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remias / CAMXTOOL-V3.5-cnc-board-sch

CAMXTOOL V3.5 cnc board schematic (0.approximation)
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Any idea what the unlabeled part is? #1

Open ArcAIN6 opened 3 years ago

ArcAIN6 commented 3 years ago

Looking over the schematic, it appears there's an unlabled 8 pin part. does there happen to be a part number on the chip? image

remias commented 3 years ago

Hi,There are no letters or signs on the chip.:(best regadsRémiás Gyula------------------------------------------ ArcAIN6 @.***> írta:

Looking over the schematic, it appears there's an unlabled 8 pin part. does there happen to be a part number on the chip?

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bnvill84 commented 2 years ago

Not sure if you got your answer yet, but it sort of seems like that chip regulates the PWM for the laser or the spindle. https://www.mouser.com › F...PDF FAN4803 8-Pin PFC and PWM Controller Combo - Mouser Electronics

It's just a guess, but that's what I think it might be.

ArcAIN6 commented 2 years ago

Not sure if you got your answer yet, but it sort of seems like that chip regulates the PWM for the laser or the spindle. https://www.mouser.com › F...PDF FAN4803 8-Pin PFC and PWM Controller Combo - Mouser Electronics

It's just a guess, but that's what I think it might be.

mmm i don't think so.. the pin mapping doesn't line up, and there's no need for a dedicated PWM IC, as it's created by the micro-controller... I'm wondering if it's not like a dual package mosfet or something... but i'm not sure, i've never seen VCC on pin 2 in an 8pin package before... Wonder if it was mis-measured shrugs