Recent content by cynthia0303

  1. C

    Hi everyone, my name is Erika :D

    Hello Erika :) Nice to meet you
  2. C

    Transistor Logic Gate : NOT Gate Explanation?

    Which diode should be omitted? Is it D3 or D4? BTW, Thank you so much for your explanation , you are so helpful! Does the resistor act as a pull-down? My teacher told me once but i don't really understand why.. I never heard of genetic evolution circuit generator programs, it sounds cool but...
  3. C

    What makes electrical engineering so fascinating?

    Hello everyone , my name is Cynthia. Currently, I am an second-year university student majoring in Electrical Engineering. The reason why I choose EE is because i want to learn and discover the 'magic' of EE :) I am still a newbie in this field, so I hope I could gain more knowledge here. Thank...
  4. C

    Transistor Logic Gate : NOT Gate Explanation?

    Thank you so much guys for your answers. I am using this NOT gate circuit which i found on web. I don't really understand about the design considerations though. Maybe this is only for experimenting :)
  5. C

    Transistor Logic Gate : NOT Gate Explanation?

    Hi everyone. I would like to ask about this light sensor using not gate circuit. I use LDR as an input and a LED as an output. I have tried this circuit in Proteus, and it works. When the LDR 'off', LED turns on, and vice versa. But i don't really understand about the working principle of this...