2 transistor circuit help

[viri]

#
i would like to know whats wrong with my circuit
because the motor spin very slow
if i connect the dc source (9 V , 0.5 A ) directly to motor it spin 10 time faster
and is the value of resistor right ???
i calculate it according to this Ic = hFE × IB

many thanks
sorry for my english

 

[Jony130]

Remove Q2, connect the motor between Vcc and Q1 collector and Q1 emitter connect to gnd.

 

[alec_t]

When using a transistor as a switch assume it has a gain of only 10. So if your motor draws, say, 400mA max then the base current of Q1 will be assumed as 40mA to ensure the transistor saturates, requiring R1 to be ~ 220Ω.

 

[Roff]

With your circuit, Q2 is running as an inverted transistor (collector and emitter functions are swapped). The current gain will be VERY low, possibly less than 1.
You don't need two transistors. See the attachment.
The diode will protect your transistor from the high flyback voltage across the motor which will occur if you omit the diode.