Vacuum Cleaner With Philips P89lpc901 circuit

A Microchip PIC12C508 8-pin CMOS microcontroller controls a night light, turning it on and off at preset times every day. It is designed to save energy, produce no electromagnetic interference (EMI), and operate without batteries, featuring a built-in lamp fixture...

Microcontroller based College Automation System

This project is a microcontroller-based college automation system aimed at addressing the challenges faced in educational institutions. It replaces the conventional notice board with an automated device that allows users to both hear and read the information being announced through...

Password Based Door Locking

Security is a prime concern in our day-to-day life. Everyone wants to be as much secure as possible. An access control for doors forms a vital link in a security chain. The microcontroller based Door locker is an access control...

motor timer

The primary concept is to rotate the motor slightly every 15 seconds. A monofilament line conveys the motion to the ornament, which is wound by the motor and gradually unwinds as the ornament turns. The charging circuit includes a 1...

Microcontroller Based Telephone Remote Control Circuit

This device enables remote control of various appliances (up to eight with suitable add-on expansion boards) such as lights, water heaters, air conditioning, plant watering systems, alarms, etc., via a relay. It allows users to perform actions such as watering...

Some Voltage Regulator Ciruits for Microcontroller based Projects

A regulated and noise-free power supply voltage is essential for microcontrollers and other components such as amplifiers, filters, and GPS devices. Voltage surges in the supply voltage can permanently damage embedded systems. A voltage regulator must maintain the output voltage...

Electronics Engineering Herald - online magazine of electronics -home

Embedded systems serve as the core of most electronics-based systems, enabling data access, processing, storage, and control. While some simple electronic circuits can be designed without a microprocessor or microcontroller, this approach is often economically impractical, except for basic passive...

Microcontroller measures heart rate through fingertip

The reflected infrared (IR) signal detected by the photodiode is sent to a signal conditioning circuit, which filters out unwanted signals and amplifies the desired output. The circuit begins with a photodiode that captures the reflected IR signals. The photodiode operates...

How to Design Battery Charger Applications that Require External Microcontrollers and Related System-Level Issues

Application note on designing linear and switch-mode (switching DC-DC converter current source) battery charger applications that require external microcontrollers and related system-level issues for notebook computers. The application note provides guidance on the design of both linear and switching DC-DC converter...