  This technical paper provides a tutorial to build a low-cost (10-100 USD) and
easy to assemble ECG device (ArdMob-ECG) that can be easily used for a variety
of different scientific studies. The advantage of this device is that it
automatically stores the data and has a built-in detection algorithm for
heartbeats. Compared to a clinical ECG, this device entails a serial interface
that can send triggers via USB directly to a computer and software (e.g. Unity,
Matlab) with minimal delay due to its architecture. Its software and hardware
is open-source and publicly available. The performance of the device regarding
sensitivity and specificity is comparable to a professional clinical ECG and is
assessed in this paper. Due to the open-source software, a variety of different
research questions and individual alterations can be adapted using this ECG.
The code as well as the circuit is publicly available and accessible for
everyone to promote a better health system in remote areas, Open Science, and
to boost scientific progress and the development of new paradigms that
ultimately foster innovation.
