[Eric Archer] constructed an analog computer to model the physics of a bouncing ball. The core is a TL074 opamp that does all the integral math. He had no trouble finding descriptions of analog ...

A few months later, 74-year-old Elmyra Miller, a semi-invalid, was killed in her home on May 2, 1960 — her death was linked to the Bouncing Ball Killer, the AP reported.