>> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
>> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>>
>
> --
> archive and web access >https://groups.google.com/forum/#!forum/hasadna
> ---
> âק×××ת ×ת ×××××¢× ××× ××€× × ×©××ª× ×š×©×× ×ק×××Š× 'TAMI' ×©× ×§××׊×ת Google.
> ××× ×××× ×ת ×ך×ש×× ×ק×××Š× ××× ×××׀ס×ק ×ק×× ××× × ×××"×, ש×× ×××"× ××
> hasadna+***@googlegroups.com.
> ××× ××€×š×¡× ×ק×××Š× ×××, ש×× ×××"× ×× ***@googlegroups.com.
> ××׀שך×××ת × ×ס׀×ת, ×קך ×-https://groups.google.com/d/optout.
>
--
archive and web access >https://groups.google.com/forum/#!forum/hasadna
---
âק×××ת ××××¢× ×× ×××××× ×©××ª× ×× ×× ×ק×××Š× 'TAMI' ×ק××׊×ת Google.
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××׀שך×××ת × ×ס׀×ת ×קך ×-https://groups.google.com/d/optout.