This is a revised version of my LM35 based digital thermometer project that I posted last year. Although it is one of the simplest projects, it is very popular among newbies who are just starting to learn microcontrollers. There was a little flaw in the....

8051 provides a transmit channel and a receive channel of serial communication. The transmit data pin (TXD) is specified at P3. 1, and the receive data pin (RXD) is at P3. 0. The serial signals provided on these pins are TTL signal levels and must be boosted....

A Video Switcher which can be controlled using the computer`s parallel port. Unfortunately, fewer PCs are fitted with parallel pors these days and, for a laptop, it`s not really an option so the need to control the Switcher through a USB port became....

The two optical sensors will give person count to the microcontroller and microcontroller will give this value to MCU-II. The microcontroller will sense the entrance of any person from high to low pulse on input pins (A3 and A4)..

This is one of the most neat projects to build using a PIC. The design of the clock is mainly a clone of Bob Blick `s propeller clock, along with a few modifications of mine. I used a PIC16F84A microcontroller. I`d have to admit that the programming end of....

It is a very simple data logger project based on PIC12F683 microcontroller. The microcontroller reads temperature values from a temperature sensor on a regular interval basis and stores them into its internal EEPROM memory...

This article aims to show you how to control a DC motor though an H-bridge driver chip using the PWM output from a PIC to achieve speed control. Although I am using a PIC microcontroller other controllers such as AVR`s, Basic Stamps and certain Picaxe`s can....

The hardware configuration when using multiple 1-Wire temperature sensors like the DS1820 is very simple, as illustrated in the block diagram below. A single-wire bus is used for communication between the microcontroller and the temperature sensor. It is....

Mother Bug is a simple, interactive electronic message board. disguised as a "bug. " Text messages are pre-programmed into the memory of the device`s microcontroller. When triggered, the microcontroller uses a 5 x 7 LED matrix display to print out the....

To generate a system clock or auxiliary sleep clock in microcontrollers (µCs) and low-power instruments we usually use A 32kHz oscillator. A CMOS inverter....

Generate sinusoidal pulse width modulation (SPWM) signals using the ECCP module in a PIC for generating a sine wave output for use in DC-AC inverter. I have had requests from people asking how to generate the same SPWM signals with other microcontrollers....

Microcontroller BoardsPS-LPC2138 ADK, ARM Development Kit is proposed to smooth the progress of developing and debugging of various designs encompassing of High speed 32-bit MCU from NXP. The board supports NXP`s LPC214x family devices with various memory....

So far the idea has been to show you how the Arduino Uno board and its Atmel ATMEGA328P microcontroller can interact fairly simply with the outside world. This time we`re simplifying the electronics but ratcheting up the demands on the microcontroller by....

The problem is when i connect the 8051 to the encoder the data send is not received at the receiver but as soon as the 8051 connections are removed the transmisison works perfectly. thus manually the RF communication works perfectly i. e the 8 bit data which....

The new design of a tutorial board based on the popular PIC16F84A microcontroller. Have a features eight single leds, an LCD display and five push ...

The data logger consists of a simple op-amp amplifier circuit that amplifies the signal and sends it to be digitized by a PIC16F688 microcontroller, serialized, and sent to the computer`s serial port via a MAX232 serial driver: I guess you are already....

A microcontroller (MCU) is a small computer in a single integrated circuit consisting of a CPU is relatively simple combined with support functions such as crystal oscillators, timers, sensors, serial and analog I / O etc. Microcontroller designed for small....

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Turn ON or OFF electrical devices using remote control is not a new idea and you can find so many different devices doing that very well. For realization....

In this interface session we are interface mcp3202 adc interface with 8051 microcontroller. Mcp3202 is a 12bit spi protocol adc, is interface with P89v51rd2 microcontroller,this microcontroller have spi protocol so no need to worry about SDI,SDO,CLCK.....

The circuit diagram and code on how to connect an 16x2 LCD to a PICAXE-18M2 microcontroller....

Ethernet has traditionally been a quite complex interface. All Ethernet chips until today had 100 pins or more, where difficult to find in small quantities and difficult to use from a small microcontroller with little memory. Microchip has changed the world....

Perhaps we often see robots line follower robot which is going to follow the line on the track. in general line follower robot is controlled by a microcontroller, but in this article online follower robots in the design without using the microcontroller. For....

Used a 12V motorcylce Battery and an ignition coil of a car. A microcontroller produces some pulses to the base of a 2N3055 transistor. 2N3055 turn on an off the primary of the coil and the desirable sound is produced between the probe and the surface. I....

Interface an LED with AVR (ATMega16). Here I am using only one AVR microcontroller ATMega16, one register(10K), one capacitor(16uF/25v), One push button switch, Led BAR Green in stead of 8 led`s, power supply of +5v and -5v. Make the circuit as in diagram.....

A few months ago Milardo starting to study the 8051 Microcontroller. From his research Miardo has designed a new circuit and called it 3-Digit Display Scoreboard with 4x4 Keypad Matrix....

Resign a complex solution using few external components, resulting an low cost application that provide a high precision measurement. This Digital thermometer microcontroller project use watchdog timer function to measure temperature. The WDT on all....

Many microcontroller designs typically mix multiple interfacing methods. A microcontroller (µC) system can be viewed as a system that reads from inpu....

How to make a Clap-Clap on / Clap-Clap Off switch circuit! Hi all! This instructable not only gives the reader the information needed to create a clap-clap....

Controlling a relay with stm32 micro controller. For the isolation I have used a 4N33 opto-isolator. As my relay coil needs around 250 mA, I used a mps222 transistor. I figured that the logic gets inverted when I used the gpio as the source voltage for the....

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