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In this paper, on the HART (Highway Addressable Remote Transducer) protocol and the system project gives a brief introduction, and then expatiates the hardware and software design of the intelligent transmitter based on HART protocol. Proposed a set of practical intelligent transmitter solution. The ultra-low-power consumption microcontroller is adopted as the control core of the system. The power...
The Grounding system is very important for the normal operation of the power system and the safety of the equipment and human. The Grounding resistance is the main parameter of the Grounding system, and the measurement of which is the important reference for judging whether the Grounding system is efficient. The paper firstly introduces the concept of the grounding system and its alien frequencies...
This paper describes the wireless communication module NRF905 in the bank application of queuing systems. Describes the system's overall design, a brief introduction NRF905 module hardware features and software programming. Focuses on the realization of wireless communication methods and the development of communication protocols. Also introduced the system hardware design and workflow of each module...
The traditional adjustable linear voltage regulator and switching regulator are both through adjusting the resistance value to change the output voltage. This method has the defaults of low accuracy and not convenience. Using the digital controlled potentiometer but the adjustable resistor, a programmable voltage regulator controlled by computer can be composed. The paper provided three design projects...
The digitally controlled potentiometer is a kind of new style electronic device, which have good development foreground. It can replace the mechanical potentiometer in many fields. The MCU can program the digitally controlled potentiometer through interface circuit to compose programmable analogy device. The paper provides the principle of the test circuit of the digitally controlled potentiometer,...
Sensor or transducers is a kind of important tool for completion of signal collection, and is a device which can feel the physical world of light, pressure, temperature, flow, level, acceleration, force, etc. Then convert this signal into usefulness output signal according to a certain law. The output of some sensors, such as piezoresistive sensor, strain sensor bridge sensor, thermocouple sensor,...
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