Team Protocentral, an open source hardware firm from Bangalore, India, is raising crowdfunds to release its HeartyPatch device. The HeartyPatch is a single lead ECG patch that can track the heart rate and heart rate variability (HRV) when stuck to the chest. Similar devices have been developed and commercialised previously, but the HeartyPatch provides open source access to the software running it, allowing anyone to implement it for unique use c...