PIC temperature, when is it too hot


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  1. #1
    Join Date
    Jan 2005
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    Montreal, Quebec, Canada
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    Default Re: PIC temperature, when is it too hot

    Quote Originally Posted by richard View Post
    provided that the current is spread over a number of i/o pins and that no individual pin is overloaded
    I rechecked my work to be sure, this is my busiest 40-pin PIC that I mentioned previously:

    - 16 rotary encoders pins pulled HIGH,
    - 4 momentary switches pulled HIGH,
    - 2 ADC inputs,
    - 2 PWM:
    __- pin for LCD backlight, 3mA (2N2907)
    __- pin for LED strip, 0.0mA (IRFZ44N) - so low it doesn't even register on my ordinary multimeter.
    - USART TX and RX pins pulled HIGH,
    - remaining unused pins are output pulled LOW

    (waiting for new fuses to retest using my TES multimeter)
    My Creality Ender 3 S1 Plus is a giant paperweight that can't even be used as a boat anchor, cause I'd be fined for polluting our waterways with electronic devices.

    Not as dumb as yesterday, but stupider than tomorrow!

  2. #2
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    Default Re: PIC temperature, when is it too hot

    Quote Originally Posted by Demon View Post
    - 16 rotary encoders pins pulled HIGH,
    - 4 momentary switches pulled HIGH,
    - 2 ADC inputs,
    - 2 PWM:
    __- pin for LCD backlight, 3mA (2N2907)
    __- pin for LED strip, 0.0mA (IRFZ44N) - so low it doesn't even register on my ordinary multimeter.
    - USART TX and RX pins pulled HIGH,
    - remaining unused pins are output pulled LOW
    It's hard to see how that ends up sourcing 110mA out of the IO pins... I would have guessed less than half that.

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