by mi.vasilakis @ instructables.com:
Today I will show you how to make your own arduino compass by using the MHC5883L 3-axis digital compass board.
I prefer to build my own arduino based circuit by using the ATmega328p uno possessor, but this is optional for you. Buttons are used for turn on or off display leds and to change display mode of compass.
Arduino Digital Magnetic Compass – HMC5883L - [Link]
In this video we are going to build an Arduino Uno clone in a breadboard using only 5 parts.
Arduino Uno (ATMEGA328P) on a breadboard - [Link]
by Pieter @ piconomic.co.za:
If you can beg, steal or borrow an Atmel ISP programmer, then you can use the Arduino environment to develop on the Atmel AVR Atmega328P Scorpion Board. An Arduino on Scorpion Board guide, Optiboot bootloader and example sketches have been added.
If you own an Arduino Uno board, you can now try out the Piconomic FW Library risk free without abandoning the creature comforts of the Arduino environment. You can use the existing Optiboot bootloader to upload code. I have added a getting started guide for the Arduino Uno. There are examples, including a CLI (Command Line Interpreter) Application that creates a “Linux Shell”-like environment running on the Arduino Uno so that you can experiment with GPIO, ADC, I2C and SPI using only Terminal software (for example Tera Term)… it is really cool!
Piconomic FW Library 0.4.2 released - [Link]
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]
Colin over at CuPID Controls writes:
We want to put our remote sense and control modules out into the wild and read and aggregate them as it makes sense.
Our basic system layout is as below. We’ve got multiple wireless nodes that broadcast data periodically, and a controller/aggregator that will log this data, acknowledge receipt, and do something useful with it. Eventually, we may have intermediate powered nodes that serve to mesh the grid out, but for now, our nodes just send data to the controller.
We’re currently using these awesome little RF units, called Moteinos. They are an Arduino clone that can use the standard IDE with their bootloader. They’ve got the ever-so-popular ATMega328P chip that is familiar to anybody working with an Arduino Nano or Uno.
Adventures in Moteino: Remote temperature monitor - [Link]
Kerry D. Wong writes:
I just got myself a couple of Arduino Due boards. While they were released almost two years ago, I have not really got a chance to look at these until quite recently. Arduino Due is based on Atmel’s ATSAM3x8E 32-bit ARM Cortext-M3 processor. The processor core runs at 84 MHz, which is significantly faster than its 8-bit AVR counterpart ATmega328p which runs at 16 MHz. For an ATmega328p, the highest achievable PWM frequency is 8Mhz (square wave), so we should be able to generate much higher frequency signals on an Arduino Due. But how high can we go? Let’s find out.
On Arduino due PWM frequency - [Link]
Here’s a DIY 38mm x 38mm laser engraver build using CD-ROM/writer on ATmega328p by Davide Gironi:
A laser engraving machine, is a tool that uses lasers to engrave an object.
To build this tool I’ve used two old CD-ROM writer that lays around in my garage.
The X/Y positioning system it is build using the CD-ROM motor assembly. For the engraving laser i use the CD-ROM writer laser.
With this hardware the engraving area are will be almost 38mm x 38mm.
A DIY laser engraver build using DVD and CD-ROM/writer - [Link]
“Plus” version of new graphic modules FTDI with an EVE technology brings a big plus in a form of a compatibility with an Arduino platform.
Innovative graphic chips of the family EVE were introduced to you in our article: Is a display design difficult? Leave it to „Eve“! or also in the webinar in cooperation with the producer – FTDI. This time company FTDI comes with another significant step to make development easier – compatibility with an Arduino platform.
New versions of VM800 modules with the „P“ (Plus) suffix contain besides the graphic chip FT800 and a touch display (3,5/4,3 a 5,0“) a RISC procesor ATMEGA328P (16 MHz) with a precompiled Arduino „bootloader“ (from the supplied 4GB uSD card). It means, that applications can be developed in a free Arduino IDE environment and to use a huge amount of Arduino libraries. “Plus” version also contains a USB interface with the FT232R chip and a precise bezel (Black or Pearl). Also available are over 50 sample “EVE” applications including various gauges, keyboards and other usable in a target device. It can be said, that the Plus series is designed to be directly used not only for development, but also into a target device as a standalone graphic module (HMI) able to control even other peripheries and to communicate through a USB port. The module can be powered through a microUSB connector or from an external 5V adapter.
FTDI brings for a maximum versatility two possibilities of programming:
• through a so called HAL interface (Hardware Abstraction Layer ) enabling cooperation with various MCUs through an SPI interface as described in the Application Note 246 – VM800CB_SampleApp_Arduino_Introduction
• by using Arduino libraries as described in the document Application Note 318 – Arduino_Library_For_FT800_Series
Be in plus with a graphic platform FTDI VM800P - [Link]
This week FTDI Chip have announced a range of Arduino-compatible development platforms to support the company’s Embedded Video Engine (EVE) technology. The VM800P series provides engineers with everything necessary to implement Human Machine Interfaces (HMIs) featuring display, audio, touch elements and data processing aspects too.
The units can be programmed using the standard Arduino IDE (using a pre-programmed Arduino-compatible bootloader). In addition to support for various Arduino libraries, every VM800P incorporates an FTDI Chip FT800 EVE graphic controller IC and its FT232R USB interface IC as well as an ATMega328P 8-bit microcontroller running at 16 MHz. Also featured are a touch-enabled display LCD panel, a backlight LED driver, an audio power amplifier and a micro speaker. A choice of 3.5, 4.3 and 5.0-inch display formats is available which have precision fitted bezels to enable operation in industrial environments. The VM800P units also have a USB serial port for firmware upload and application communication, a battery-backed real time clock (RTC) for carrying out system timing and a micro SD socket loaded with a 4GByte SD card containing sample applications. [via]
Embedded Video Engine for Arduino - [Link]
karllunt @ www.seanet.com writes:
This is pretty much one of those required projects; everyone builds a datalogger in an Altoids can. But each is different and I enjoyed making mine.
Uses ATmega328P (low power, 32K flash for lots of program space)
Uses Maxim/Dallas DS1337 Real Time Clock (uses I2C)
Logs data to microSD flash card, readable on PC (uses FAT32)
Runs on two AAA alkaline batteries
Low power draw (exact consumption varies based on SD card used)
Supports RS-232 for entering commands
Uses CR2032 lithium coin cell for RTC backup
Uses Analog Devices TMP36 for temperature sensor (not shown, it gets wired to the green four-position terminal shown below)
Uses SparkFun 3.3VDC boost converter to provide stable voltage even as batteries die
Datalogger in an Altoids can - [Link]