i2c rtc interfacing with avr primer circuit

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...

0.1 To 90 second timer

The timer interval begins when power is supplied to the circuit and ends when voltage is applied to the load. The 2N2646 transistor is utilized in the oscillator, which generates pulses to the base of the D5K. This configuration decreases...

Fireflies based on tiny AVR

When first encountering this article, it is apparent that it presents an excellent project utilizing only a few components. Microcontroller projects based on LEDs are particularly appealing. This project involves the design and implementation of a microcontroller-based LED circuit, which serves...

Timing within the one-chip computer Counter and interrupt system

This document will present an overview of two critical components within a one-chip computer: the timing/counter system and the interrupt system. Through this explanation, readers will gain insight into the operating principles of these systems. For illustration, consider an alarm...

How to handle digital input/output(I/O) in Avr Microcontroller

How to handle digital input/output (I/O) in AVR microcontrollers is explained using basic programs and circuits to illuminate an LED, generate a stepper motor sequence, read a push-button switch, and implement key debouncing. The handling of digital I/O in AVR microcontrollers...

The improved smart 15-in-1 trigger for SLRs

Step-by-step instructions to build an AVR-based versatile camera trigger with functions such as lightning trigger, sound trigger, interval trigger, slave flash trigger, and bulb mode. The project involves designing a versatile camera trigger utilizing an AVR microcontroller, which can perform multiple...

Scientific Calculator using AVR

This project provides a straightforward scientific calculator utilizing an AVR microcontroller. It features two keypads as illustrated in the circuit diagram, and the results are displayed accordingly. The scientific calculator circuit based on an AVR microcontroller is designed to perform basic...

A Regularly Repeating Interval Timer circuit

This circuit features an adjustable output timer capable of re-triggering at regular intervals. The output duration can range from a fraction of a second to over half an hour, and it can be configured to recur at regular intervals from...

Blinking an LED AVR Tutorial

Blinking an LED is the introductory project for programming microcontrollers. It serves as an effective method to navigate the entire development process and verify the functionality of all tools. This chapter involves connecting a light-emitting diode (LED) to an AVR...