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9 Oct 2010

This project shows how to build a 3D Led Globe. It uses a pair of homemade coils to transmit AC power to the device that is rotating. It is also uses an AVR processor and shift registers to power the LEDs. Source and schematic are available on the link below.

3D LED Globe – [Link]

29 Sep 2010

V-USB is a software-only implementation of a low-speed USB device for Atmel’s AVR® microcontrollers, making it possible to build USB hardware with almost any AVR® microcontroller, not requiring any additional chip.

V-USB: A Firmware-Only USB Driver for Atmel AVR Microcontrollers – [Link]

27 Sep 2010

This project shows how to build a Digital clock with 32×8 LED matrix display based on ATmega168 microcontroller. It doesn’t use a RTC timer chip but timer interrupt triggered via external crystal at 32.678kHz. It allows generating exact 1sec intervals while AVR is running with internal system clock at 8MHz.

Digital clock with 32×8 LED matrix display - [Link]

24 Sep 2010

This project shows how to build a full featured AVR time-lapse unit. It is based on ATmega168 and uses 12KB of code. It can be used to take time lapse photographs. The unit features a rotary knob to navigate through the menu. [via]

Phototrigger: AVR time-lapse photography - [Link]

16 Sep 2010

This project shows how to interface an ATMEL AVR microcontroller with a Graphics LCD. It’s actually a C library for AVR-GCC/AVR-LIBC to access  SED 1520-based graphics LCDs. [via]

This is a C-library for avr-gcc/avr-libc to access SED1520-based graphics-LCDs. The modules used to develop the library only support “write to LCD”, read-modify- write on the display RAM is not possible. So this Library uses a “framebuffer” which holds the display-content in the AVR’s SRAM. For a 122*32 pixel display around 500 Bytes of SRAM are occupied by the buffer. The library does of cause support modules which can be read in “write-only-mode” (tie the R/W-Pin to GND).

Driving Graphics LCD using Atmel AVR - [Link]

4 Sep 2010

This tutorial will teach you how to use external and pin change interrupts on an AVR microcontroller. I will be using an ATmega168. The general principles apply to other AVR microcontrollers, but the specific vary greatly.

External Interrupts on an ATmega168 – [Link]

2 Aug 2010

In this two series tutorial learn about the tools and basic steps needed to start programming Atmel AVR microcontrollers in C programming language. It is written to people who are new to programming this type of microcontrollers. The AVRJazz Mega168 board will be used, however this information can be used for other AVR family.

Starting Atmel AVR C Programming Tutorials – [Part1] – [Part2]

1 Aug 2010

This project is an AVR spectrum analyzer based on Atmega8 AVR microcontroller an operational amplifier and a few other components. It uses HD44780 compatible LCD or VFD and supports following displays: 16×2, 20×2, 24×2, 20×4.

AVR acoustic spectrum analyzer - [Link]

31 Jul 2010

Folowing up the last Protostack board update there is a new one.

Today is released version 1.5 of  AVR 28 pin development board. As with previous versions there are many improvements including support for both IGO (Input/Ground/Output)  and GOI (Ground/Output/Input) style of voltage regulators. (e.g. L7805 and LD1117). The full article is available on the link below.

New version of Protostack AVR 28 pin board - [Link]

28 Jul 2010

This is a simple and easy to build AVR programmer connected to serial port. It can be used with PonyProg or Avrdude software programmer. It is based on SI-Prog from the author of PonyProg software.

Simple Serial Programmer for AVR - [Link]





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