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October 15, 2019, 04:45:47 04:45


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pushycat
An effort to put up Construction projects published in Electronics For you Magazine will be done here in this thread regularly. If any other member too has any access to any construction articles from the magazine, is most welcome to post it here. All articles will include schematics, full articles with PCB layouts and codes. Thus material whatever available from the magazine will be posted here, and these are not my projects. Any claims about its non working or discussions about the same may be continued on the regular discussion forums. This thread will be exclusively for posting projects only.
Requests for any EFY published projects such as Code or other info may be continued on this thread:
EFY Magazine projects Requests Code or More
http://www.sonsivri.com/forum/index.php?topic=37591.0


EDIT: Ask for code or hijack this topic and your post will be deleted, and a warning given. Help keep topic clean
« Last Edit: June 15, 2019, 02:07:05 02:07 by pushycat »
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pushycat
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« Reply #200 on: May 03, 2019, 02:56:39 02:56 »

Serial Interface using Phyton (EFY April 2017)
Presented here is a project for a simple transistor’s output characteristic curve-tracer program through the serial interface and PIC microcontroller using Python programming language. Output characteristic curve of a transistor is automated using Python software and serial interface. Application software for collecting the measured value and displaying it on the monitor screen is developed using Python. Engineers and academicians have been using high-level languages like Visual C++, Visual Basic and Delphi for connecting their gadgets/embedded systems with the computer for measurement and control purposes for a long time. Recently, many shifted their preference to Python as their computer language for measurement and analysis. The main advantage of using Python is the support of a large open source community. Python is an interpreted programming language like BASIC, which saves
considerable time during program development because compilation and linking are not required. Programs written in Python are typically much short-
er as compared to ones written in C or C++. Python can be used for writing standalone programs and scripting applications. It is free, portable, powerful
and remarkably easy to use.

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« Reply #201 on: May 04, 2019, 08:59:20 08:59 »

DUAL-LASER SECURITY SYSTEM Using An Old Feature Phone (EFY April 2017)
A  security system having a single laser beam may not be very effective as any moving object or animal can interrupt it, causing a false alarm. Presented here is a security system having two laser beams with calling alert feature, using a basic mobile phone (old model), also known as feature phone. The security system can be used in a restricted area like a farm or as a home security system. When an intruder cuts or interrupts both laser beams at the same time, an alarm sound is generated and an alert call is made to your current mobile phone.

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« Reply #202 on: May 08, 2019, 04:17:18 04:17 »

Wireless GATE ALARM (EFY April 2017)
This wireless gate alarm uses infrared (IR) and 433MHz RF modules. IR transmitter unit emits 36kHz signal and is fitted on one side of the gate’s frame. IR
receiver unit and RF transmitter module, along with the encoder, are fitted on the opposite side of the gate’s frame. The alarm unit is kept inside the house, and it uses 433MHz RF receiver module and musical alarm circuit.

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« Reply #203 on: May 14, 2019, 04:45:22 04:45 »

Configurable DC-TO-DC CONVERTER (EFY May 2017)
Most kits with embedded microcontrollers (MCUs) operate off a single power supply (VCC) source like 5V or 3.3V. But for some experiments you need one or more positive voltages higher than VCC and one or more negative voltages lower than ground. Often, the required current is in several millimperes (mAs). In such cases, you may use ICL7660, ICL7660A or similar integrated circuits (ICs) for the power supply. But voltage and current provided by a single ICL7660 is not sufficient, so you may need two or more ICs in parallel or cascaded to meet the requirement. This article describes a universal configurable module that uses three ICL7660 ICs. The module is flexible and allows all basic configurations for ICL7660 and similar ICs.

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« Reply #204 on: May 17, 2019, 03:46:26 03:46 »

Water pump dry run guard (EFY may 2017)
Here is an effective solution for protection of household submersible water pumps against dry running. Minimum water-level monitoring feature in the circuit is realised using suspended sensor probes to ensure that the water pumps will not run under a dry condition. Besides, switch-on and return-delay features prevent the pumps from unwanted brief operation when handling turbulent underground water.

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« Reply #205 on: May 20, 2019, 01:37:02 01:37 »

Make your own remote controlled robot (EFY May 2017)
To control a robot, the signal is usually sent through a wireless system using radio frequency (RF) and infrared (IR). To send an IR signal, you need a transmitter and a receiver with an encoding and decoding system. The simple circuit presented here can control the movement of a robot using an IR remote that is used for a TV or DVD player, or an equivalent IR remote.The basic working principle of this project is that the signal sent by the IR remote on pressing Play/Record button on the remote is saved in EEPROM of the microcontroller (MCU) in record mode. It plays back the same code (signal) when you press the same button in play mode. The program for the MCU can save 4-bit code (0 to F hex code) in record mode and output the same 4bit code when the button is pressed in play mode. Using the combination of these four bits, two motors installed on either side of the robot (third one being the caster wheel) can be controlled through a motor driver IC. Thus, different codes are used to control different movements of the robot.

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« Reply #206 on: May 22, 2019, 01:43:31 01:43 »

PC based Oscilloscope using Arduino (EFY June 2017)
Oscilloscopes are an essential tool for electronics hobbyists and professionals to verify that their designs would work as expected. PC-based oscilloscopes score over standalone oscilloscopes due to their compact size, low cost and ability to do offline analysis. Here we describe how you can make your own oscilloscope at a very low cost using your PC and an Arduino board as the hardware for signal acquisition. You can use this oscilloscope to capture frequency signals up to 5kHz. The Arduino board, the heart of the oscilloscope, reads the values from its inbuilt analogue to-digital converter (ADC) and
pushes these to the PC via USB port. We have provided here an Arduino sketch, which you can compile and load directly to the Arduino. You also need to install an executable file or application in your Windows PC. This application works as the front-end to plot input signals as waveforms on your computer screen.

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« Reply #207 on: May 28, 2019, 03:43:08 03:43 »

AUTO REVERSIBLE DC MOTOR With Speed And Rotation Control (EFY June 2017)
DC motors are widely used in different machines, mechanisms and motion controls in manufacturing and processing industries. In these machines, it is often required to control speed, direction and the number of rotations of the motor. Some applications require only speed control, some only rotation control and some only direction control. Many applications require control of two or all three parameters.

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« Reply #208 on: June 07, 2019, 01:39:48 01:39 »

ULTRA-LOW-POWER SENSOR HUB Using nRF24L01 Modules (EFY June 2017)
Presented here is an ATmega328P microcontroller-based ultra low-power sensor hub using nRF24L01+ radio frequency (RF) transceiver modules having transmitter and receiver units. The transmitter sends humidity and temperature values of a place to the receiver kept at a remote location for display on an OLED module. The nRF24L01+ module used in the receiver unit is a 2.4GHz transceiver suitable for ultra-low-power wireless applications. It is designed for operation in ISM band (industrial, scientific and medical radio band) of 2.400-2.4835GHz. The nRF24L01+PA and LNA module used in the transmitter unit is similar to nRF24L01+ but has built-in power amplifier (PA) and low-noise amplifier (LNA) circuits, which help transmit the signal to a longer distance and achieve more stable performance for industry standard applications. The search for a low-power system started when some EFY readers questioned a DIY of mine, saying that ATmega328P processor would not sustain 3.3/5 volts. But it worked well because of the extreme low power capability of the ATmega processor. More detail is provided under extreme low power sub-head of this article.

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« Reply #209 on: June 15, 2019, 01:56:59 01:56 »

VOTING MACHINE Using AVR Microcontroller (EFY July 2017)
Polling by electronic voting machines (EVMs) has become a norm during elections. Unlike paper ballot systems, EVMs are safe and reliable as these rule
out the possibility of invalid voting. These are more economical and efficient too. Their compact size saves transportation costs. Here we describe the design of an electronic voting machine based on ATmega16A microcontroller. To cast a vote, users need to press the key against the name of the candidate of their choice. The vote is automatically saved in the microcontroller, and simultaneously the LCD shows the message “Thank You.”  The circuit of the
electronic voting machine is built around ATmega16A microcontroller (IC2), IC 7805 (IC1), a 16×2 LCD (LCD1) and other associated components.

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« Reply #210 on: August 26, 2019, 07:40:53 07:40 »

Arduino-Based SMARTPHONE CONTROLLED ROBOT CAR (EFY August 2017)
Nowadays smartphones can be used to control a host of electrical and electronic devices including motors, music systems and lights. Here we present
an Arduino based robot car, which can be controlled using an Android smartphone having Arduino RC application installed in it. This bot receives commands from your smartphone with the help of a Bluetooth. The ATmega328 chip on the Arduino Uno board comes with a bootloader, which allows you to burn the program to the chip without an external  hardware programmer. After the chip is programmed, it can be removed from the board. The board can be powered from USB connection or external power supply such as batteries or AC/DC adaptors. After connecting the power supply to Vin pin, you get regulated 5V and 3.3V DC on the respective pins of the Arduino board. 5V is used to power the HC-05 Bluetooth module. Serial pins 0 (RX) and (TX) of Arduino are used to communicate with HC-05 module. Pins 4 through 7 are connected to H-bridge motor driver L293D IC. Out of these four pins, pins 5 and 6 provide 8-bit PWM output using analog Write( ) function defined in the asc_car.ino Arduino sketch. Pins 2 and 3 of Arduino (not used in this project) can be used for additional functions like controlling lights, horn, etc.

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