Mac7978
Member level 2

Dear all
If uses a single NPN transistor to drive LEDs, can anyone tell me what is the advantage and disadvantage to put those LEDs at collector (graph A) or at emitter terminals (graph B)?
Thanks
Regards
If uses a single NPN transistor to drive LEDs, can anyone tell me what is the advantage and disadvantage to put those LEDs at collector (graph A) or at emitter terminals (graph B)?
Thanks
Regards
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