Circuit Diagram of Cheap Programmer

AVR ISP interface (optional but useful if the bootloader is not preferred, if budget constraints prevent the use of JTAG, or if AVR Studio has crashed and disabled on-chip debugging). The following is the updated bill of materials for the...

led interface with microcontroller

How to interface an LED with Microchip's PIC microcontroller. Connecting LEDs to a PIC microcontroller is fundamental for microcontroller development. This guide presents a simple embedded program for the PIC 16F877A to interface LEDs, making it suitable for beginners interested...

Interactive Voice Response System

Nowadays every institution needs automation. As a part of college automation, a project has been developed for a Voice Interactive System for College Automation. This project allows users to quickly access student attendance and marks through the telephone line without...

Microcontroller interfacing with RS 232

Standard serial interfacing of a microcontroller (TTL) with a PC or any RS232C standard device requires a TTL to RS232 level converter. A MAX232 is used for this purpose. It provides a 2-channel RS232C port and requires external 10µF capacitors. The...

interafce 16x2 lcd with avr

LCDs are available in various configurations, with the 16x2 matrix display being the most popular. This article demonstrates the interfacing of an ATmega16 microcontroller with an LCD by displaying a simple character. In this project, the LCD operates in 8-bit...

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...

measurement conductance cell constant

A small transmitter board interfaces with a microcontroller and conductivity probe to measure liquid conductance and conductivity. Precise equations and measurements are provided for this microcontroller-controlled conductivity meter. The described circuit consists of a compact transmitter board that serves as an...

pc based digital ic tester

Check the following ICs: 7400, 7402, 7404, 7408, 7432, 7486. A Visual Basic program is utilized to display the results on the PC. The microcontroller AT89S52 receives the IC number from the PC, verifies the logic gates with the truth...

PIC hydro system controller

The ELC presented here has some flexibility, thanks to being software-controlled, but also has its limitations: It's intended for microhydro systems that employ a single-phase synchronous alternator, working at 220-240V, 50Hz, in a power range up to 25 kilowatts, and...