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23 Jan 2015

 

piconomic_scorpion_board

This minimalistic board is packed with features and comes with an extensive ecosystem of documentation and firmware.

For the student (we are never too old) that wants to fast track his career as a professional firmware developer there is:

  • a detailed getting started guide
  • an Atmel AVR quick start guide, with tutorials and examples
  • Recommend best practices

For the developer that wants to improve his game there is:

  • A header to quickly connect different kinds of peripherals (GPIO, A/D, UART, SPI & I2C). Notice that each interface has it’s own +3V3 and GND pins to make wiring easier and also improves EMC.
  • A full-featured CLI application to experiment with the connected device and verify that it works, before committing to a single line of C code.
  • A firmware framework that lays the foundation so that you can quickly develop a new application.
  • A Temp&Pressure Logger and Analog voltage Logger application that demonstrates how you can quickly develop your own custom logging application using the onboard AT45D DataFlash.

Atmel ATmega328P Scorpion Board - [Link]

20 Jan 2015

USB-Se0Pulse-600x360

Ralph Doncaster writes:

Since the release of V-USB, dozens of projects have been made that allow an AVR to communicate over USB. USB data signals are supposed to be in the range of 2.8 to 3.6V, so there are two recommended ways to have an AVR output the correct voltage. One is to supply the AVR with 3.3V power, and the other is to use 5V power but clip the USB data signal using zener diodes. Most implementations of V-USB, like USBasp, use the zener diodes. I’ll explain why using a 3.3V supply should be the preferred method.

USB interfacing for AVR microcontrollers - [Link]

7 Jan 2015

MZ-Z14_DHT22_xively_logger-600x450

Davide Gironi published a new project 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 you can found here

CO2 meter and Xively logger with NDIR infrared sensor built on AVR ATmega328 - [Link]

29 Dec 2014

UNIO4297

by George Gardner @ georgegardner.info:

This is a project that I’ve been working on for some time now, a good part of my life, but more recently for the past month. I’m not going to go through everything as to how I arrived at this point, but I can assure you it was through a lot of trial and error. I now present to you, the class D avr amp.

Class D AVR - [Link]


9 Dec 2014

640px-LedStepUpCircuit

by hackerspace-ffm.de:

Build a cheap and simple full software controlled step-up (boost) converter to drive a LED string of 10 LEDs. LEDs are used as string to light up a acrylic engraved plate placed in a holder (also made out 5 layers of lasered black acrylic glas). Step up is from 5V to about 30V, current regulated to about 20mA.

LED step-up converter with ATtiny85 - [Link]

1 Dec 2014

pic_0_31-560x336

by labs.rakettitiede.com:

This blog post is about my adventures in implementing a stupidly simple way of transferring data over audio to AVR (and why not other embedded chips too), reaching speeds up to 12kbps with really tiny code and memory footprint, using the internal oscillator of Tiny AVR, with hardware parts that cost next to nothing.

12kbps simple audio data transfer for AVR - [Link]

24 Nov 2014

apps3

An app note from Atmel, digital sound recorder with AVR and DataFlash (PDF!):

This application note describes how to record, store and play back sound using any AVR microcontroller with A/D converter, the AT45DB161B DataFlash memory and a few extra components.
This application note shows in detail the usage of the A/D Converter for sound recording, the Serial Peripheral Interface – SPI – for accessing the external DataFlash memory and the Pulse Width Modulation – PWM – for playback. Typical applications that would require one or more of these blocks are temperature loggers, telephone answering machines, or digital voice recorders.

[via]

Digital sound recorder with AVR and DataFlash - [Link]

22 Nov 2014

simple-auto-irrigation-system-600x345

Here’s an automatic watering system using AVR from Gadgetronicx:

Primitive irrigation systems possess many drawbacks as it fails to conserve water and human energy. So introducing Automation in it can help us to overcome these drawbacks and pave way to conserve water. This can be done with a simple Soil moisture sensor and a Microcontroller, AVR in our case. You can try out this system to automate watering the plants in your home at affordable cost.

[via]

Automatic plant watering system using AVR(Atmega16) Microcontroller - [Link]

21 Nov 2014

a938ea6cb4b3475cce88c4306bdce57a_large

The ultimate combination of an Arduino-compatible board and your day-to-day Gadget in one handheld Device.

Phoenard is an All-in-one Arduino-compatible prototyping Gadget powered by an 8-bit AVR ATMEGA2560, identical to the one you find in Arduino Mega. It is essentially a pocket-sized prototyping platform which you can use as the ‘brain’ in your projects, similar to using an Arduino. BUT, it has a lot more features built into a single case developed in such a way that you can use it as your day-to-day Gadget.

Phoenard: World’s 1st Arduino-compatible Prototyping Gadget - [Link]

9 Nov 2014

Josh Levine writes:

It can be nice to know how much battery power you have. It becomes critically important with LiPo batteries since you can permanently damage them by running the voltage down too low. Typically battery voltage detection requires adding a circuit with extra parts and their associated power requirements. Wouldn’t it be great to be able to do this using nothing but software? Read on for a no parts, no pins, no power solution…

[via]

Battery fuel gauge with zero parts and zero pins on AVR - [Link]



 
 
 

 

 

 

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