This is as simple routine how to read 4×4 keypad keys using AVR-GCC language. The keypad is connected to AVR microcontroller 8 bit port. In this example it is B port. You can change ports depending on your needs – this is only an example ant it is not the only way to this. Howt it works. Well very simply. […]
4×4 keypad example using AVR-GCC C language using Atmega Read More »
Introduction In this digital age, new interfaces for musical expression provide much broader musical possibilities than have ever existed before. There is a constant quest to be in harmony with one’s instrument so that music can flow freely from the imagination and take form effortlessly. This sparks an interest in new ways to interact with
A Wearable Wireless Sensor System using ATmega644V Read More »
Many excellent ISP (In System Programming) designs exist for 8 bit AVR microcontrollers. However, most require a pre-programmed microcontroller, or the “Chicken or Egg” problem: you can’t program microcontrollers unless you have one already programmed. Parallel Port or Serial Port solutions have existed, but many modern computers no longer have these ports. The FTDI USB-to-serail
HUB ISP – Solving the USB-Only “Chicken or Egg” Problem using ATMEGA328P Read More »
New version released ! V2.45 (Check version list for details) This construction is based on HappyJTAG Idea, to implement JTAG interface into target avr system and debug it remotly via USB, without specific JTAGICE hardware. All job is done by PC softraware. HappyJTAG version is easy , but not powerfull enough.There is barriere with performance, if
HappyJTAG2 – JTAG AND SPI AVR8 interface using ATmega32 Read More »
If you’ve ever tried to hook up a 3.3V sensor to a 5V micro, you know what I’m talking about – connecting these two can be a problem! There are several ways in which a 3.3V device can be safely connected to a 5v microcontroller. This tutorial will detail a few ways in which this
Sensor Interfacing using ATmega8 microcontroller Read More »
Scanning the web on microcontroller based USB solutions, I stumbled over Objective Development’s freeware USB solution based on Atmel’s AVR architecture. I decided to build up their reference design PowerSwitch with an ATTiny2313 MCU. Since I never used AVR chips before, the first challenge was to set up a code development environment enabling me to modify the firmware to
Atmel AVR-firmware based universal USB-Interface using ATTiny2313 Read More »
This device plugs into a USB port and implements a USB HID keyboard. Instead of doing anything useful, it waits between 30 seconds and 8 minutes and sends the scancode for the Caps Lock key. This will toggle the Caps Lock status on or off. Since the operating system controls the LED on the keyboard,
Stealth USB CapsLocker using Tiny45 microcontroller Read More »
Why Stk500 and USB? Until the beginning of this year a simple parallel port programmer was the only good programmer as it could be used for any device. All device dependent information is stored in the programmer software on your computer. The problem is however that the parallel port is slowly disappearing. Apple does not
AvrUsb500 — an open source Atmel AVR Programmer using ATmega8 Read More »
Introduction. Nowadays, USB is the most popular connection between PC and peripherals such as AVR programmers, printers, scanners etc. For that reason I had to modify my old serial AVR In-System-Programmer (ISP) to work with USB connection. You can say, “use a USB to Serial adaptor to connect your AVR ISP with your PC”. Yes, that could
USB AVR in-system Programmer using ATtiny2313 Read More »
LCDs are often used in microcontroller projects. Most used are these green character displays with two or more rows to display menus, status or debug messages. With mass production of mobile phones, color LCDs get that cheap, that they can be used as replacement. Some time ago I ordered a Nokia 6100 LCD including breakout board from
Flickr images on a Nokia LCD using ATmega48 Read More »
