278: Bricks' Batteries Last Forever (Repeat)
Matt Liberty, founder of Jet Perch, discusses the design and development of Joulescope, a high-precision current measurement tool launching via Kickstarter. He explains the engineering challenges of measuring dynamic ranges spanning nine orders of magnitude, from nanoamp sleep states to amp-level active currents, and how standard multimeters fail due to burden voltage and resolution limits. The conversation covers software strategies for low-power embedded design, such as managing GPIO states and clock speeds, and details the hardware innovations in Joulescope, including its auto-ranging shunt resistors and electrical isolation.