THE PROPELLER CLOCK
Implementado com 33 LED´s.
MONITOR CARDÍACO - ELETROCARDIOGRAMA
Construa seu Próprio Monitor Cardíaco
Eletrocardiograma (ECG)
The heart's electrical signals set the rhythm of the heartbeat.
An EKG shows:
* How fast your heart is beating.
* Whether the rhythm of your heartbeat is steady or irregular.
* The strength and timing of electrical signals as they pass through each part of your heart.
Este projeto vai ensinar você a criar o seu próprio dispositivo de monitoramento cardíaco, um ECG/EKG (eletrocardiógrafo) simples.
The experimental challenge is that the signal we’re looking for measures only about 1mV, it can change in as little as 1/100 of a second, and it’s embedded in a noisy environment. To keep up with the signal and boost it to a digitizable 1V level, you need an amplifier with a gain of about 1,000 and a frequency response of at least 100Hz.
To examine the ECG signal, you’ll need to digitize and record it on your computer. This requires an ADC or data logger device that can sample at 200Hz. (The Nyquist Theorem states that reading an oscillating signal requires sampling it at a minimum of 2x its frequency.)
The experimental challenge is that the signal we’re looking for measures only about 1mV, it can change in as little as 1/100 of a second, and it’s embedded in a noisy environment. To keep up with the signal and boost it to a digitizable 1V level, you need an amplifier with a gain of about 1,000 and a frequency response of at least 100Hz.
To examine the ECG signal, you’ll need to digitize and record it on your computer. This requires an ADC or data logger device that can sample at 200Hz. (The Nyquist Theorem states that reading an oscillating signal requires sampling it at a minimum of 2x its frequency.)
Construa seu Próprio Monitor Cardíaco, um ECG simples.
O sinal que vem do corpo inicia sendo amplificado (este sinal é muito pequeno e fraco, variando entre 0,5mV e 5,0mV), filtrado (para remover o ruído), amostrado (usando um conversor Analógico/Digital, conhecido como ADC).
O sinal que vem do corpo inicia sendo amplificado (este sinal é muito pequeno e fraco, variando entre 0,5mV e 5,0mV), filtrado (para remover o ruído), amostrado (usando um conversor Analógico/Digital, conhecido como ADC).