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Single housing digital UV sensor

13.02.2014

Silicon Labs announced the release of the industry's first single package UV sensor. This sensor can monitor sunlight exposure, heart rate and blood oxygen saturation (pulse oximetry), as well as implement proximity response and gesture control functions in mobile and wearable electronic devices.

Sensors Si1132 and Si114x, according to the manufacturer, will find application in physical activity monitors in the form of bracelets and cuffs, smart watches and smartphones. In addition to measuring the UV index, they allow you to evaluate the level of ambient light in the visible range and measure infrared radiation.

The ability to measure the intensity of ultraviolet radiation will allow sensor-equipped devices to warn the user of danger by analyzing the total exposure over time and comparing it with acceptable values.

The Si1132 sensor operates in the UV and visible light range. It is equipped with I2C interface.

The Si1145/46/47 sensors additionally cover the infrared range. Among themselves, they differ in the presence of one, two or three LED drivers with 15 brightness levels, which are used in gesture recognition systems.

Currently, such solutions include an external sensor, an ADC, and a microcontroller. Silicon Labs sensors take up 2 x 2 mm space on the board. They are available in 10-pin QFN packages. Price Si1132 - $1,1, Si114x - from $1,32.

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Allen-Bradley CompactLogix 1769 programmable controller 22.10.2020

The Allen-Bradley CompactLogix 1769 Series controller is a compact, feature-rich, low-cost system for distributed control of today's I/O, communication, and control devices.

The 1769-L35E programmable controller in this series has the following features:

RSLogix 5000 software;
built-in communication ports for communication over EtherNet/IP networks and an RS-232 serial port for system or user protocols;
1769-SDN communication interface module for controlling I/O devices and configuring remote devices over a DeviceNet network;
built-in serial port;
compact I/O modules for panel or DIN rail mounting;
1,5 MB built-in memory, which provides support for up to eight tasks;
the number of supported local I/O modules is 30.

Consider the following when designing a CompactLogix system:

The CompactLogix controller is always the leftmost module in the system.
A maximum of three I/O groups and two expansion cables can be used with each controller.
Each I/O group requires a separate power supply.
Only one controller can be used per CompactLogix system.
End caps must be installed around the edges of the communication bus: 1769-ECR on the right and 1769-ECL on the left.
Applications for the 1769-L35E programmable controller include pollution category 2 industrial environments, category II overvoltage installations (according to IEC 60664-1) at altitudes up to 2000 m without derating, etc.

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