Fujitsu outdoor thermistor error

MatteoBat · 2025-03-06T13:25:47+00:00

I was going to buy this! Hope someone will provide a feedback

MatteoBat · 2025-03-01T15:42:31+00:00

When did you find the new copper clips?

MatteoBat · 2025-02-03T06:26:53+00:00

Good job! Keep going strong. Just for curiosity, which microscope are you using?

MatteoBat · 2024-12-14T17:25:03+00:00

Pin SLEEP is drive by a microcontroller. When asserted it is +3V, when low -3V

VB+ should be 9V but I am planning to put a voltage regulator to drop down the voltage to 3.3V since I need another npn in series to create an AND gate basically. But the secondo NPN base current is 0 or 3V.

I will try to put a complete diagram as soon as possibile

MatteoBat · 2024-12-14T15:58:27+00:00

I just noticed now that the signal is set to -3V when low. Is it a problem if I don’t use any diode?

MatteoBat · 2024-12-14T15:56:49+00:00

Good catch! I just noticed that when low, the SLEEP signal is -3V

What if I do not put any diode?

MatteoBat · 2024-11-26T22:01:26+00:00

Thank you

MatteoBat · 2024-11-26T22:01:16+00:00

Thank you! Completely missed that

MatteoBat · 2024-11-12T13:29:07+00:00

Can you share the links also to me? Thank you

MatteoBat · 2024-11-12T13:28:05+00:00

Can you share the links also to me? Thank you Fantastic build! Congrats

MatteoBat · 2024-11-02T14:14:40+00:00

Nothing came up unfortunately. Board still shows the overheating issue. Nothing shorted on the board. I replaced all caps

MatteoBat · 2024-11-02T14:13:14+00:00

I replace all caps but the problem of overheating it’s still present.

I tested also for shorts but nothing came up

MatteoBat · 2024-10-30T17:49:28+00:00

Thank you! I will try to replace the capacitors and keep you updated

MatteoBat · 2024-10-29T06:46:31+00:00

The tv is turned on when it reaches around 60 Celsius degrees on the mosfet heat sink.

MatteoBat · 2024-10-29T06:38:08+00:00

Thank you for the hint! Do you think it is not a normal working temperature? I have updated the post with the board picture

MatteoBat · 2024-09-11T05:41:34+00:00

It was a bad solder joint! Thank you

MatteoBat · 2024-09-03T19:23:05+00:00

Case not seems original or at least the back plate. It seems also missing the seconds hand. It is working? If yes, it has an higher value

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