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Article: Simple pressure switches comprise transducers, comparators, and op amps. (circuits that condition pressure-transducer signals can change logic-level output when pressure is applied)
- Article from:
- EDN
- Article date:
- April 14, 1994
- Author:
CopyrightCOPYRIGHT 1994 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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With a few added components, circuits that condition pressure-transducer signals can provide a logic-level output that changes state when a pressure crosses a threshold.
In concept, a pressure switch is simple. Its major subsystems are the pressure sensor, the signal conditioning (gain) stage, and output stages that employ comparator ICs and op amps. Just a few added components are necessary to let circuits that condition pressure-transducer signals deliver a logic-level output that changes state when a pressure crosses a threshold or thresholds. Such an output can drive an LED, a microcontroller input, or an electronic switch. The user-programmed threshold, ...