Classic Rev6 Power off after few minutes

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7 months 1 day ago #10012 by Ya
the tubes are connected. the voltage is good.
just before stopping the tubes will start flashing.

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7 months 1 day ago #10013 by Ian
Please stop it and let it cool down completely, then restart it again and monitor the temperature of the MOSFET. Does it rise rapidly, or does it rise slowly at first and then rapidly?

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7 months 1 day ago #10014 by Ya
I noticed that before stopping, the clock flashes, the mosfet and cold.
The 5V drops to 4V, and there the mosfet (irf740) becomes hot.

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7 months 1 day ago - 7 months 1 day ago #10015 by Phil_Mod3
What is the calibration value for the PWM ON time? This is the result of the calibration routine, i.e. the average of the final values of counting up and down.

Edit: Ian, is there a problem with the forum? I can't load many threads. It seems like the ones with images in it are problematic (I keep getting 504 Gateway time out). Or is it just on my side?
Last edit: 7 months 1 day ago by Phil_Mod3.

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7 months 1 day ago #10016 by Ty_Eeberfest
Phil: Ian mentioned to me that there is a problem with the forum that's affecting everyone.

Ya: Would it be possible for you to measure the current that the clock is drawing from the external power supply before, during and after the problem occurs?

Look into it later when the dust is clearing off the crater.

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7 months 1 day ago #10018 by Ya
Pwm on time after calibration: ~ 200
I tried to adjust this value to see the effects on the problem: it is not related.
In my opinion, the problem probably comes from the low voltage circuit, maybe my induction or the LM2595 (Accustomed to 7805, I discover this new circuit).
I did continuity tests, the card does not seem to have cut circuits.
I would do a test, to measure the current drawn on the power supply.

Quick question: I bought this card to be able to test the detection by PIR. Not using the LEDs on the clock, could I have implemented this function on the Rev4?

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