A benchtop test setup of a ventilator prototype being built by IISc scientists and volunteers at IISc’s High-Speed Wind Tunnel Complex.The prototype is created out of components from the Indian automotive and RO filter industry. The white canisters contain air and o2, which are mixed in the blue cylinder. The control circuitry is composed of PCL board and Raspberry Pi. The medical test lung is for experimentation testing only. (Photo courtesy IISc Project Praana Team)