Gupta looked at the blinking cursor on his computer screen. He looked at the rain. He looked at the girl’s devastated face.

"I built it for my final project," she said, water dripping from her nose. "But I fried the oscillator. I have the schematic, but it's… complicated."

Gupta felt a chill run down his spine. He looked at the girl's schematic. R4 was a 680-ohm resistor.