- #1
Mosaness
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Homework Statement
The problem is to create a small alarm that will buzz approximately 6 seconds before it stops buzzing. I managed to create a working alarm, only problem is mines will buzz for around 1.5 seconds not six.
Homework Equations
τ = RC
V = V0e-t/τ
The Attempt at a Solution
Req. = 400Ω + (80Ωll100Ω) ≈ 444.44 Ω
VTH = 6V * (400Ω/480Ω) = 5V
Substituting this into equation #2 above gives 5V = 9V*e-6/τ
Solving for T yields:
Actually, I just lost myself in my work. Can someone help me.