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Viability study for fabrication of an impedance meter for biosensors


The objective is to study the feasibility of building a portable and low cost impedance meter to make the use of biosensors practical in the diagnosis of human diseases. The technology will be developed using an embedded microcontroller to perform impedance measurements from 10 ohms to 100 Mohms, electrical capacitance from 100 pF to 1 microF, with amplitude of the sinusoidal excitation voltage from 5 to 500 mV superimposed on a pre- determined in the range of ± 0.5 V and perform frequency scanning from 0,1 Hz to 100 kHz. These electrical characteristics of the meter are limit values, which can be specified for a particular biosensor. The cost of components of the thousandth Reais will allow its use for biosensors of the interdigitated, electrochemical and microfluidic types in diagnoses of diseases, devices that are not yet available in the market. In addition, the technology to be developed will allow to design other products such as bench impedance meters and signal generators, allowing to reach the needs of a broader market range for the analysis of impedance and signal generation, in general, imported equipment and of high added value. (AU)

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