1. J

    Using Transistor Optocoupler for level shifting

    Hi Im using a NPN Transistor output Optocoupler (Toshiba TLP290) as a level shifter. I have a source squarewave and a constant current chip (20mA) in series to drive the Optocouplers internal LED. The idea is that the constant current chip will allow the optocoupler to be safely and...
  2. babaliaris

    I made my first amplifier!

    We kinda learned about this circuit in the electronics 1 lab, but I don't understand everything, i have some questions and unfortunatly my lab professor is quite a Karen and won't even hear my questions... Anyway, these are my questions: 1) Which elements can I mess with to increase the volume...