Dangerous Prototypes Open Source Hardware

Sorry - mistake - busy head - that is cold junction compensation,
 Just ignore the previous message.

You can measure the resistance of the sensor - if is around 0 - thermocouple - when heated generate mV
if it has some resistant when heated check for changes.

Or simply ask the weller support for the type of the sensor.

Quote from: minkok on December 17, 2019, 07:07:16 am

you can read the schematic - sensor is R-TC (KTY82-100, 1k cold) resistive.
And  is not like JBC , it it most likely the same or similar to WSP80.
.
Sorry - mistake - busy head - that is cold junction compensation,
 Just ignore the previous message.

You can measure the resistance - if is around 0 - thermocouple - when heated generate mV
if it has some resistant when heated check for changes.

Now i am confuse😶

There is another option, but for this you need to know exactly what exactly your tweezers, a resistor or a thermocouple is controlled for, if it is identical to jbc, then I would connect it as jbc and would not be afraid to burn because I often carry out such experiments and there were no problems while all the tools work

  I think it’s no harder than jbc micro tweezers, heat a little with a lighter and measure at which contacts the resistance changes there and there will be your thermistor, and then by analogy with jbc a completely identical circuit.  100% not sure, but something like this is being built

wow!
thanks man    

Here's what you must modify to use the controller for Wellert WMRT how tweezers (future support for Weller WMRT will also require this). Cut the power trace around the third button (red lines) and make the connections shown:
[attachment=0]

I will upload the new firmware with added Weller WMRT and PACE TD100 (both black and yellow) profiles soon.

Also, you will be able to upload the firmware with PC software using the bootloader and the USB connection. It will be ready in a week or so.

I will upload and updated GERBERS for a new PCB revision with these modifications. The not needed 7-segment parts will be also removed in the new revision, both from the PCB and the schematic. It will be fully hardware compatible with the current revision.