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How to use uln2803 driver to start relay in proteus

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imani9009

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See the circuit. I want to drive uln2803 with 5 volt signal on 1b input, The Vcc is 12 volt. But he 1C ouptut is two low to drive the relay.
 

Some suggestions about your schematic design :
Use ULN2803 output in open colector configuration.
ULN2003.gif


Replace the LED with your relay.
 

Can you upload the schematic file. Because as you suggested in the snap the circuit is not working
 

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