7k in region of it… After that can i find 500ma to 3 amp aur abovehi swag, how do you get 0. 6 in  matlab  above rc formulation?if I have KN2222A transistor to exchange bc547 is  matlab  same formula utilized?Hi Candra, matlab  is  matlab  full conduction switching level  engineering   matlab  BC547 transistor or most small sign transistor. For 2N2222 also  matlab  formula might be  matlab  same…Sorry, my outdated post should have read “it’d seem  matlab   matlab Rc resistor connected among  matlab  base and emitter”. A query on  matlab  connections  engineering   matlab  BC547 transistor in  matlab  first circuit diagram. If  matlab  picture  engineering   matlab  BC547 is transferred directly from its respective datasheet, matlab  may seem that  matlab  resistor Rc is attached between  matlab  base and collector. Is this correct?Thanks.