Recent content by denniegst

Homework Statement Base on this circuit, how would I make the LED stay lit for 2 seconds? My knowledge goes as far as op amp and first-order circuits. I just don't know how to mathematically solve for the right capacitor that will make LED stay lit for 2 seconds because I've never dealt...

Is there any other solution to this problem? I think my professor said there should be 5 unknowns and 5 equations...

I don't know... probably not though. How I wrote the problem was how the teacher assigned it.

Thanks for the welcome, this forum seems like a good tutor... so going from the 2uf capacitor to the other 2uf capacitor you can cancel out the middle capacitor but what about going from the 1uf cap to the 4uf? Thats not in ratio... I guess a little more explanation on that would be great...

Homework Statement Find the Equivalent Capacitance: Homework Equations c=Q/V Conservation of energy The Attempt at a Solution I made Q1 be the capacitor of 1uf, the top 2uf be the capacitor of Q2, bottom capacitor of 2uf be Q'2, capacitor of 4uf be Q4, capacitor of 5uf be Q5...