hi everyone
I have a circuit for interfacing relay with parallel port
the relay will control another circuit ( bulb )
I'm using ULN 2803 IC , so that whenever pin 1 of this IC got a 1 value from the parallel port .. the relay will be operated
but since I'm using the proteus for the first time .. I didn't know how to use the connector so I replaced it by ( logic state ) , when it's 1 the relay should work << I thought this would work fine !
this is my circuit when I simulate it , nothing happend for the relay
what should I do to make it run correctly ?
View attachment 68402 View attachment 68403
I have a circuit for interfacing relay with parallel port
the relay will control another circuit ( bulb )
I'm using ULN 2803 IC , so that whenever pin 1 of this IC got a 1 value from the parallel port .. the relay will be operated
but since I'm using the proteus for the first time .. I didn't know how to use the connector so I replaced it by ( logic state ) , when it's 1 the relay should work << I thought this would work fine !
this is my circuit when I simulate it , nothing happend for the relay
what should I do to make it run correctly ?
View attachment 68402 View attachment 68403