The AVR Stick is a simple data logging device that instantiates itself as an HID keyboard and reports the voltages, along with a ‘timestamp,’ from two pins on an ATtiny85. The device uses open source firmware availabe from Objective Development (http://www.obdev.at/vusb/) called V-USB to implement the USB 1.1 standard. The code that runs the application was based on the EasyLogger example application from Objective development.
AVR Stick – A simple USB data logging device – [Link]
When i saw simpleavr’s implementation of usbtiny on attiny45 , i thought it would be cool if i make a kit version of this with a minimal form factor. Then i designed a PCB and sent for first prototype. Later on i thought, if i want to sell this, it would be much cooler ,and more suitable with “Open Source Hardware” concept, if i bring this project one step ahead. So i tried to fit anything extra to the device and this project came out.
Little Wire – tinyAVR based multi-tool – [Link]
If you spend any time playing with Arduinos, ATtinys or looking at AVR spec sheets, you soon encounter a bewildering smörgåsbord of acronyms for various communication protocols. With examples such as I2C, LIN, SPI, TWI, USI, etc., it can get pretty confusing. What do these terms mean? How do you choose the chip that meets your needs? How do you make use of these protocols? This guide will take the mystery out of all these acronyms, and provide a brief overview of what they mean and how you use them in your projects.
Guide to Arduino Communications – [Link]
- CodeLock (keyboard, from 1 to 40 codes 1 or 3 ports)
- SmartCard (chip card, chip 1 to 30 cards)
- GsmLock (cell phone, a PIN code)
- CodeLockRF (Radio remote control)
AvrPhone is a simple mobile phone with a touchscreen. His brain is AVR microcontroller ATmega128 (128 kB flash, 4 kB SRAM) and user interface provides 2.4 “LCD display with touch foil and controller ILI9325B , equipped with 16-bit bus. The communication module provides GSM SIM100S čísnkého manufacturer Simcoe. The whole system is powered by a 3.7 V/1000 mAh Li-Pol cells.
AVRphone – [Link]
Charles Moyes (cwm55) and Mengxiang Jiang (mj294) writes:
We built a robust Brain-Computer Interface (BCI) using single-channel electroencephalography (EEG) with an AVR microcontroller, and we were able to play Pong using our brain waves (and monitor/record our sleep). Charles Moyes (cwm55) and Mengxiang Jiang (mj294)
We built a robust Brain-Computer Interface (BCI) using single-channel electroencephalography (EEG) with an AVR microcontroller, and we were able to play Pong using our brain waves (and monitor/record our sleep).
Brain to Computer Interface – [Link]
Hercules Trapierakis writes:
This is a copy paste tool of George’s Homemade Soldering Station but with some improvements and not with a PIC but with an AVR ATMEGA8 uC. I have changed the way that the information is displayed also you can adjust the P I D values and it has a safe mode option – that it will turn off the soldering iron if it is not used for a certain amount of time.
Homemade Soldering Station – [Link]
New display embedded modules BEGV64x from company Bolymin enable to add to your application a graphic output with and a control unit together with a communication interface – all integrated into a single module.
Based on the ATMega644P AVR processor, provide BEGV643 and BEGV641 a relatively high performance at a low power consumption. Used AVR processor provides a higher power than necessary to control the display and module peripherials, that´s why you have a considerable amount of CPU power/ system resources freely available according to your application demands.
Modules contain 1x RS232, one isolated RS485/422/232 port and a high speed SPI/I2C interface. In comparison to development from single components, when using these modules, it is eliminated the need for design of schematics and PCB of a control unit, display unit and a communication interface, power supply part as well as a necessary software. With a built-in in-system programmable 64kB Flash and 4kB SRAM, they provide a decent memory space even for relatively large applications. Another memory space is provided by external 2x 64 kB I2C CMOS EEPROM. Monochrome STN LCD displays with a white backlight provide a very good legibility. BEGV643 has the 320×240 px display resolution and BEGV641 has 240×128 px.
Modules are available in few versions of communication interfaces, detailed information will provide you BEGV643 / BEGV641 flyers and BEGV643 a BEGV641 user manuals. On the page 61/62 of user manuals you can also find links to download software utilities for display and communication interfaces. For a development support there is also available the BEGV643AMGI board with ISP and RS232 connectors.
Bolymin BEGV have a sufficient power to control your applications – [Link]
Le Hung writes:
LCFesR 4.0 unit is a precise, wide range LC / LCF / LCR / ESR meter (tester / checker) that measures inductance (L), capacity (C), frequency (F), small resistance (R) and equivalent series resistance (ESR) of a capacitor inside an electronic circuit (in-circuit). The meter can be built easily with one- or double-sided PCB and available electronic components (DIY). It’s functions are base on an further developed AVR ATMega88PA-PU microprocessor. Professional KIT is also available.
LCFesR 4.0 meter – LC / LCF / LCR / ESR meter – [Link]
Tenty LED Brake Lights. Pete writes – [via]
I Purchased a motorcycle about two weeks ago. Interestingly, whenever I tell someone this news, they immediately proceed to tell me the most gruesome injuries and stomach turning plights that they or someone they know, has fallen victim to while motorcycling. In some cases, these raconteur’s briefly pause to look over their shoulder, presumably scanning for small children or otherwise offendable ears, before delivering the goriest details.
One commonality in these stories, aside from the macabre and arguably poor timing involved in telling them to me is that many accidents come down to a lack of visibility of motorcycles and their riders. Less than Argus-eyed motorists often pull out into the path of a motorcycle and with insufficient time for evasive action, that quickly an accident has occurred. Other times, drivers may focus on the car ahead of the motorcycle and in the event of stopping at a red light or similar, fail to leave enough room.
Tenty LED Brake Lights – [Link]