Monday, February 19, 2018

Circuit Schematic Raspberry Pi RFID Reader Interface using the EM-18 RFID Reader

Eltronicschool. - This is one circuit schematic for you who want to impplement your RFID reader with Respberry Pi in this time. With this circuit schematic, now you can learn more to connect and program your project based on RFID and Raspberry.

In this time, eside we will show you circuit schematic, we also will give you the description of this circuit and the last we will give you the link to read more about this circuit schematic from original source.

Circuit Schematic

Component Part

  • Raspberry Pi 3 Model B
  • EM-18 RFID Reader Module
  • RS232 – to – USB Adapter (as my RFID Reader has only RS232 Output)
  • Few RFID Cards or RFID Tags
  • Power Supply for RFID Reader (my RFID Reader has a 5V Regulator)
  • 5V Supply for Raspberry Pi and RS232-USB Adapter
  • Connecting Wires
  • 680Ω Resistor (1/4 Watt)
  • 1.5KΩ Resistor (1/4 Watt)


Description

Circuit schematic like in Figure 1 above is Raspberry Pi RFID Reader Interface using the EM-18 RFID Reader. Electronicshub site describe that On Raspberry Pi, the GPIO14 and GPIO14 i.e. Physical Pins 8 and 10 are the UART TX and RX Pins respectively. As we have already enabled the Serial Port of the Raspberry Pi, you can connect these pins to the external peripherals.

It is now a good time to note that Raspberry Pi works on 3.3V Logic. Hence, the RX Pin of the Raspberry Pin must only be given with 3.3V Logic. In order to do that, we need to level convert the TX line of the RFID Reader to 3.3V using a simple Voltage Divider Network consisting to two resistors.

I have used 680Ω and 1.5KΩ resistors. The output of the voltage divider is connected to the UART RXD pin of the Raspberry Pi i.e. GPIO15. Make a common ground connection between the Raspberry Pi and the RFID Reader Module.

And now you can read more about the Raspberry Pi RFID Reader Interface using the EM-18 RFID Reader circuit schematic from original source using link HERE.

Tuesday, February 6, 2018

Top Innovation: Find Lost Items Out of Bluetooth Range to Improve Your Daily Life

Eltronicschool. - This is one of the top innovation in electronic engineering to you to improve your daily life with the efford to find lost items out of bluetooth range now. And this is the article titled Top Innovation: Find Lost Items Out of Bluetooth Range to Improve Your Daily Life.

Image Courtesy of https://electronicsforu.com

Bluetooth-enabled item locators are small tag-like products that you fix to your belongings. When you are unable to find something, you can make the tag/locator beep or ring, follow the sound and find the item. It helps to find even a phone in silent mode. TrackR Bravo is one such item locator, but what makes it better than the rest of the breed are features like Crowd Locate.

Crowd Locate helps you find your belongings even when these are out of your Bluetooth range. If your umbrella is buried under the cushions, you can find it using any normal Bluetooth locator, but what if you left it at a clinic? Whenever you miss an item, the TrackR app records its last known location on a map. When another TrackR app user comes within Bluetooth range of your lost item, its location is automatically updated in your app. This makes it easier to find objects lost elsewhere, too. Crowd Locate basically harnesses the power of numbers, as TrackR has sold millions of its devices across nations.


The TrackR app also lets you setup custom ‘separation alerts’ when you are about to forget and leave behind important items like your keys or phone. Likewise, when you are searching for an object, the distance indicator helps by showing whether you are getting nearer the object or moving in the wrong direction. Alexa Integration enables you to just shout out your search instruction when in a rush, and TrackR will find it for you! You can also customise your TrackR Bravo by printing a photo on it or engraving your number so that people can contact you if they find it.

And now you can read more about the article of Top Innovation: Find Lost Items Out of Bluetooth Range to Improve Your Daily Life from original source using the link HERE.

Thursday, February 1, 2018

Microcontroller Projects: Single-Wire 4×4 Matrix Keypad using AVR ATMega 32

Eltronicschool. - This is one of the microcontroller project for you for building single wire 4x4 matrix keypad using AVR ATMega 32 in this time. The main component used in this project are ATMega 32, 4x4 keypad, and also LCD.

In here, beside we will show you the circuit schematic of this project, we also will show you the component parts, and description of this project globally.

Circuit Schematic

Figure 1. Circuit Schematic of Single-Wire 4×4 Matrix Keypad using AVR ATMega 32 (Source: Electronicsforu)

Component Part

  1. ATMega 32 microcontroller
  2. Transformer
  3. Bridge Diodes
  4. IC 7805
  5. Capacitors
  6. 4x4 matric keypad
  7. Resistors
  8. LED
  9. LCD
  10. Variable resistor


Description

Circuit schematic like shown in Figure 1. above is Single-Wire 4×4 Matrix Keypad using AVR ATMega 32. Accordingly Electronicsforu site describe that this tutorial demonstrates a different way of interfacing a 4×4 matrix keypad with ATmega32 AVR microcontroller. Keypad is one of the most important input devices used in electronics projects. It is one of the easiest ways to give commands or instructions to an electronic system. But when designing a traditional matrix keypad, you require more number of input/output (I/O) pins. For example, if you are developing a 4×4 keypad of 16 keys, you require eight digital I/O lines of the microcontroller device.

This project uses only a single analogue pin to achieve the same goal, so the remaining pins are available for other purposes.

Fig. 1 shows the block diagram of the single-wire keypad with liquid-crystal display (LCD). The system consists of a 4×4 keypad that inputs data to the microcontroller through a single wire, ATmega32 microcontroller for processing the received signal, power supply section and a 16×2 LCD for displaying the keys.

Tuesday, January 23, 2018

Circuit Schematic 60V Input 5V with 3A Output DC-DC Converter for Industrial and Automotive

Eltronicschool. - This is one circuit schematic for you who want to build DC to DC converter in this time. Now, you can use the circuit schematic of 60V Input 5V with 3A Output DC-DC Converter for Industrial and Automotive below.

In this time, eside we will show you circuit schematic, we also will give you the description of this circuit and the last we will give you the link to read more about this circuit schematic from original source.

Circuit Schematic

Image Courtesy of http://www.electronics-lab.com/

Component Part


Description

Circuit schematic like in Figure 1 above is 60V Input 5V with 3A Output DC-DC Converter for Industrial and Automotive. Electronics-hub site describe that this is a 60 V 3A step down DC-DC converter. Sample applications are: 12 V, 24 V and 48 V Industrial, Automotive and Communications Power Systems. The TPS54360 is a 60 V, 3 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 65V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146 μA. Shutdown supply current is reduced to 2 μA when the enable pin is pulled low. Under voltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start up ramp is internally controlled to provide a controlled start up and eliminate overshoot. A wide switching frequency range allows either efficiency or external component size to be optimized. Frequency fold back and thermal shutdown protects internal and external components during an overload condition.

And now you can read more about the 60V Input 5V with 3A Output DC-DC Converter for Industrial and Automotive circuit schematic from original source using link HERE.

Tuesday, January 16, 2018

Robot Project: Gesture Controlled Robot Using Raspberry Pi by John

Eltronicschool. - This is one robot project for you who want to explore your knowledge and ability to build robotic in this time. In this project we will show you gesture controlled robot using Raspberry Pi that written by John.

Image Courtesy of http://www.circuitstoday.com

Beside we will show component part that needed in this project, we also will give you global description about this project and we will allow you to read more this project from original source using the link given.

Component Part

  1. Raspberry Pi
  2. Memory Card
  3. Accelerometer ADXL 345 or MPU6050
  4. RF Modul RF Tx and Rx 434
  5. Power supply 5 V mini USB adapter for Rpi 12 V Battery for Robot
  6. Wires Female to male & Male to female
  7. Encoder HT12E (prefer Module)
  8. Decoder HT12D (prefer Module)
  9. Motor Driver L293D (prefer Module)

Description

This is robot project with build gesture controlled robot using Raspberry Pi. Have you ever tired of controlling everything with buttons? Thought of controlling something with simple hand movements by sitting on your lazy couch? If yes, then you are at the right site. In this tutorial we are going to control a robot driven by two DC motors by simply using hand movements. There are different kind of sensors to detect your hand movement like flux sensors, Accelerometers and other gravity based sensors. So for wireless transmission we are going to use RF 434 module which transmit 4 bit data. 4 bit data means you can transmit 16 different combinations i.e., 0000 to 1111. Further in this tutorial we will use an encoder and decoder to avoid interference in the air interface. A motor driver will drive the motors from using the decoder data.

We use our Raspberry pi at the transmitter end to analyze the sensor data and to transmit a data combination to the motor driver to drive the motors accordingly so that the robot can hover around. We will be using a 12 V battery on robot to power the decoder module, receiver module and the motors. At the transmitter end sensors and transmitter encoder module is powered by raspberry pi itself.

And now you can read more the robot project with gesture controlled robot using Raspberry Pi from original source using link HERE.

Wednesday, January 10, 2018

Arduino Project: Metal Detector using Arduino Nano

Eltronicschool. - This is one of the best Arduino project for you who want to develop your ability in metal detector system in this time. This article will discuss to you about how to build metal detector using Arduino Nano.

Beside we will give you the circuit schematic of metal detector using Arduino Nano and also the simple description of this project, and the last we will give you the link to read more about this project from original source.

Circuit Schematic

Component Part
  1. Arduino Nano
  2. Coil
  3. 10nF capacitor
  4. Buzzer
  5. The 1k resistor
  6. 330-ohm resistor
  7. LED
  8. 1N4148 diode
  9. Breadboard or PCB
  10. Connecting jumper wire
  11. 9v Battery
Description

Circuit schematic like in Figure 1 above is metal detector using Arduino Nano. Accordingly Circuit Digest site describe that Metal Detector is a security device which is used for detecting metals which can be harmful, at various places like Airports, shopping malls, cinemas etc. Previously we have made a very simple Metal detector without a microcontroller, now we are building the Metal Detector using Arduino. In this project, we are going to use a coil and capacitor which will be responsible for the detection of metals. Here we have used an Arduino Nano to build this metal detector project. This is very interesting projects for all electronics lovers. Wherever this detector detects any metal near it, the buzzer starts beeping very rapidly.

Arduino Nano is used for controlling whole this Metal Detector Project. A LED and Buzzer are used as metal detection indicator. A Coil and capacitor is used for detection of metals. A signal diode is also used for reduce the voltage. And a resistor for limiting the current to the Arduino pin.

Saturday, January 6, 2018

Color CMOS 24-Megapixel Image Sensor with PureCel Plus-S Technology by Electronic Foru

Eltronicschool. - When you want to update your information about sensor technology in this time specially with image sensor, you can read more about this article titled with Color CMOS 24-Megapixel Image Sensor with PureCel Plus-S Technology that published in Electronic Foru site.

Image Courtesy of https://electronicsforu.com/

The OV24A sensors are OmniVision’s first sensors with 0.9-micron pixels. Built on PureCel Plus stacked-die architecture, the sensors offer quantum efficiency performance matching that of the latest 1.0-micron pixel sensors. The combination of smaller pixels, higher resolution and improved performance makes the OV24A sensors an ideal camera solution for front- and rear-facing camera applications in high-end smartphones.

The OV24A sensor family consists of three individual products: OV24A1Q, OV24A1B and OV24A10.

The OV24A1Q, with its unique four-cell color-filter pattern, is ideal for front-facing camera applications. This sensor has an on-chip, in-pixel binning feature that captures four times more light photons than a standard 0.9-micron pixel, enabling better image quality in low-light conditions.


When used as the primary, rear-facing camera in a dual-camera configuration, the OV24A1B (monochrome) and OV24A10 (Bayer) sensors enable higher zoom ratios and higher-quality still images and video even in low-light conditions.

And now you can read more this article titled with Color CMOS 24-Megapixel Image Sensor with PureCel Plus-S Technology by Electronic Foru, using link HERE.

Tuesday, January 2, 2018

The Scientist & Engineer's Guide to Digital Signal Processing 1st Edition by Steven W. Smith

Eltronicschool. - This is one of the best digital signal processing book for you who want to learn more about digital signal processing in this time. This book is titlled The Scientist & Engineer's Guide to Digital Signal Processing 1st Edition that written by Steven W. Smith.
Image Courtesy of Amazon.com

In here we will give you global description about htis book of The Scientist & Engineer's Guide to Digital Signal Processing 1st Edition by Steven W. Smith and then we will give you some opinion of the reviewer of this book and the last we will give you link to read more this a book.

From editorial review of Amazon site describe that this is the hardcover edition of Smith's classic book. It is also available in softcover under the title: "Digital Signal Processing: A Guide for Engineers and Scientists." The softcover version is slightly less expensive, while the hardcover edition contains an additional 23 page study guide to help newcomers to DSP. The Author's recommendation: Choose the hardcover edition if you will need DSP in the future, and the softcover version if your need is only short-term.

Jerald M. Cogswell review that said "I started reading this book online by chapters because I wanted to learn about Fourier Transforms. That reading exceeded my expectations on my understanding without getting deep into the weeds of mathematics. I was reading it online so often, I decided to go for this hard copy. I find new chapters in the hard copy such as digital image processing and the Z-transform that were not in the online version. The chapters are well organized and any engineer or serious experimenter or inventor will be able to select a specific topic and understand the concepts of Digital Signal Processing without a deep mathematics background. You will need a good foundation in high school Analytic Geometry and the Pythagorean Theorem. Basic calculus would help but you only need to understand logarithms and what the Sigma summation symbol means. With that basic understanding, you will be on your way to being a DSP expert."

Kimberly Craft review that said "This is an excellent college-level introduction to digital signal processing, especially if you wish to learn more about the underlying theory and application; i.e., how signal processing actually works. Yes, there is some math, but it's not the primary focus, and the author is very upfront about this. The author's style is conversational and friendly, and he provides plenty of examples, graphs and pictures, with a focus on the actual mechanics of signal processing. This is in contrast to a number of DSP texts that emphasize the underlying mathematics over the mechanics, some to the point where one wonders how the actual mechanics of signal processing even work. This book fills in those gaps. It should probably be read before taking on a math-heavy course or used in conjunction with one. I would recommend it as a primer or tutorial before beginning a typical engineering course in DSP or to have on hand while working with the standard math-heavy text. It will really fill in the knowledge gaps."

And now you can read more about this The Scientist & Engineer's Guide to Digital Signal Processing 1st Edition by Steven W. Smith from original source using link HERE

Wednesday, December 27, 2017

Microcontroller Projects: Musical Keyboard Using ATMEGA8 with Tune Record, Save and Playback Options

Eltronicschool. - This is one of the best project for you who want to develop your ability in ATMEGA8 programming and design in this time. This article will discuss to you about how to build music keyboard using ATMEGA8 completed with tune record, save and playback option.

Beside we will give you the circuit schematic of Musical Keyboard Using ATMEGA8 with Tune Record, Save and Playback Options and also the simple description of this project, and the last we will give you the link to read more about this project from original source.

Circuit Schematic

Component Part
  1. ATMEGA8
  2. 4017 IC
  3. Resistors
  4. Octave Switch
  5. Transistor
  6. Buzzer
Description

Circuit schematic like in Figure 1 above is Musical Keyboard Using ATMEGA8 with Tune Record, Save and Playback Options. This article aims at developing a Monophonic (Single note) musical keyboard by generating the musical notes frequencies using a microcontroller (ATMEGA8). The project presented in this article is a 12 Key, Monophonic keyboard with the options.

By using a microcontroller with digital outputs, it is possible to generate square waves with the frequencies of musical notes. The 16-Bit timer-counter of the microcontroller is utilized to generate a square wave with desired frequency. The timer counter is operated in CTC Mode (Clear Timer on Compare Match). Each time when a match occurs between the TCNT1 Value and the Output Compare Registers, the Output Compare 1A Pin is toggled. Every time when a key is pressed, the Output Compare Registers of the Timer1 are loaded with a value corresponding to the frequency of the pressed key. 

And now you can read more about this article Musical Keyboard Using ATMEGA8 with Tune Record, Save and Playback Options from original source using link HERE.