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DESIGN AND DEVELOPMENT OF MEDICAL ELECTRONIC ...

DESIGN AND DEVELOPMENT OF MEDICAL ELECTRONIC ...

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UNIVERSAL SENSOR INTERFACE 223TO J2 <strong>OF</strong> UNIVERSALSENSOR INTERFACE114215R1316456017518619720821R59221k102311241225131IC1MOC30316R2100TR1 RLOAD24C1ZERO0.1uFQ4004CROSSCIRCUITQ22N2222B19V +R31.2k117VACCONNECTOR DB25BATTERY - (POWER <strong>AND</strong> DIGITAL GND)Figure 5.10 The digital-output lines of the universal sensor interface can be used to control ac loads in response to sensor inputs. This linecontrolinterface is suitable for turning on or off relatively light ac-powered loads. (From Prutchi [1999]. Reprinted with permission fromPopular Electronics, June 1999 © Gernsback Publications Inc.)TO J2 <strong>OF</strong> UNIVERSALSENSOR INTERFACE11421531641751861972082192210231124122513B19VIC2MC78L05CP3 1VIN VOUT43R2220IC1PS250612RDROPAC OR DCINPUTCONNECTOR DB25C1.01uFGND2C1.01uFFigure 5.11 Use this circuit to translate and safely isolate external ac or dc levels (e.g., power switch closures) to signals that can be readby the digital input lines of the universal sensor interface. (From Prutchi [1999]. Reprinted with permission from Popular Electronics, June1999 © Gernsback Publications Inc.)

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