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Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Uma interface lab-made para aquisição de sinais analógicos instrumentais via porta paralela do microcomputador

2004; Brazilian Chemical Society; Volume: 27; Issue: 5 Linguagem: Inglês

10.1590/s0100-40422004000500024

ISSN

1678-7064

Autores

Edvaldo da Nóbrega Gaião, Everaldo S. Medeiros, Wellington da Silva Lyra, Pablo Nogueira Teles Moreira, Edvan Cirino da Silva, Mário César Ugulino de Araújo,

Tópico(s)

Electrowetting and Microfluidic Technologies

Resumo

A MICROCOMPUTER.A lab-made interface for acquisition of instrumental analog signals between 0 and 5 V at a frequency up to 670 kHz at the parallel port of a microcomputer is described.Since it uses few and small components, it was built into the connector of a printer parallel cable.Its performance was evaluated by monitoring the signals of four different instruments and similar analytical curves were obtained with the interface and from readings from the instrument' displays.Because the components are cheap (~U$35,00) and easy to get, the proposed interface is a simple and economical alternative for data acquisition in small laboratories for routine work, research and teaching.

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