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You are right I was thinking about ground , Please let me know if I am missing any other connectionGround connection missing for DC Motor!!!!
I am testing manually on breadboard. the wiring connection is same as show in image. I have 5vdc and 12v dc
Now the problem is that both relay and motor are running continuously. I saw both motor and relay does not turn off when 5v dc is switch off.
that does not matter if 5v dc supply is switch ON/OFF. motor and relay are continuously running.
what may be reason? why relay does not turn on / off to motor. how to fix problem ?
Where you are using 5V in your circuit. Is it for your microcontroller? The relay & Motor is connected with the 12V DC. Clarify it
yes that's work. but I think you did not understand what I am trying to do
View attachment 122667
port pin high means 5 v
port pin low means 0 v
I did not program MCU to run motor using relay. I want to connect 5v dc supply. so that pin may be High or low