In
http://www.engineersgarage.com/electronic-components/uln2003-datasheet
I read: (….. It contains seven open collector Darlington pairs with common emitters.) What does he mean by saying common emitter? Is he mean all emitters of the 7 Darlington pairs are all connected together and with the common ground (pin #8)?
How to use pin #9?
What the difference between driving a 12V relay using this IC or using a simple suitable transistor?
Thank you very much.
http://www.engineersgarage.com/electronic-components/uln2003-datasheet
I read: (….. It contains seven open collector Darlington pairs with common emitters.) What does he mean by saying common emitter? Is he mean all emitters of the 7 Darlington pairs are all connected together and with the common ground (pin #8)?
How to use pin #9?
What the difference between driving a 12V relay using this IC or using a simple suitable transistor?
Thank you very much.