It’s difficult to picture a more bare-bones approach to building an ECG. [Raul] utilized an Arduino nano to gather samples as well as push them to a computer for graphing.

An Electrocardiogram measures electrical activity around your heart. The white circles above are the sensors which he chosen up in a box of fifty for 11 Euros (under $15). Stick them on your skin in just the right locations as well as they’ll report back on what your heart is doing.

He utilized a AD8221 to amplify the signals. He mentions that this is an ins-amp, not an op-amp. We didn’t discover a concise recommendation explaining what that is. It may be a great topic for the comments section. The signal from that chip feeds into an LM324 op-amp before being dumped into the Arduino.

Simplicity comes at a price. This measures extremely little electrical impulses as well as has extremely bit in the method of protecting as well as filtering. since of this you may requirement to do a rain dance, state a prayer, shed a candle, as well as stick needles into a doll to get a trustworthy signal on the other end.

Here’s one more version that doesn’t need special sensors.