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+-- Forum: Pinecil (https://forum.pine64.org/forumdisplay.php?fid=162)
+--- Forum: General Discussion on Pinecil (https://forum.pine64.org/forumdisplay.php?fid=163)
+--- Thread: Pinecil Tempaerature Reading jumps to Y400°C when active but stays normal when cold (/showthread.php?tid=18969)
Pinecil Tempaerature Reading jumps to Y400°C when active but stays normal when cold - H3wastooshort - 12-24-2023
What is causing this and how can I fix it?
After an event which caused my Pinecil V2 to stop working with a near-0V 3V3 rail until i desoldered the shorted USB C PD chip, my temperature readings jump to over 400°C. I am suspecting a voltage spike from a dodgy PSU to be the cause of this event, though i am not certian. The jumpy temperature reading only happens when the iron is heating up, not while in standby/off mode.
From what I can tell from the schematic, documentation and sourcecode, the Pinecil switches between heating and using the heater as a dodgy thermocouple. I am suspecting that another component got affected by the event and either gets stuck or take a longer-than-usual time to switch or settle. I have tried swapping the OP-Amp that is responible for reading the tip voltage, but to no avail, so i swapped the original one back in. I am currently going through the sourcecode to try and increase the measuring time and/or the time waited after switching off the heater power and before measureing the temperature.
This seems promising so far: https://github.com/Ralim/IronOS/blob/9931afdb0f3129321271a5b42e2fc46b5eca3a9c/source/Core/BSP/Pinecilv2/IRQ.cpp#L154
Does anyone else have a different idea to what could be the cause of this issue?