PLEASE HELP, I am using BC638 transistor as a switch for driving 7 leds
connected in parallel, since i'm pulsing the leds so i require a high current around
70-75 mA for each led, for 7 leds it comes to around 500mA and as BC 638
can source that much current but i'm unable to sort out the pinouts for the
transistor as thedatasheet says
1- emitter, 2-collector(middle leg as cpllector) and 3 -base(bottom view)
but my testintg says middle leg is the base
can any one help me in telling the correct pinout for the transistor
OR can any one tell me which other transistor i can use for the same
purpose.
I would be greatful for any help you could give.
thanks
connected in parallel, since i'm pulsing the leds so i require a high current around
70-75 mA for each led, for 7 leds it comes to around 500mA and as BC 638
can source that much current but i'm unable to sort out the pinouts for the
transistor as thedatasheet says
1- emitter, 2-collector(middle leg as cpllector) and 3 -base(bottom view)
but my testintg says middle leg is the base
can any one help me in telling the correct pinout for the transistor
OR can any one tell me which other transistor i can use for the same
purpose.
I would be greatful for any help you could give.
thanks