This is an example how to interface to the standard Hitachi-44780 LCD using an 8051 microcontroller and SDCC as C Compiler. I use a standard 16-character by 2-line LCD module, see schematic below. Here, I use 4-bit interfacing...

The bus is connected to the 2G—5 shrouded conenctor N9. The two CAN bus signals are fed into the PCP2551 CAN bus transceiver U2. The output of U2 is fed to the UART transmit and receive signals on the PIC16F688 microcontroller U1. 8-pins of the U1 are....

LAN tester circuit diagram provided in two designs. The first design use timer IC 555 and decade counter 4017. The second design use microcontroller ATtiny2313..

Control the state (on/off) and direction of two linear actuators that are really just DC motors. It seems easy but the problem is that the linear actuators are each 12VDC and consume 10 amps of current at full load. I bought a 25A external power supply....

Led brightness control circuit : How to use a simple circuit to control the brightness level of an LED display....

Electromagnetic flow meter : How to measure fluid flow using a magnatic field....

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Produce the varying sampling clock write strobe pulses. So, I settled with this semi-optimal but working design applying an ATtiny2313 microcontroller from Atmel. For a 10MHz sampling clock, I need a 20MHz clock for the ATtiny2313and hence it needs to be....

The A1301 and A1302 are continuous-time, ratiometric, linear Hall-effect sensor ICs. They are optimized to accurately provide a voltage output that is proportional to an applied magnetic field. These devices have a quiescent output voltage that is 50% of the....

PWM waveforms are commonly used to control the speed of DC motors. The mark/space ratio of the digital wave-form can be defined either by using an adjustable analogue voltage level (in the case of a NE555 based PWM generator) or digitally using binary....

In present day, variety good sensors are available to measure almost anything. In this tutorial will explore the wonderful world of sensors, starting with a very simple analog temperature sensor LM35. We will learn how to interface it with PIC MCU and....

The intelligent temperature sensor DS18S20 from Dallas semiconductor is a calibrated precise two resp. three pin device that interfaces direchtly to microcontrollers or PCs producing Celsius readings. The so-called 1-wire protocoll (better "one DATA wire. )....

Use the Microchip C18 compiler to be based around my latest USB framework libraries for both the PIC and Windows. This should provide a smoother path from this basic tutorial to more complex projects. As always I welcome your feedback and suggestions over in....

A very interesting horn driver project presented by Microchip technology is presented in this circuit diagram. This horn driver project is based on PIC16F886 microcontroller, from Microchip. This microcontroller horn driver circuit diagram is very simple and....

This project is used to automate the home appliances through Bluetooth enabled PC. You can use the USB Bluetooth at the PC side and an Serail Bluetooth...

This article explains how to design a stepper motor system using an 8-bit Freescale microcontroller - MC68HC11E9..

Here`s are some circuit diagrams for driving relays from a microcontroller. Make sure you`re using a 5-volt relay (this refers to the coil, not the load circuit), and make sure that the relay has a high enough rating for the load that you`re driving. This....

Personal Safes are revolutionary locking storage cases that open with just the touch of your finger. These products are designed as "access denial" secure storage for medications, jewelry, weapons, documents, and other valuable or potentially harmful items.....

The Atmel Flash devices are ideal for developing, since they can be reprogrammed easy and fast. If you need more code space for your application, particularly for developing 89Cxx projects with C language. Atmel offers a broad range of microcontrollers based....

There are actually very few electronic components necessary for this project as the PIC Microcontroller is the powerhouse doing most the work. The few components necessary like, buttons, switches & power circuit are trivial forms of I/O which makes....

A strip of LEDs from a microcontroller using PWM to control the brightness. The strip I have takes about 1. 5A at 12V. I`m only familiar with purely low power digital electronics so wanted to check if these assumptions are correct and get any advice :-....

This circuit is uses for the general purpose Big LED with SPI serial interfacing. The circuit is using a serial-in-parallel out shift register, 74HC595 for receiving serial data from microcontroller board. This is the figure of the circuit. For wiring the....

Coin detector and counter : How to detect different types of coins from their effect on an oscillating magnetic field....

The Atmel ATmega series of microcontrollers are very popular due to the large number of peripherals inbuilt in them. They have features such as internal PWM channels, 10-bit A/D converters, UART/USART and much more, which are useful for a lot of applications....

The Tiny Remoteis a very compact infrared remote control with only two buttons to control an iRobot Roomba. It produces three different infrare....

This tutorial continues on from ATmega8 Breadboard Circuit Part 1 where we build a small power supply on the breadboard. In this part we will add the ATmega8 microcontroller and an interface to allow it to be programmed. The first step is to orient yourself....

Example if you press number 8 it will effect the wire ROW3 and CLO2. By this the microcontrollercan determine what key was pressed with only 7 wires from the keypad. ..

I am a beginner/hobyist and would like to learn more about Microcontrollers. All I want to do is receive an output on an LCD when pressing a button on the keypad. ..

How to connect and program the Arduino/Atmega168 microcontroller to operate a unipolar stepper motor....

Cool little FM transmitter. Suitable for study purposes, you can use the RF part of this transmitter easily for your projects. However, unless you know how to build a serial data link and connect this LPFM transmitter to a PC or a microcontroller, you won`t....

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High-end audio equipments are normally digitally controlled by a a microprocessor (microcontroller) system. It?s necessary to have? digital interface that...