Monday, October 9, 2017

Simple Circuit Schematic TV Transmitter using Transistor

Eltronicschool. - This is one of the simple circuit schematic of television transmitter based on transistor. This circuit will give you the UK standard 1 FM for audio modulation and PAL for video modulation.

In here beside we will give you circuit schematic of TV transmitter using transistor, we also will give you the global description about this circuit of TV transmitter using transistor from original source.

Circuit Schematic

Component Part
  1. Transistors
  2. Coil inductor
  3. Resistors
  4. Transformer
  5. Diode
  6. Variable capacitor
  7. Capacitors
  8. Variable resistor
Description

Circuit schematic like in Figure 1 above is simple TV transmitter using transistor. Accordingly Circuitstoday site describe that the audio signal to be modulated is pre-amplified using the transistor Q1 and associated components. The transistor Q2 has two jobs: production of carrier frequency and modulation. The pre-amplified audio signal is fed to the base of transistor Q2 for modulation. Capacitor C5 and inductor L1 forms the tank circuit which is responsible for producing the carrier frequency. The video signal is fed to the emitter of transistor Q2 via POT R7 for modulation. The modulated composite signal (audio+video) is transmitted by the antenna A1. This TV transmitter circuit can be operated from 12V DC. Either a 12V DC power supply or a battery can be used for the purpose, using a battery will surely reduce noise and improve the performance. If you are going with a DC power supply, then it must be well regulated and free of  noise.

Tuesday, September 26, 2017

Free Download E-book Beginning Programming For Dummies 3th Edition by Wallace Wan

Eltronicschool. - This is one a book that will give the basic on beginning to program in this time. This book is Beginning Programming For Dummies 3th Edition by Wallace Wan.

Image Courtesy of PDFDRIVE

In this time, we will give you global description about this book and then we will give you the link to take free download Beginning Programming For Dummies 4th Edition by Wallace Wan from external server.

Description

From: Amazon.com

Do you think the programmers who work at your office are magical wizards who hold special powers that manipulate your computer? Believe it or not, anyone can learn how to write programs, and it doesn’t take a higher math and science education to start.
Beginning Programming for Dummies shows you how computer programming works without all the technical details or hard programming language. It explores the common parts of every computer programming language and how to write for multiple platforms like Windows, Mac OS X, or Linux. This easily accessible guide provides you with the tools you need to:
  • Create programs and divide them into subprograms
  • Develop variables and use constants
  • Manipulate strings and convert them into numbers
  • Use an array as storage space
  • Reuse and rewrite code
  • Isolate data
  • Create a user interface
  • Write programs for the Internet
  • Utilize JavaScript and Java Applets

In addition to these essential building blocks, this guide features a companion CD-ROM containing Liberty BASIC compiler and code in several languages. It also provides valuable programming resources and lets you in on cool careers for programmers. With Beginning Programming of Dummies, you can take charge of your computer and begin programming today!
Download

And now you can click the link below to take free download e-book of Beginning Programming For Dummies 3th Edition by Wallace Wan from external server easily now.

Monday, September 18, 2017

Circuit Schematic 3 Phase AC Motor Controller Based on MC3PHAC from NXP Semiconductor

Eltronicschool. - This is one application of the MPC3PHAC IC from NXP semiconductor to build 3 phase AC motor controller circuit schematic look like shown in Figure 1.

Using this circuit schematic you will perform 6 PWM signals for 3 Phase AC Motor controller. It’s very easy to make professional VFD combining with Intelligent Power Module (IPM) or 3 Phase IGBT/MOSFET with Gate driver.

Circuit Schematic

Component Part
  1. MC3PHAC IC
  2. LM7805 IC
  3. Resistors
  4. X-Tal
  5. Transistors
  6. Capacitors
  7. Variable Resistor
  8. Push Button Switch
Description

Circuit schematic like in Figure 1 above is 3 Phase AC Motor Controller Based on MC3PHAC from NXP Semiconductor. Accordingly Electronics-hub site that published this circuit describe that the MC3PHAC is a high-performance monolithic intelligent motor controller designed specifically to meet the requirements for low-cost, variable-speed, 3-phase ac motor control systems. The device is adaptable and configurable, based on its environment. It contains all of the active functions required to implement the control portion of an open loop, 3-phase ac motor drive. One of the unique aspects of this board is that although it is adaptable and configurable based on its environment, it does not require any software development. This makes the MC3PHAC a perfect fit for customer applications requiring ac motor control but with limited or no software resources available.

Included in the MC3PHAC are protective features consisting of dc bus voltage monitoring and a system fault input that will immediately disable the PWM module upon detection of a system fault.

All outputs are TTL signals, Input supply 5-15V DC, DC Bus voltage should be between 1.75V-4.75V, Dip switch provided to set the motor frequency 60 or 50 Hz, jumpers also helps to set the polarity of the output PWM Active Low or Active High and this helps to use this board with any kind of IPM modules since output can be set active low or high. Potentiometer PR2 helps to adjust motor speed. Refer to datasheet of the IC to change base frequency, PWM Dead Time, other possible parameters.

Speed Control — the synchronous motor frequency can be specified in real time to be any value from 1 Hz to 128 Hz by adjusting the PR2 potentiometer. The scaling factor is 25.6 Hz per volt. The SPEED pin is processed by a 24-bit digital filter to enhance the speed stability in noisy environments.

Acceleration Control — Motor acceleration can be specified in real time to be in the range from 0.5 Hz/second, ranging to 128 Hz/second, by adjusting the PR1 potentiometer. The scaling factor is 25.6 Hz/second per volt.

Fault Protection: The MC3PHAC supports an elaborate range of fault protection and prevention features. If a fault does occur, the MC3PHAC immediately disables the PWMs and waits until the fault condition is cleared before starting a timer to re-enable the PWMs. Refer to the graph in Figure 10 for the resistance value versus retry time from data sheet of the IC. Figure 10 assumes a 6.8 kΩ pull up resistor. In standalone mode, this timeout interval is specified during the initialization phase by supplying a voltage to the MUX_IN pin while the RETRY_TxD pin is being driven low. In this way, the retry time can be specified from 1 to 60 seconds, with a scaling factor of 12 seconds per volt.

Monday, September 11, 2017

Circuit Schematic Battery Charger using SCR

Eltronicschool. - This is one of the application of SCR component to build battery chargerBatteries with different potentials like 6V and 9V can also be charged by choosing appropriate components.

Beside we will give you circuit schematic, component parts of this battery charger using SCR, we also will give you the description globally and the link to read more about this project from original source.

Circuit Schematic

Component Part
  1. Transformer
  2. Bridge Diode
  3. SCR TNYN612
  4. Diode
  5. Green LED
  6. Capacitors
  7. Resistor
  8. Variable resistor
  9. Zener diode
  10. Red LED
Description

Circuit schematic like in Figure 1 above is battery charger using basic component SCR. Accordingly Electronicshub site that published this article describe that The AC supply is converted to 15V DC with the help of transformer and bridge rectifier and the Green LED is turned on. The DC output is a pulsating DC as there is no filter after the rectifier.

This is important as SCR stops conducting only when the supply voltage is 0 or disconnected from supply and it is possible only with pulsating DC.

Initially, SCR1 starts conducting as it receives a Gate voltage via R2 and D5. When SCR1 is conducting, 15V DC will flow through the battery and the battery starts to charge. When the charge on the battery is almost full, it opposes the flow of current and the current starts to flow via R5.

This is filtered with C1 and when the potential reaches 6.8V, Zener ZD1 starts conducting and supplies enough Gate voltage to SCR2 to turn it on.

As a result, the current flows through SCR2 via R2 and SCR1 is turned off as both gate voltage and supply voltage are cut off. The Red LED is turned on indicating a full charge on the battery. For more information click HERE.

Sunday, September 3, 2017

Circuit Schematic 434MHz RF Based Wireless Remote Control System

Eltronicschool. - This is one of the radio frequency circuit schematic for you who want to build 434MHz in this time. This is circuit schematic of  434MHz RF Based Wireless Remote Control System.

Beside we will give you circuit schematic of this 434MHz RF Based Wireless Remote Control System, we also will give you the global description of 434MHz RF Based Wireless Remote Control System from original source.

Circuit Schematic

Component Part
  1. HT12E and HT12F IC
  2. RF Module with 434MHz
  3. Resistors
  4. Transistor
  5. Relay
  6. Capacitors
  7. Diode
Description

Circuit schematic like in Figure 1 above is 434MHz RF Based Wireless Remote Control System. Accordingly Electroschematic site describe that this simple RF transmitter, consisting of a 434MHz license-exempt Transmitter module and an encoder IC , was designed to remotely switch simple appliances on and off. The RF part consists of a standard 434MHz transmitter module, which works at a frequency of 433.92 MHz and has a range of about 400m according to the manufacture. The transmitter module has four pins. Apart from “Data” and the “Vcc” pin, there is a common ground (GND) for data and supply. Last is the RF output (ANT) pin.

The miniature 434MHz RF receiver module receives On-Off Keyed (OOK) modulation signal and demodulates it to digital signal for the next decoder stage. Local oscillator is made of Phase Locked Loop (PLL) structure. Technically, this is an Amplitude Shift Keying (ASK) receiver module based on a single-conversion, super-heterodyne receiver architecture and incorporates an entire Phase-Locked Loop (PLL) for precise local oscillator (LO) generation. It can use in OOK / HCS / PWM modulation signal and demodulate to digital signal.

Sunday, August 27, 2017

Adjustable Power Supply Module using XL4015 IC with Circuit Schematic

Eltronicschool. - This is one of the adjustable power supply module for you who want to get adjustable stable DC output for your electronic circuit this time. This is Adjustable Power Supply Module using XL4015 IC for you.

Image Courtesy of Electro Scheamtics

In this time beside we will give you the description of this circuit, we also will give you the circuit schematic Adjustable Power Supply Module using XL4015 IC and also the real shape of this module.

Circuit Schematic

Component Part
  1. XL4015: DC/ DC 180-KHz Buck Converter, 5 A/36 V
  2. M7: SMD version of 1N400x Diode (used here for circuit protection)
  3. HSN3631AS: Numeric Three-Digit LED Display, Red
  4. LM317: Adjustable Voltage Regulator (used here as the dvm power supply)
  5. SS54: Schottky Diode 40 V/5 A
  6. 47 uH/5 A: Power Inductor
  7. 50K MT: Multi-Turn Preset Potentiometer 50K
Description

Circuit schematic like in Figure 1 above is Adjustable Power Supply Module using XL4015 IC. According Electroscheamtics blog describe that power up the module with a stable and accurate dc power supply (such as a regulated 6-V power supply). Then short-press the button on the right side to select which one you need to adjust (input or output). Long-pressing the button on the right side (holding it for >2 s) makes the module enter calibration mode. After releasing the button, the related LED will blink to indicate which voltage is now calibrating, and the numeric display will blink with the present value.

Short-press the button to change the present value. For example, if your power supply is 6 V but the result of voltage meter is 5.8 V, you need to set the value to 6 V.
Short-press the button on the right side to increase the voltage by one unit. Short-press the button on the left side to reduce the voltage by one unit.

Long-press button on the right side to store the redressed value. The preset pot sets the actual output voltage. Calibrate the output voltage reading on the digital voltmeter in the same way above. For example, if your actual output is 3 V but the result on the voltmeter is 4 V, you need to set the value to 3 V. The redressed value will be stored in the non-volatile memory of the module.

Sunday, August 20, 2017

Free Download Atmel Studio 6.2 for Windows

Eltronicschool. - This is one of the best electronic designing software for developing and debugging Atmel ARM Cortex-M MCU based apps that called with Atmel Studio. One of the version of this software is Atmel Studio 6.2 for Windows system.

Image Courtesy of Software Informer

Beside we will give you the dscription of this software, we also will give you the link to take free download Atmel Studio 6.2 for Windows from external server.

Description

This Atmel Studio 6.2 for Windows for you in this time. According Software Informer site describe that Atmel Studio 6 is a program designed for developing and debugging Atmel ARM Cortex-M and Atmel AVR microcontroller (MCU) based applications. The Atmel Studio IDP gives you a seamless and easy-to-use environment to write, build and debug your applications written in C/C or assembly code.

Download

And now you can click the link below to take free download Atmel Studio 6.2 for Windows from external server easily.



Monday, August 14, 2017

Circuit Schematic Touch ON and OFF Switch using 555 IC

Eltronicschool. - This is one of 555 IC application to build touch on and off switch in this time. So, in here you will show the circuit schematic of Touch ON and OFF Switch using 555 IC as the main component.

Beside we will give you the circuit schematic and component part of this Touch ON and OFF Switch using 555 IC, we also will give you the description of this circuit and the last we will give you the link to read more the circuit.

Circuit Schematic

Component Part
  1. 1 x 555 Timer IC
  2. 1 x 3.3 MΩ Resistor (1/4 Watt)
  3. 1 x 1 MΩ Resistor (1/4 Watt)
  4. 1 x Bulb with holder (regular or CFL)
  5. 1 x 5V Relay Module (if relay module is not available, then you need the following components)
  6. 1 x 5V Relay
  7. 1 x 2N2222 NPN Transistor
  8. 1 x 1N4007 PN Junction Diode
  9. 1 x 1 KΩ Resistor (1/4 Watt)
Description

Circuit schematic like in Figure 1 above is Touch ON and OFF Switch using 555 IC. Accordingly Electronichub site describe that the design of the Touch ON and OFF Switch circuit is very simple. First, the GND, VCC and RST pins of the 555 i.e. pins 1, 8 and 4 are connected to GND and 5V respectively. Pin 2 is pulled HIGH using a 3.3 MΩ Resistor and Pin 6 is pulled LOW using a 1 MΩ Resistor.

Two touch plates are connected to pins 2 and 6 as shown in the circuit diagram. In case of the touch to ON plate, one end is connected to pin 2 and other end is connected to GND. Similarly, one end of the touch to OFF plate is connected to +5V and the other end is connected to Pin 6.

The main principle behind the project lies in the basic functionality of the pins of 555 Timer. We know that 555 Timer has 8 pins namely GND (1), Trigger (2), Output (3), Reset (4), Control Voltage (5), Threshold (6), Discharge (7) and VCC (8).

In this, Pins 2 and 6 are used in this project. Now, we see the basic working of these pins. When Pin 6 i.e. the Threshold pin is held LOW, and if Pin 2 i.e. the Trigger Pin is made LOW, the output of the 555 Timer IC will be HIGH and it stays there. This condition can be used to turn ON the appliance.


Now consider Pin 2 is pulled HIGH and if Pin 6 is made HIGH, the output of the 555 Timer IC will be LOW and it stays there. This condition can be used in our project to turn OFF the load or device. And read more HERE.

Tuesday, August 8, 2017

How to measure the voltage using voltage sensor and arduino module

Eltronicschool. - This is one project for you who want to measure the voltage from 0 until 25V using voltage sensor module and Arduino microcontroller in this time. Using this project you will get many information to make sketch, schematic, voltage sensor module and other.

Voltage Sensor Module

Image Courtesy of www.henrysbench.capnfatz.com

Schematic Diagram

Image Courtesy of www.henrysbench.capnfatz.com

Connection with Arduino

Image Courtesy of www.henrysbench.capnfatz.com

Description

Accordingly Henrysbench blog that also published this project describe that the Arduino analog input is limited to a 5 VDC input.   If you wish to measure higher voltages,  you will need to resort to another means.  One way is to use a voltage divider. It is fundamentally a 5:1 voltage divider using a 30K and a 7.5K Ohm resistor.

Keep in mind, you are restricted to voltages that are less than 25 volts.   More than that and you will exceed the voltage limit of your Arduino input.

Sketch

To get the program to measure the voltage sensor and arduino module, you can use the sketch with visit here.