Mouse Pulse Detector Circuit

Noor Roha, Abdullah (2009) Mouse Pulse Detector Circuit. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The project aim was to develop a pulse detector circuit which detects a pulse signal from a mouse. Using an Infrared Sensor HSDL 5400 as a sensing device, the detector circuit is developed based on amplifier concept which is a principle of differential amplifier. This sensor will be attached to a mouse tail and the wavelength of the infrared light intensity will transmitted through the tissue and received by a photodiode. The captured pulse signal is senses and amplified from a mouse and transmits the signal to be displayed on oscilloscope. The important things need to be considered in designing the detector circuit are, the performance of the detector circuit in produces the expected waveform of the pulse signal and noise that will occur. Since the differential amplifier is limited in its performance, a simple transimpedance circuit is used in designing the detector circuit to overcome this problem. The Sallen-Key active filter will be designed and added into detector circuit to filter out noise frequency. This detector circuit was not only detecting the mouse signal but also can detect human signal as well.

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