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Encyclopedia of Electronic Components, Volume 3 by Charles Platt, Fredrik Jansson

By Charles Platt, Fredrik Jansson

Need to know easy methods to use an digital part? This 3rd booklet of a
three-volume set comprises key info on digital sensors for your
projects—complete with pictures, schematics, and diagrams. You’ll learn
what every one does, the way it works, why it’s invaluable, and what editions exist. No
matter how a lot you recognize approximately electronics, you’ll locate interesting details
you’ve by no means encounter sooner than.

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Extra resources for Encyclopedia of Electronic Components, Volume 3

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It does not measure linear motion or a static angle of orientation. An accelerometer measures variations in linear motion and will also measure its own static orientation relative to the force of gravity. If an accelerometer rotates around its own axis, it will not measure angular velocity. com How It Works vide necessary data to maneuver aircraft, spacecraft, and watercraft, especially when GPS signals are unavailable. Applications Magnetometers are found in handheld equipment such as digital compasses, cameras, and cellular phones.

Many similar detectors are available. 14 spatial > presence > object presence Figure 3-5 A low-cost transmissive sensor, more commonly known as an optical switch. The background grid is in millimeters. The slot in the sensor is about 5mm wide. For longer-distance detection, an infrared receiver can be mounted separately from an infrared LED. The TSSP77038 from Vishay detects infrared light from as far away as 50cm, and pulls its open collector output low in response. The light must be modulated at 38kHz.

Center: the voltage output from a hypothetical photodiode. Bottom: the voltage output from a hypothetical pyroelectric detector. A pyroelectric detector in a PIR module is mounted in a sealed metallic container, as shown in Figure 4-3. The rectangular window in the detector is usually made of silicon, which is opaque to visible wavelengths but transparent to long-wave infrared radiation. Elements The pyroelectric detector used in a PIR contains at least two elements with opposite polarities, connected in series.

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