Gardening is one of the common hobbies. It keeps you close to nature. It is healthiest hobby that anyone can have. Though, plants and trees are like pets. They need continuous care without break. One needs to be with them all time. This is not always possible. One may have to go for vacations or business trips or travel for other reasons. At such times, the garden may remain unattended for some time or even could be left unattended for a long period of time.
Fading/Controlling led/brightness using Potentiometer (Variable Resistor) and Arduino Uno
Fading or controlling led brightness using arduino uno and potentiometer/variable resistor is not a very hard task. Arduino predefined libraries made it very easy to fade led with arduino uno. Whats going behind the arduino code predefined commands/instructions at software and at hardware level is important to understand. Students normally start with the pre-written arduino…
Driving relays with stm32f103 microcontroller using uln2003 relay driver
In this tutorial i am going to teach you how to interface relays with stm32f103 microcontrollers. Stm32 microcontrollers works on 3.3 volt TTL logic. Where as electrical relays minimum take +5 volts to make a regular connection. We must need an external circuit to drive relays with stm32 microcontrollers. This post is about teaching you…
Interfacing water flow meter with arduino uno
In this tutorial i am going to teach you about how to use arduino flow meter to measure the amount of water passing through the water valve. Flow meter is actually a valve. One can control the valve manually and digitally in order to limit the flow of water through the pipe. Normally manual water…
Arduino uno bistatic radar demo on hardware
This project is by a final year student of university of liverpool. The project is prototype of a bistatic radar system. Prototype is made using arduino uno and ultrasonic transmitter and receiver. To rotate the ultrasonic transmitter and receiver servo motors are used. Ultrasonic receiver and transmitter are mounted on the top of the servo…
Stm32f103 microcontroller controlling stepper motor by A4988 stepper motor driver module
Stepper motors as the name depicts moves in steps. They are popular in industry due to their ability to rotate their shaft at an accurate location and outputting high torque at low angel movements. One can also control the stepper motor step speed and angle accurately with out the need of feed back mechanism. Though they…
Stepper Motor Speed and Direction Control Using Arduino and Bluetooth HC-06 Module through an Android App
This is a simple tutorial on how to control speed and direction of stepper motor using arduino uno and bluetooth module hc-06 through an android phone app. The motor which i am using is Uni directional stepper motor. Their are two types of stepper motors unidirectional and bidirectional. Uni directional has four phases and bidirectional…
Fading led with LDR(Light Dependent Resistor) using Arduino uno
Blinking an led is basic getting started program/project through which every newbie has to go through upon entering the field of microcontrollers(arduino, pic stm32 etc). After blinking led newly entrants try to explore more features of the particular microcontroller by making some diy(do it your self) projects. Led dimmer or intensity/brightness control of led using ldr(light dependent…
Arduino home security system using Sim900 Gsm module, Pir motion detector and magnetic door contact switch
In this tutorial i am going to make an arduino home security system. One can install this diy arduino security system project on his home main door. The diy arduino security system checks two things. First it checks if some one approached the door? Second it checks if door is opened by the person? When the…
Arduino-based LED chaser with 13 different lighting patterns
An LED chaser or sequencer is a popular LED driving circuit. It’s used in running-light rope displays to flash different lighting patterns. In a chaser or sequencer circuit, a controller commands the sequence and timing of the flashing LEDs to illuminate different kinds of lighting patterns. This LED chaser is built on Arduino UNO. Arduino is…
Decimal counter designed in vhdl
This tutorial is about designing a decimal counter in vhdl. I used xilinx to write code and for simulation i used Isim simulator. The decimal counter i designed starts from 0 and moves up to 999. Counter is working perfectly in simulation. What is Decimal Counter? Decimal counter is same like a stop…
Display custom urdu language characters on 16×2 lcd using pic16f877a microcontroller
In this project i am going to display urdu language characters on 16×2 lcd using pic16f877 microcontroller. Urdu is a language spoken in Pakistan, India and Bangladesh. Character lcd’s generally contains a Hitachi HD4478 controller in it. Hd4478 only contains ASCII character set in it and we can only display the predefined characters that are present in it. It…
Battery voltage monitor with nodemcu Esp8266-12E WiFi module
Measuring voltage of your solar panel, ups and other daily use batteries consumes a lot of time. Grabbing multi-meter, opening the battery boxes and touching both the multi-meter leads to terminals of battery takes some effort. How about developing an efficient IOT system through which you can see the status of your battery on your…
Communication between two esp8266 wifi modules programmed in arduino ide
This tutorial is about inter communication between 2 esp8266 WiFi modules. I will explain the method and code of inter communication between two esp8266 modules. I was working on a cool embedded project in which a wireless communication is required between two motors placed a part on a small distance, also the status of the motors…
Interfacing Latches(74ls574,74ls373) Flip flops with 8051 (89c51, 89c52) Microcontroller
In this project i am going to interface latches with 8051(89c51, 89c52) microcontroller. I am going to interface 74LS574 with 8051(89c51, 89c52). You can also interface any other latch(74ls373, 74ls374 etc) with a slight changes in the connections given in the circuit diagram. The whole project is about, grabbing the status of the latches inputs and then display…
Making and displaying Custom Characters on 16×2 lcd using 8051(89c51,89c52) Microcontroller
This tutorial is about making and displaying custom characters on 16×2 lcd using 8051(89c51,89c52) microcontroller. By custom i mean characters that are not alphabets, digits or ASCII value characters. Rather they are new and designed by us. I first recommend you to please go through the following simple tutorial. This will clear you about the internal structure of…
Difference between interfacing character 16×2 lcd in 4-bit and 8-bit mode with microcontroller
After making many microcontroller projects with character lcd’s(16×1,16×2) and interfacing them with variety of microcontrollers (arduino, microchip pin microcontroller,8051 series,stm32 etc). I still get emails from students about what is the difference between character lcd interfacing in 4-bit and 8-bit mode. So i decided why not to write a post on difference between lcd 4-bit…
Interfacing 7 segment display with stm32f103 microcontroller
This tutorial is about interfacing 7 segment led display with stm32 microcontroller using keil arm mdk 5 with stm32 HAL libraries for code compilation. Stm32cubemx is used to initialize the stm32f103c8t6 microcontroller peripherals/variables pins, operating frequency, oscillator selection etc. Stm32cubemx initialized settings are then imported to keil mdk arm 5 project. Stm32cubemx automatically generates code for…
Difference Between Touch Screens And Normal Keypads
Difference between touch screens and manual keypads Keypad generally comes in 4×4 , 4×3 , 3×4 matrices. Some multinational companies make their own keypads for their projects. Like we see in our daily life the keypad on ATM(Automated Teller Machine) and Photo copy machine is of many variations like 4×5 , 5×4 etc . The keypads on our cell…
Measuring temperature over WiFi: Lm35 temperature sensor interfaced with Nodemcu Esp8266-12e module
This is a simple DIY project on internet of things applications. How to monitor room temperature over WiFi? One can see temperature on his mobile, laptop or desktop computer by this DIY project. Popular Lm35 temperature sensor is interfaced with nodemcu esp8266-12e WiFi module. Nodemcu gets raw temperature voltage form lm35, converts the voltage in…