AVR ATmega8 Based LFR
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Microcontroller interface electrometer
A method for measuring static electricity for a science project was sought. An old copy of "Getting Started in Electronics" by Forrest M. Mims III was referenced for guidance.
To create a static electricity measurement circuit, a simple design can be...
Serial Programmer for AVR microprocessors
Atmel described a simple programmer based on the AT90S1200 (NOT the AT90S1200A) controller in their application note, AVR910 (a modification to use the AT90S2313 is also given below). The circuit is so small and simple, I was able to put...
SERIAL to USB Home Made Using ATmega8
Create a USB to Serial Converter using the ATmega8 microcontroller. The firmware source code for the ATmega8 is available for free download. Since the ATmega8 does not natively support USB communication, the USB communication protocol must be implemented within the...
AVR Bootloader and Programmer
Atmel's application note AVR109 describes a bootloader that utilizes the UART for communication of FLASH programming instructions. It also provides sample C code that facilitates the programming of FLASH, EEPROM, and lock bits. It is important to note that the...
AVR Serial Port Programmer
The entire AVR programmer has been built using common parts and fits in the case of the serial connector. The socket PCB has been created to accommodate a 28-DIP AVR ATmega8 microcontroller, but a socket PCB can be designed for...
repair microcontroller circuit
The difference between these two ICs. A microcontroller is a specialized type of microprocessor designed to be self-sufficient and cost-effective, while a microprocessor is typically intended for general-purpose use, such as in personal computers (PCs). The microcontroller integrates several useful...
2Y-Y-2 - connection four-speed motor switch control circuit
The 3-119 circuit shown in the figure combines switch SA to realize the stator windings, specifically the 2, Y, and 2Y connections, which correspond to the motor speed n1.
The 3-119 circuit is designed to facilitate the control of motor speed...
Sensor Circuit Of Analog Line Follower Robot
The following circuit illustrates the sensor circuit of an analog line follower robot. Features include control by a microcontroller and a sensor circuit.
The sensor circuit for an analog line follower robot is designed to detect the presence of a line...
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...