My HAKKO classic and T12/T15 soldering controller

[lsheng]

T12 temperature coefficient is 23.3uV/C.
Reference is here.
patents/US6087631?dq=soldering+station+temperature+control&hl=zh-CN&sa=X&ei=231IVPaMOafriQL9_4C4Ag&ved=0CD0Q6AEwBDgU

[sparkybg]

Thanks.

So the TC it is Nickel-Kanthal D, maybe. :)

...but, according to the table in the document, it is more like 21uV/C. I am using something like 20uV/C in the latest version of my controller.

[drug123]

Short help request.
Does anyone has Chinese T12 tip clone on hands right now? Could you please measure and let me know resistance between tip terminals, small ones at the end and larger one (tip outer shell). There should be three measurements.
It would be much appreciated! Thank you and sorry for off-topic message, have no idea where question will be more appropriate.

[Ryan111]

It is 1,2,5,6 on T210 and 1,2,5 on T245.
Connector 6 is for identification. There is direct connection with connector 5 on T210 and resistor on microtweezers there:

What's the point about that resistor?
I think my soldering hand piece doesn't have any resistor:



I think that yellow component is a capacitor. am I right?

[sparkybg]

What's the point about that resistor?
I think my soldering hand piece doesn't have any resistor:

Identification. But I am not using it on this project.

I think that yellow component is a capacitor. am I right?

Yes, you are right. I think It will do no harm, so leave it there.

[starman52]

Going back in time ...

Looking at Diogo's project (page 13) - started actually :-)

Is it raw AC, raw DC or smoothed DC feed?

73
Nick
M0HGU

[xdadu]

Can someone please tell me what is the output level/degree for the C245 TC ?

[xdadu]

I found is something around 20uV, I will measure exactly later .
I am trying to do my own driver for C245. For first tests I use old LM358 with reading every zero cross. Is a little unstable on one reading, but with average of last 5 or 10 readings is ok. I buy a MCP6V02 to do best but, strange, is dont work at all, much bad than 358. Readings is very unstable, it looks like auto zero function disturb my read, I gues.
On a linear clasic amplification test on breadboard, looks good, A.O. is functioning. Schematic around A.O. is like sparkybg project. Wha I do wrong? I allready order a MCP6022, but I am still thinking at 6V02.

[sparkybg]

Something in your design is wrong. MCP6V02 has nothing to do with your measurements. There are several things around zero cross that you should have in mind when you are measuring there. There's much noise there, and the noise is different when the power was ON and OFF in the previous cycle. Look at the movies I've uploaded to Youtuve - the voltage you read directly from the TC is not clean at all it needs some processing and filtering. I am filtering with IIR filter, and I am removing the difference when power was on and off. In the last (the more complex version from the other thread) version, I am using wave shaping to remove the peaks, and I put a valley of around 5V on the rectified voltage around zero crossing, because rectified voltage changes pretty quick around zero cross (the voltage gradient is larger there, and fast changing between + and -) and penetrates through MOSFET-s drain-source capacitance into the measurements.

In short - measuring milli-microvolts around zero cross of 24V rectified AC is not an easy task at all. I've spent many hours refining it, and had to make 5 versions of the controller to be able to say that my measurements are correct enough.

[stazis]

Hello,
I want to buy a PCB if it is available for this project.
Please contact me.
Thank you!

[randomone]

I built one of these projects a little while ago but never used it before V5 came out. I now have a use for it and want to check I have the connections correct. Does the attached image look right ?

Also both the Thermocouple connector (J7) and the Iron Vout connector (J2) have a GND pin, do I only use the Iron connector (J2) GND pin ?

[sparkybg]

I think they are correct. Just pay attention when you plug the tip for the first time and be ready to switch it off.

[randomone]

Confirmed, JBC, and Hakko both work as per the diagram.