alanjackson13
New Member
I am driving a ULN2003A from two pic outputs. Two 0 -5V 30khz square waves.
I have fed the output from the first driver into the input of the second ie
input pin1 output pin16 is fed into input pin2. And input pin 3 output pin 14 fed to input pin4
The outputs are pulled up to 5v using 10k resistors.
The problem that I have is the putpus drive from 5v to 0.7V. THe output doesn't go down to 0v and I don't understand why?
I have fed the output from the first driver into the input of the second ie
input pin1 output pin16 is fed into input pin2. And input pin 3 output pin 14 fed to input pin4
The outputs are pulled up to 5v using 10k resistors.
The problem that I have is the putpus drive from 5v to 0.7V. THe output doesn't go down to 0v and I don't understand why?