This week I finished assembling and testing the 555 timer interrupter circuit with audio modulation. The circuit functions properly when tested standalone – duty cycle modulates from 35Hz to 35kHz and the 3.5mm audio jack accepts input signals correctly. However, I’m encountering integration issues when combining it with the oscillator and gate driver circuits, likely due to grounding or timing problems. Next week I’ll systematically debug these interfaces with the oscilloscope and coordinate with Caleb on proper grounding between circuit boards.
Carnegie Mellon ECE Capstone, Spring 2026 – Caleb Doan, Jayson Ma, Jack Wang