Hs1101 hs1101 sensor temperature sensor interface with basic stamp humidity sensor using microcontroller relative humidity sensor circuit diagram. Using the hs1101 humidity sensor with an arduino example. Pdf a lowcost microcontroller interface for lowvalue. The hs1101 humidity sensor is a costeffective solution for measuring relative. The rf modules working with a certain frequency range transfer and receive the data with analog form, but for a microcontroller working with the binary data 0 or 1s, the rf transmitter is. This section will help to enable those with limited electronics experience to successfully complete these interfacing tasks. Direct interface with a microcontroller is made possible with the modules linear frequency output. Using the hs1101 humidity sensor with an arduino example mikro. The sensors design is based on a unique capacitive cell. To distinguish hs1101 from hs1101lf, hs1101lf is designed with a black plastic cap. Interface products design guide using can, lin and.
Hs1101 humidity sensorpicaxe interface all about circuits. The hs1101 humidity sensor is a costeffective solution for measuring relative humidity within 5% accuracy. I posted this on the picaxe forum and didnt get an answer from anyone who had tried it, but maybe there is someone here who has. Hs1101 capacitive humidity sensor is interfaced with pic16f877a microcontroller to measure humidity and lcd is used to display percentage humidity in the air. Since costs are important, it is only logical to select the cheapest device that matches the applications needs. This article will make it easier to anybody with very limited experience in electronics to learn how to interface commonly used devices like an led, a switch, a transistor, a relay, a display, a keypad, a buzzer and so on to a pic microcontroller. Arduino and hs1011 humidity sensor example get micros.
Direct interface circuit for capacitive humidity sensors. In most cases it is a factor of 10 in terms of current or voltage. Microcontroller basics a microcontroller is a small, lowcost computeronachip which usually includes. Viii preface whats in this book the book is structured into three sections. Learn to interface and program hardware devices in a wide range of useful applications, using arm7 microcontrollers and the c programming language. Pdf interfacing differential capacitive sensors to. For humans, there is a certain limit for water vapors presence in the air. As the pic microcontroller operates at 5v a potential divider formed from resistors must be used to reduce the pic microcontroller output signal to 1. Cpu stands for centre processing unit which is the brain of the overall microcontroller system. Interfacing to the pic microcontroller this section explains how to interface many different input and output devices to the pic microcontroller. Information obtained from the humirel hs1101 manufacturer datasheet rev 7. Interfacing circuits with microcontrollers, in this article i have discussed various elements and circuits interfacing with microcontrollers. Sensors and microcontroller mohamed albanna all system has an input device, control unit and output device as shown in figure 1.
To see the full series, which includes such titles as robotics with the boebot. The art of directly interfacing sensors to microcontrollers. The art of directly interfacing sensors to microcontrollers mdpi. Main features g g g g g g size and connector type match existing. Interfacing microcontroller to the industrial world. This interface allows a user to get images from the camera, to change some of the properties of the camera as brightness, luminance, etc.
Microprocessormicrocontroller the first microprocessor to make it into a home computer was the intel 8080, a complete 8bit computer on one chip. Digital humidity sensor with lcd display using microcontroller. Introduction to microcontroller world infineon technologies. Pin 7 is used as a short circuit pin for resistor r4. Hs1101 humirel humidity sensor arduino forum index. I have built and experimented with the 555 method of. The 8255 programmable peripheral interface 98 chapter 7 switches and keypads 109 simple switches 109. Pdf direct interface circuit for capacitive humidity sensors. To interface a device to a microcontroller simply means to connect a device to a microcontroller.
I will choose one and show you how to interface it with microcontroller. Microcontroller interfacing techniques document revision. The source code written in c is provided in an accompanying zipped file. Interfacing is one of the important concepts in microcontroller 8051 because the microcontroller is a cpu that can perform some operation on a data and gives the output. It is impossible for me to show you how interface all the these optical isolators with microcontrollers. Capacitance based humidity sensor microcontroller eewiki. Interfacing the max1169 adc to a pic microcontroller.
The length of this wire is about 1 meter which provides easy way to connect to the microcontroller board. Generally speaking, microcontrollers that have both a uart interface for rs232 and spi interface for ethernet, etc. The circuit is composed of two external resistors and two reference. In this circuit, the unknown capacitor c m is charged and discharged consecutively by changing the settings of two. Rc circuit wiring it is easy to interface with any parallax microcontroller, including the. Project ideas, support, and related topics for all of the parallax basic stamp models. This paper proposes direct microcontroller interface circuit on arduino platform, which is realized using the inductive sensors. Basic code examples are provided for users of the basic. How to interface a digital scale strain gauge weight sensor with a microcontroller. Pdf this paper proposes and analyses a direct interface circuit for capacitive. In order to get a better reproducibility during measurements, always connect the case of the header. This paper proposes and analyses a direct interface circuit for capacitive humidity sensors.
Due to my ladder logic compiler, i often get questions on how to build hardware to connect a micro to the outside world. Interfacing methods of microcontroller linkedin slideshare. Chapters 18 aim to create a detailed overview of microcontrollers, by presenting their subsystems startingfromageneral functional. The other block we will use is the adc10, a 10bit analogtodigital converter that serves as a bridge between the usually analog real world and the.
Rc circuit with hs1101 sesnor connected to digital pin d4. Sensors and microcontroller interfacing linkedin slideshare. A microcontroller is a computeronachip, or, if you prefer, a singlechip computer. Such a circuit relies on directly connecting the sensor to a microcontroller without using either a signal conditioner or. In addition some image process is implemented allowing the. The hs1101 is a capacitive type sensor that can operate from 0% to 100% relative humidity. The cpu will execute instruction sets software from the memory flashram and. Digital humidity sensor with lcd display is used to measure the relative percentage of water vapors in air. Peripherals interfacing to the microcontroller 8051 in.
Bas illustrates an interface with two modules based on the humirel hs1101 capacitive sensor configured with a 555 so as to generate a pulse train. Connecting the computation capabilities of a microcontroller to external signals or to external world. Relative humidity measurement using the humirel hs1101 sensor. The above circuit diagram shows interfacing of atmega32 to dht11 sensor. Lecture 3 architecture of arduino development board. How to interface a digital scale strain gauge weight. As a result, microcontrollers are generally tailored for speci. It includes an example circuit and software for a pic18f442.
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