1. The problem statement, all variables and given/known data 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. 2. Relevant equations τ = RC V = V0e-t/τ 3. 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.