Last Updated on July 29, 2026 by pg@petergamma.org We can have such a device from iWorx with the TA 220 for a view thousand dollars: but the device is not open source and a big machine. Modern components are affordable and small Key components to replace it are: the AD 8232 the ADS 1115: And … Continue reading To build a 3 channel ECG gold standard device with spirometer for a view hundert dollars?