at89c4051 digital real time clock circuit
#AT89C4051
#real-time clock
#digital clock
#microcontroller
#timekeeping
#RTC
#clock circuit
#embedded
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Digital alarm clock circuit diagram
U1 is the 3817 integrated circuit, capable of directly driving the display. It can show time in either 12-hour or 24-hour format, schedule alarm sounds, and automatically turn on the radio at specified times. The display utilizes the FND500 light-emitting...
Perfect Pitch Circuit
Perfect Pitch, which is based on the 8751 microprocessor, is an affordable and straightforward instrument tuner and frequency counter that features a built-in headphone amplifier and a visual metronome. Perfect Pitch converts the audio signal from an instrument into a...
Electronic TIC TAC TOE
This project is not to introduce Tic Tac Toe. Everyone knows this game. It is to introduce two features: bi-coloured LEDs, microcontrollers, and the skill of writing an ALGORITHM. You can use the project to learn the skills of creating...
Interface a uC to PC RS232 with MAX232A
This document outlines the standard configuration for interfacing a microcontroller, such as the 8051, with a PC using RS232 through the MAX232A. The UART or serial port was absent in the 8049 and 8749 microcontrollers, which were predecessors to the...
High Resolution Digital Weigh-scale Design Using Z8 Encore! ?® Microcontrollers
The SP6691 circuit is designed to provide a high output voltage using a lower voltage boost regulator by incorporating a charge pump circuit. This configuration can convert a standard 30V boost regulator into a 60V boost regulator if necessary. Testing...
delay
This article outlines the construction of a simple microcontroller-based delay circuit designed for photographic applications, such as drop or high-speed photography. It is capable of controlling the trigger lag for cameras and flash units, generating periodic trigger pulses, or managing...
POWER LINE MODEM FOR COMPUTER CONTROL
This circuit employs an 87C57 microcontroller along with several peripherals to convert X-10 power-line carrier-code formats from a personal computer for use with an X-10 power-line interface in a home-control system. Software details can be found in the reference.
The circuit...
Digital Clock
This is a chronological account of a project to design and build a digital clock based on the Arduino open-source architecture, utilizing the ATMEGA8 microcontroller. The ATMEGA8 is an 8-bit, 16MHz microcontroller with integrated digital and analog inputs and outputs,...
Controlling high-current circuits
Digital output from a microcontroller is typically a low-amperage signal. For example, when a pin is set HIGH on the microcontroller (in Wiring/Arduino, it is digitalWrite(somePin, HIGH);), the voltage from that pin is usually +3.3V or +5V, with the current...