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Project logs / Re: Really universal soldering controller
maybe v1.33 really only works with -OsRight, it's a good point, I'll check that tomorrow.
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Messages - afedorov
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Project logs / Re: Really universal soldering controller
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Project logs / Re: Really universal soldering controller
From my understanding, the original -Os optimization level was necessary to fit the firmware into the microctonrollers memory.If I remember correctly, Sparky really accents that -Os is required. Firmware is highly performance optimized using all sorts of tricks, so maybe some compiler features are really required for proper functioning. It may be even compiler version dependent. And even without -Os program size is well below 64k.
I assume he also tested if it works on his unisolderNo, it's not tested in hardware. It's just a successful build to prove environment integrity as the discussion was on installing and configuring MPLAB and its stuff. Compiler version was 2.41.
I've tested free v2.41 build just now and it works OK with T245.
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Project logs / Re: Really universal soldering controller
I've played around a bit with my MPLAB compiler settings and tried enabling optimization (-O2), but that did not change anything either.Just to clarify, did you tried the original Sparky's HEX files or always play with your custom build?
Can't see how CTemp calculation may be affected by hardware. Though, may be by the wave shaping code somehow. But it can be disabled by changing WSLength in the iron profile to 0. Or heater resistance compensation, which should be 0 anyway for T245. The rest is basically calculating mV from ADC value and polynomial temperature calculation. It's not hardware dependent in any way. Also, I don't understand how CTemp can change that rapidly. In the moments when it's not at room temperature, it shows pretty much correct readings.
Here is how it should perform.
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Project logs / Re: Really universal soldering controller
However I can only see 1 variable for max power in iron.cCheck any tweezers profile.
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Project logs / Re: Really universal soldering controller
In my build I characterized chosen transformer using this article, and also measured inrush current and then calculated I2t value for fusing using this video.
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Project logs / Re: Really universal soldering controller
I was looking into adding in a AC slow start circuit such as this oneWhat primary voltage and power rating of your transformer? Using NTC here is tricky since load on the transformer varies a lot.
Soft start circuitry usually not required for such relatively low power appliance.
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Project logs / Re: Really universal soldering controller
Pinout looks to be the sameRight! I looked in HC132 datasheet instead of 4093.
Regular gates really doesn't like intermediate states and slow transitions that may occur with weak pull-up. It may improve the circuit, may not. Since it's dirt cheap why doesn't try it.
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Project logs / Re: Really universal soldering controller
Sounds promising. So something like MC74HC132ADG?Or 4093. The sensor uses gates as inverters, so no difference if it's NOR or NAND. Unfortunately for some weird reason pinout is different.
4106 also may be used and, having 6 gates, dual channel sensor with filtering may be implemented.
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Project logs / Re: Really universal soldering controller
and you seem to imply that the diode is not preferable if not absolutely needed. Why is that?Because voltage induced by hand is AC and is capable of driving input low.
It's all a matter of choosing correct/acceptable pull-up/pull-down strength. And maybe it's worth to try version with schmitt trigger inputs, it handles weak signals better.
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Project logs / Re: Really universal soldering controller
yes, but noisy environment isSure, decoupling would never hurt.
RS274X loads OK , but solder mask problem still persist (on both layers). Since it's affecting only one footprint, the issue is with this particular footprint.
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Project logs / Re: Really universal soldering controller
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Project logs / Re: Really universal soldering controller
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Project logs / Re: Really universal soldering controller
thanks a lot. It should be workable, I could scratch away the mask where needed. Although I probably will wait until an updated version is published. Afterall, I do not think this will improve my current solution with the resistor added to the wire.Scratching the mask on fabricated boards doesn't sound right. )
What does C1 do in this circuit?
C1 is on power rail for energy storage and decoupling, though it's too far from IC's power pin, but this should not be a problem.
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Project logs / Re: Really universal soldering controller
X2?There is good old Gerber format, and newer, not widely adopted (yet?) Gerber X2. Seems like Proteus producing those X2 files, but JLC accepts it, which is good. I've renamed files published by minkok to JLC's recommended naming pattern and service found drill files, but there some issues with solder mask - some connector pads doesn't has mask expansion.