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Messages - Ryan111

19
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
[quote author="sparkybg"]Vout and Heat+ is the same. :)

60mV is a bit high for this opamp (will give you arround 10 on the 10 bit ADC), but is more or less enough to show that opamp is OK.

I don't know what more to say.[/quote]
Thank you.
Probably I have to use ohm law to make my soldering iron.
20
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
Today I was searching on net for FX-951 or 950 I found some close image of main board:









And two link:

http://http://www.hkepc.com/forum/viewthread.php?tid=1956917

http://http://bbs.hifidiy.net/thread-400486-1-1.html

And this intersting station:

http://http://www.aliexpress.com/store/product/OLED-Digital-Soldering-Iron-Station-Temperature-Controller-For-HAKKO-Handle/1709846_32289765975.html

[quote author="sparkybg"]Connect Vout and GND together. Output from the amp should go from full 5V to almost zero. If it does, your amplifier is OK and sekk for the problem elsewhere. If it doesn't then something with the amplifier is not right.

I don't know how to help more. I only had minor and easy to resolve problems when assembling this project. It ran more or less flawlessly when I assembled it for the first time. The firmware was far more challenging then hardware.[/quote]
Which Vout? you mean this in this circuit?:



I have to connect it to +Heat in fact, Am I right? ok, I connected it to GND and I have 60mv in the output of Op-Amp.
21
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
I replaced the tip with a new one but it didn't work. already when I measured the output of heater, I could see an amount between 3-1mv (when I breathing on it) but now nothing! even when I separately connect +-Heat to the DMM. I can turn on the tip though. it's going to be a complicated issue to me.
22
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
Yeah, it's T12. several times ago I turned it on without controller (just by connecting -+Heat to -+24v). I don't know how to recognize it's chinese or not. I have bought five T12 tips and on all of their packets marked Made in Japan.
23
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
[quote author="sparkybg"]Are you measuring these 250mV when the heater/thermocouple is connected to the amplifier? If not, connect the heater/thermocouple and measure it again.[/quote]
No, I'm measuring it when the heater/thermocouple is connected to the amplifier. :(
24
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
Doh!
I have forgotten to connect "-Heat" to common ground. I just connected it and now I have another problem. I have about 250mv on "+Heat" (I measured it by an DMM(Digital MultiMeter)). Why? I have connected a 100nf cap and 100uf cap between "-Heat" and "+Heat" but couldn't help me. all parts of my soldering iron are completed save this part. my Op-Amp is MCP6V07.

the circuit is this:

28
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
[quote author="sparkybg"]And what was the voltage at the input? You must measure several millivolts at the input of the amplifier.

About the idea - it is not an idea, but a better arrangement of the parts. In your schematic the 10n capacitor is not doing anything, and you will have to put a higher voltage capacitor. When you rearrange the schematic as I said, the capacitor is doung a real job, filtering the input voltage, and hever has a higher voltage than 0.7volts on it. :)[/quote]
Ok, when the +input is 25.7, the output is 14.8(and osilating around it) and when the +input is 26.4mv, the output is 14.8(and osilating around it again). the input is changing when I apply the heat(the +input is about 27-28mv when I apply heat) but nothing for the output! :(
29
Project logs / Re: My HAKKO classic and T12/T15 soldering controller
Thanks
Done but result wasn't good(actually your idea didn't work). I just got a small amount between 4mv and 2mv in the output of the Op-Amp (it didn't change due to heating. I mean it showed me the amounts as I didn't apply heat). I did all things you said and applied heat by light to the tip.

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