ULN2003 TO GET OUPUT 9V from5v

I have taken 5v from arduino and interface to input 1 of uln2003 and 9v to com 9 pin ,not getting output at 9v at 16 pin output of 1 input

That’s normal, there are diodes inside the uln2003 preventing current from flowing from pin 16 to pin 1.
What are you trying to do?

ULN2003/2803 cannot provide an output voltage.
ULN2003 outputs are only designed to sink current from a device powered from a higher voltage down to Ground.
Example:
9V to LED anode, LED cathode to resistor, other side of resistor to ULN2003 output. ULN2003 Gnd goes to Gnd.

COM would be useful if the coil of a relay was connected in place of the LED. The internal diode from output pin to COM protects the output transistor when the coil current is shut off (similar to placing a Diode across a motor).

See page 2.

uln2803a.pdf (378 KB)