jdm programmer
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Simplest and low cost USB AVR
This is a low-cost AVR programmer using the ATtiny2313. The schematic diagram is provided below. First, set up the circuit as shown. One important consideration is to configure the fuse bits using the command: avrdude -c usbasp -p t2313 -U...
AVR 1.1V Internal ADC Reference Over-Voltage
When using the internal 1.1V reference for the ADC, if the analog input exceeds 1.1V, such as 2.5V, it will not harm the microcontroller. Instead, the ADC value will clip at 0x3FF. Based on practical experience, it has been observed...
LCD Interfacing with AVR-Atmega8 and Atmega32
Interfacing an LCD display with AVR microcontrollers, specifically the Atmega8 and Atmega32, including a circuit diagram and embedded C code for implementation.
The interfacing of an LCD display with AVR microcontrollers, such as the Atmega8 and Atmega32, is a common task...
Simple AVR Programmers
These are simple AVR programmers. I designed and built four different programmers for various environments: LPT controlled parallel programmer, LPT controlled ISP adapter, COM controlled ISP adapter, and COM controlled generic SPI bridge. Additionally, COM controlled adapters can be used...
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...
Power supplies for microcontroller based projects
This document discusses the use of small microcontrollers, such as those from the PIC and Atmel series, which typically operate at 5V and require less than 100mA for complete system functionality. Some PICs can function at lower voltages, such as...
PIC Freq Counter
A prescaler is connected to a PIC microcontroller to create a basic frequency counter. It is anticipated that this component will serve as a module to be integrated into future design projects. The initial requirement is to obtain a functional...
Tutorial on using ADC (Analog to Digital converter) unit of AVR micro controller
A straightforward tutorial on utilizing the ADC (Analog to Digital Converter) unit of the AVR microcontroller, demonstrated with the Atmega8, including a circuit diagram and code examples.
The ADC unit in the Atmega8 microcontroller is a crucial component that allows for...
AVR terminal for serial port
The LCD display is represented by the connector X1. It has a HD44780 compatible LCD controller and is using the 4-bit interface to send data to the LCD controller. The LEDs are multiplexed. It is possible to connect 12 LEDs...