[Noisebridge-discuss] Type K thermocouples and/or wire

[Jonathan Foote]

Wow, that's punk as fsck. Are you going to drill out the tip for the
thermocouple?


On Sun, Nov 21, 2010 at 2:06 AM, Jake <jake at spaz.org> wrote:
> i thought of this already, my plan is to rectify the primary of the
> transformer of a laptop adaptor, which could be over 200v.  a radio shack
> 30w iron could take 50w no problem if its not over temperature.
>
> this is where the thermocouple comes in, although a platinum sensor like
> some wellers would be nice because it acts like a simple thermistor.
>
> i just bought a PID controeler for a type-K thermocouple before i realized
> that my new weller iron uses a platinum thermistor, so... we could put it on
> the toaster if i had a thermocouple.
>
> i also have this old Omega tpye-K heater controller with no docs, i usedit
> with this iron that had a type-K that died.  i dunno.  its hard to find docs
> for these thermocouple controllers sometimes.
>
> right now i am making a power supply for my weller EC3001 i think, out of an
> old ibook adaptor.. ill instructable it or something.
>
> -jake
>
> On Sat, 20 Nov 2010, Jonathan Foote wrote:
>
>> A good temperature-controlled iron has a beefy heating element: this
>> is why it heats things up much better, but it will also quickly burn
>> out if run open-loop. Cheap pencil irons are basically underpowered by
>> design so they won't burn up (this is why pros avoid them). So there
>> is little point trying to retrofit those unless you upgrade the
>> element as well, which means you'll need to add insulation, and good
>> thermal feedback, and heat-rated wiring, and...
>>
>> If you are keen on this how about retrofitting the reflow toaster oven
>> with a PID temp controller
>> http://www.omega.com/ppt/pptsc.asp?ref=CN7500
>> or building a hot plate a la Mightyohm?
>> http://mightyohm.com/blog/2009/01/diy-pid-controlled-soldering-hotplate/
>>
>> Another fun project might be to make a spot welder. Could probably use
>> a microwave transformer in reverse...
>>
>>
>> On Sat, Nov 20, 2010 at 4:32 PM, Jake <jake at spaz.org> wrote:
>>>
>>> does anyone have any type-K thermocouples and/or type-K thermocouple wire
>>> i can have?  I am making temperature controlled soldering irons,
>>> hopefully
>>> we an also retrofit all the irons at noisebridge too eventually.
>>>
>>> also if you have access to a thermocouple welder then we can make
>>> thermocouple junctions from wire.  I have a whole roll of type-T...
>>>
>>> thanks
>>> -jake
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>
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