➀ Scientists in Stuttgart are developing a method to control prosthetics using quantum sensors to detect nerve signals; ➁ The technology uses optically detected magnetic resonance (ODMR) devices with diamond-based sensors; ➂ Spectrum Instrumentation's digitizers and arbitrary waveform generators are used for signal processing; ➃ The goal is to create a compact control box with a day's worth of battery life for prosthetics within three to four years.