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Problem with output voltage of a PWM generated by PIC

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innovationhut

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i wrote a code to generate the PWM using PIC, I do not have the oscilloscope to measure the time periods.

But when I measure the voltage across it using multimeter, it output 1.2v, Is not it supposed to be 5v?

What am i doing wrong.

I need at least 3.5v, as the MOSFET driver I am using atleast need 3.5 v at input.

Any suggestions?
 

PIC PWM

You mean it always output 1.2v, never change?
I think you should check you hardware, if this work normal.
If your VCC is 5v, then it is supposed to be 5V in high level output.
 

Re: PIC PWM

But when I measure the voltage across it using multimeter, it output 1.2v, Is not it supposed to be 5v?
Click to expand...

No. Your multimeter is displaying the AVERAGE value (I assume PWM frequency is high).

V_multimeter = (5V * T_high + 0V * T_low) / PWM_period

where PWM_period = t_high + t_low

Try changing the duty cycle to see if the value shown by the multimeter changes,

You really should check your circuit with an oscilloscope.
 

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