A web configurable ThingSpeak logger, build on AVR ATmega328

Davide Gironi posted an update on Xively logger project we covered previously: This embedded platform is a modular and configurable ThingSpeak data logger, built on an ATmega328 micro, usefull to send datapoints to your ThingSpeak feed. This project is an update to the Xively logger presented here See the full post on his blog here.

Precision pressure meter with the Bus Pirate

Scott Harden has a nice build log on his precision pressure meter project: I just completed building a device capable of measuring temperature to one hundredth of a degree Celsius and pressure to one ten-thousandth of a PSI! This project is centered around an ICstation MS5611 temperature sensor breakout board which was small enough to […]

AMQUMO: A Xively AMbient QUality MOnitor built on ATmega328

Davide Gironi published a new build, AMQUMO -an ATmega328 AMbient QUality MOnitor: AMQUMO logs 4 environmental parameters: -Humidity -Temperature -Ambient Noise -Brightness The data it is logged to the xively.com platform, and displayed to the user through 4 bi-color leds. It can be used to monitor you Office Ambient Quality over the parameters logged. This project […]

CO2 meter and Xively logger with NDIR infrared sensor built on AVR ATmega328

Davide Gironi published a new build an AVR ATmega328 based CO2, temperature and humidity logger and meter: It logs data feed, CO2 in air in terms of ppm, temperature and humidity to a xively.com feed. It also display realtime data to user through a 16×2 characters LCD. This logger it is based on the xively logger […]

A web configurable Xively logger, build on AVR ATmega328

Here’s an ATmega configurable Xively logger platform by Davide Gironi: Xively (formerly Cosm and before that Pachube) is a platform devoted to simplifying the interconnection of devices and data with applications on the Internet of Things. It is an on-line database service allowing developers to connect sensor-derived data (e.g. energy and environment data from objects, devices & […]

Introducing RFToy, an Arduino-compatible gadget for radio frequency modules

Ray Wang from RaysHobby has informed us of his latest open-source project called RFToy: it’s an Arduino-compatible microcontroller board for interfacing with radio frequency (RF) modules, such as the popular 433/315MHz transmitter/receiver, and the nRF24L01 transceiver. The RFToy has a built-in ATmega328, USB-serial converter (CH340G), 128×64 OLED display, three buttons, and a coin battery holder. Programming […]

Gamecube controller to N64 adapter

Scasagrande shared his Gamecube controller to N64 adapter in the project log forum: Today I bring to you my Gamecube controller to N64 adapter. Basically I was playing my N64 and was sad about how the analogue sticks are getting old and loose. So I did some research, found some Arduino code someone had already written, […]

DIY Binary clock in an old hard drive shell

x2Jiggy wrote a post on his blog detailing the build of his DIY binary clock: This clock uses a minimalist design constructed in the shell of an old hard drive. A DS1307 Real Time Clock (RTC) module keeps accurate time while an ATMega328 (with Arduino bootloader) microcontroller determines which LEDs should be lit to display the current […]

BLDC motor control using Atmega328

Nich Fugal from Makeatronics is working on a BLDC motor controller. I call it a smart BLDC commutator. In a nutshell it’s a dedicated atmega328 that monitors the hall effect sensors on a brushless DC motor and takes care of the commutating and driver circuitry. It’s smart because it has the ability to extract and […]

Fast PWM and electromagnetic interference

Marios Andreopoulos writes: A few days ago I wrote a blog post about Arduino and EMI. By using fast PWM and a plain breadboard wire, I was able to detect electromagnetic interference using a usb TV tuner, with its antenna near my circuit. Not only that, but by manipulating duty cycle to create a primitive […]

PlingPlong – A portable synth

Another cool project by Mats the PlingPlong, a two octave touch keyboard with four channel polyphonic synth: This is a small (10x20cm 4×8″) portable battery-operated synth with a two octave touch keyboard and four voice polyphonic digital sound. I’m using two microcontrollers on the board – a Microchip PIC18F44K22 for the user interface and a Atmel ATMEGA328 […]

RFM12Pi V2 – Raspberry Pi wireless expansion board

Glyn Hudson over at OpenEnergyMonitor posted an update on the RFM12Pi Raspberry Pi wireless expansion board: Here is the latest version of the RFM12Pi Raspberry Pi wireless expansion board. Like the V1 the RFM12Pi V2 allows the Raspberry Pi to receive and transmit data via RFM12B 433/868mhz from and to other wireless nodes such as the emonTx, […]

Wireless voice-controllable smart home project

Wireless voice-controllable smart home project by Jiayuan Wang and Sheng Zhang from Cornell University, built as a final project: There are two CPU in our project, ATmega328 and ATmega1284. We set up the wireless communication by two Xbee chips. One of them connects with ATmega328 working as the transmitter to transmit the signal, another one […]

AVR/V-USB combo tool hacks Win 7

András Veres-Szentkirályi, IT security expert, OSCP, GWAPT, writes, “I’ve built a device that acts as a USB HID keyboard, enters a script as a series of keystrokes into a PC, which can extract itself into an executable. This in turn can send files on the PC back to the device using the NUM/CAPS/SCROLL lock LED […]