floating point at pins of microcontroller

shawnmk123

shawnmk123

@shawnmk123-HRHhJN • Oct 26, 2024
i am doing ' lift control using PIC16F877A'. the connections have been made to the pic and a test program to make a LED blink is given. the LED blinks in a weird fashion.

i checked the voltage at the output pin for LED and its a floating value....is there any reason for this?? how do i solve the problem??
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  • shahrul

    shahrul

    @shahrul-Ex12xz • May 11, 2009

    What do you mean floating value?
    If turn 'ON' LED with high logic (5V), turn 'OFF' LED with low logic (0V), do a LED blinking offcourse the output voltage neither 0V nor 5V. The voltage is between 0-5V depends on your blinking duty cycle.
    0
  • reachrkata

    reachrkata

    @reachrkata-FOcqhH • May 13, 2009

    If the blinking rate of the LED is very fast and you are using a normal multimeter to measure the port signal, the value you are reading is the Average of the fast on-off signal from the port. It is better to use an oscilloscope to do measurements.

    -Karthik
    😁
    0
  • Harshad Italiya

    Harshad Italiya

    @harshad-ukH5ww • May 13, 2009

    Can you please post your Circuit diagram so we can study it... there might be problem in software side.. can you post it also
    0