i using BC547 for drive my led matrix..
i have same question about how to calculate current flow through LED. my circuit in atachment.
here my though current flow LED.
I(LED)= (Vcc-VCEsat(BC547)-VCEsat(ULN2803)-Vled) / R2.
but my friends tell it's wrong..
please help how to calculate current LED.
i have same question about how to calculate current flow through LED. my circuit in atachment.
here my though current flow LED.
I(LED)= (Vcc-VCEsat(BC547)-VCEsat(ULN2803)-Vled) / R2.
but my friends tell it's wrong..
please help how to calculate current LED.