#### micro_man

##### Newbie level 6

hi

its a basic question, but i want to know if i am doing write calculations or not

i want to drive a relay using bc547 transistor, relay has a coil resistance of 320 ohms, driving voltage is 12v. so the current required is 37.5mA.

after calculating all the others parameters i get the value of Rb=6.323kohms. Is it write? and is the transistor is in saturation region?

Also tell me how to read the graphs of the transistors and how to get help form these graphs?

thanks

its a basic question, but i want to know if i am doing write calculations or not

i want to drive a relay using bc547 transistor, relay has a coil resistance of 320 ohms, driving voltage is 12v. so the current required is 37.5mA.

after calculating all the others parameters i get the value of Rb=6.323kohms. Is it write? and is the transistor is in saturation region?

Also tell me how to read the graphs of the transistors and how to get help form these graphs?

thanks

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