Hello friends, I hope you all are doing great. In today's tutorial, we are gonna have a look at detailed Introduction to MPR121. MPR121 is a touch sensor controller, its working is like the capacitor's working principle. This module has twelve electrodes points, it communicates via I2C protocol. When any objects come closer to an electrode point, we can observe the presence of an object by variation in capacitance of an electrode. It's working voltage should be between 2.5 to 3.6 VDC.
MPR121 is used in different industrial projects and electronic devices such as mobile phone and remote control systems. In today's post, we will have a look at its working, pinout, protocol, applications, etc. I will also share some links where I have interfaced it with other microcontrollers. If you have ...
Hello friends, I hope you all are doing great. In our previous lectures, we have studied two types of diodes i.e. Basic PN diode and Schottky Diode. Today, we will discuss the third type of diode i.e. Zener Diode. Zener Diode was invented by the American engineer Clarance Melvin Zener, so it's named after him. The specialty of the Zener diode is that it can operate in both forward-biased and reversed-biased directions. In today's post, we will have a look at its working, features, ratings, construction and applications. So let's get started with what is the Zener Diode.
What is Zener Diode?
The Zener diode is a special diode, that enables the current to flow not only from the positive terminal (anode) to the negative terminal (cathode) but also in the opposite direction.
The dop ...
Hello friends, I hope you all are doing great. In today’s tutorial, we will discuss What is KCL ( Kirchhoff's Current Law ). KCL (Kirchhoff's Current Law) is the fundamental rule of electric circuitries. In 1845 a German physicist Gustav Robert Kirchhoff presented two essentials rules to explain different circuitries. Ist law is KVL (Kirchhoff's Voltage Law) and 2nd is KCL (Kirchhoff's Current Law). These rules further defined the working of Georg Ohm, who gave Ohm’s Law and lead the work of James Maxwell who gave Maxwell equation.
Both of these rules also work for a time (t) and frequency (f) measurements. In certain cases when the frequency of a signal is higher these laws work for the alternating current circuitries. In today’s post, we will ha ...
Hello friends, I hope you all are doing great. In today's tutorial, we will discuss What is Ohm's Law. In 1781 an English scientist and philosopher Henry Cavendish was doing an experiment on the tubes which were prepared by the brittle material like glass to measure their radius (r) and length, tubes were full of salty solutions. During this test, he computes the current which he sensed as he accomplished the circuitry with his body. By this observation, he referred that the current is directly proportional to the voltage. He didn’t share his finding to other people and his findings remained unknown till 1879 then Maxwell shared them with other scientists. To practically see the working of ohm's law, you should try our online Ohm's Law Calculator.
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Hello friends, I hope you all are doing great. In today’s tutorial, we will discuss What is the Current Source. In an electrical system, there are two main sources first one is a voltage source and the other one is the current source. There are further two types of current sources real and ideal current source. The current produced by the ideal current source has the same value irrespective the variation in the circuitry voltage. As the current of the ideal source does not depend on any parameter of circuitry like the voltage, resistance, so it also called independent source.
The current source is the correspondent of the voltage source. In today's post, we will have a look at its working, types, circuits, ideal sources and some other related fact ...
Hello friends, I hope you all are doing great. In today's tutorial, we are gonna have a look at detailed Introduction to PN2222. The PN2222 is a conjoint NPN bipolar junction transistor which is used for common persistence less power intensifying or swapping circuits applications. It is intended for low to intermediate current, squat power, intermediate voltage and can activate at a temperately higher speed. It was initially prepared in the TO-18 metallic cascading.
It is reflected as a very communal transistor and used as a replacement of NPN transistors. It is normally used as a lesser signal transistor and it vestiges a small common persistence transistor of permanent reputation. In today’s post, we will have a look at its cover, specks, associ ...
Hello friends, I hope you all are doing great. In today's tutorial, we are gonna have a look at detailed Introduction to MCP23008. MCP23008 provides an 8-bit parallel input/output expansion for I2C bus and SPI applications. It has 8-bit configuration registers for input, output and polarity changing. The master device can enable input and output pins of MCP23008 by writing the Input/output configuration bits. A polarity of the input port register can be inverted with the polarity of the inversion register and all registers can be read by the system master.
MCP23008 is used in different industrial and class projects where I2C and SPI interfacing is required simultaneously. In today's post, we will have a look at its pinout, features, specifications ...
Hello friends, I hope you all are doing great. In today's tutorial, we are gonna have a look at detailed Introduction to A4988. The A4988 is a micro-striding driver for governing the stepper motors, it is incorporated with the interpreter (translator) for the tranquil process. By this controller stepper motor can control by 2 pinouts, one pin is to regulate the direction of motor revolutions and other is for steps regulation of motor.
It works on 3 to 5.5V and it consumes per phase two amperes current in presence of the proper cooling environment. It consists of an immovable off-time current controller which has the capacity to works in sluggish or assorted falling-off styles. In today's post, we will have a look at its cascading, pinout, sorts, uses, etc. I will also share some li ...
Hello friends, I hope you are all fine and will be doing something interesting in your life. in today's post, I am going to discuss Introduction to DHT22. It is a temperature and humidity measure sensing device. It is easily used but it needs a specific time for an operation. Its temperature measuring range is from -40 to +125 degrees Celsius with +-0.5 accuracy. This sensor measures moisture content and temperature. This sensor is easily connected to other microcontrollers.
DHT22 plays an important role in our environment in measuring temperature and moisture. It is a low cost easy-to-use small sensor. This sensor is used at different weather stations to measure temperature and ratio of moisture in the air, in this way, they tell about tem ...
Hello friends, I hope you all are doing great. In today’s tutorial, we will discuss What is Full Wave Rectifier. Transformation of alternating current into the direct current is known as rectification. This conversion can be done by using a single diode or more than one diode. The diode that used for rectification is named as a rectifier. There are 2 main categories of the rectifiers, the first one is the half-wave and the other is full-wave rectifier.
In half-wave rectification circuitry, there is only single diode is used to convert alternating current into the direct current. So it can very easily design for rectification. But it has one drawback that it converts one half of the AC wave into direct current. Due to this, there is a higher power ...
