15 Jan '15, 5pm

From the archive: #DIY #Arduino based ECG system

From the archive: #DIY #Arduino based ECG system

Cornell University students Sean Hubber and Crystal Lu built an Arduino -based electrocardiography (ECG) system that enables them to view a heart’s waveform on a mini TV. The basic idea is straightforward: an Arduino Due converts a heartbeat waveform to an NTSC signal. Here you can see the system in action. The top line (green) has a 1-s time base. The bottom line (yellow) has a 5-s time base. (Source: Hubber & Lu) In their article, “Hands-On Electrocardiography,” Hubber and Lu write: We used the Arduino Due to convert the heartbeat waveform to an NTSC signal that could be used by a mini-TV. The Arduino Due continuously sampled the input provided by the voltage limiter at 240 sps. Similar to MATLAB, the vectorized signal was shifted left to make room at the end for the most recent sample. This provided a continuous real-time display of the incoming signal. Each frame outpu...

Full article: http://circuitcellar.com/cc-blog/diy-arduino-based-ecg-sy...

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hackaday.com 17 Jan '15, 12am

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From the archive: #Arduino based tube stereo preamp project

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circuitcellar.com 11 Jan '15, 5pm

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electronicsweekly.com 15 Jan '15, 10am

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hackaday.com 13 Jan '15, 12am

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