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

[Jake]

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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>