USBasp ISP with ATmega8

April 27th, 2012 by Fábio Souza | In: Arduino, ATMEGA, ATMEL, Electronics

The circuit is a homemade ISP using an ATmega8 with USB communication and software that allows to program AVR microcontrollers more (ATmega, ATiny) to be used as Arduino, an eco-mode.

It is good to always have a backup scheduler as plan B

The schematic and firmware can be observed here. Below are pictures of the experience.

USBasp on white card test

And here's a reading to an Arduino with an ATmega 328:

Fuse read Arduino

Atmega 328P-PU – DEAF!

March 28th, 2012 by Miguel Ferreira | In: Arduino, Arduino, ATMEGA, ATMEL, Programming

Gave me the ' spoil’ an ATMEGA328P-PU for having cheated on ' fuses '… But there is a remedy :)


True low cost arduino

February 19th, 2012 by Miguel Ferreira | In: Arduino

With half a dozen euros is an arduino, stable and functional.
Bill of material:
– 1 ATMEGA328p
– 1 16 MHz Xtal
– 1 USB2Serie
Some hard wire
A white card and everything is experiences :)
Didn't have the exact value of account that this cost me, but plan to add these pieces all as a kit to sell, the low-cost course.

Soon I'll post more about this topic.

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In Barometric Sensor Ethershield

February 13th, 2012 by Fábio Souza | In: Arduino, Arduino, ATMEGA, ATMEL, Electronics, Intranet and Internet, Programming

This is a preliminary test of a barometric sensor connected to an Arduino board with homemade ENC28j60, that allows you to read the atmospheric pressure in real time using I2C in PA (Pascal) from the point where. It also makes reading of temperature. Is a strong candidate to get in several projects intended for meteorology home.

With Ethershield barometric sensor


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Nokia LCD 3510 Interface with PIC18F

October 3rd, 2011 by Fábio Souza | In: Arduino, Electronics, PIC, Programming

When a mobile phone crashes in terms of software and even some hardware There are parts that can be used for experiments or for projects, in particular the LCD's, saving yourself some money.

The aim is to use an LCD from a Nokia 3510 connected to a microcontroller for information visualization, as done in previous experience, in a Nokia LCD 1100.

It is assumed that this controller is prepared both for the LCD 3510 ( screen with shades of gray), as well as the 3510i (the colors), According to this site.

Look for the welds made in contacts. It is a meticulous and work something that quite calm, as well as a low-power iron (14W) so as not to damage the contacts and the plastic membrane.


LCD flat cable soldier



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My Homemade Arduino

September 16th, 2011 by Miguel Ferreira | In: Arduino, ATMEGA, ATMEL, Blog

As my old arduino was sold (for wine or for something useful), I decided to do a 100% compatible but without the bugs that I had…


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Homemade Arduino with ENC28J60

September 7th, 2011 by Fábio Souza | In: Arduino, Arduino, ATMEGA, ATMEL, Blog, Electronics, Intranet and Internet, Programming

After I complain of my Arduino Duemilenove due to lack of current to power other devices, I decided to build my own in perforated plate, with a 20 MHz crystal, an LM317 1A and a bus to connect ENC28J60. The part belonging to the Arduino occupies as much or less than the original PCB.

Below is the part of the Arduino to function in full, with a FTDI USB to RS232 and external power supply.

Homemade Arduino test


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USBtinyISP AVR Atmel

July 28th, 2011 by Miguel Ferreira | In: Arduino, Arduino, ATMEGA, ATMEL, Electronics, Programming

An excellent way to reprogram Arduinos, among others…

Already bought a few months valiant this programmer, It costs about 15 €, Although you can find between 10 and 40, but decided to purchase where trust and, the past two weeks came, everything ok and functional, the first test I did was with my ' old’ Arduino UNO (We have already dispatched for some time).

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Meteorological Station (Arduino ATMEGA328)

June 29th, 2011 by Miguel Ferreira | In: Arduino, Arduino, Blog, Electronics, Programming, projects

Since some time I have been to develop a meteorological station for the Free Flight Club of Caramulo with an Internet connection to update in real time….

Arduino + ENC28J60 - Estação Meteo de testesThis spaghetti of wires is only one Arduino (changed to 20 MHz) with a network card based on chip ENC28J60 (better than Wiz official), is so linked only to tests of UPTIME and reliability. So far has an uptime of about 2 months and, taking into account that my cat engraçou with temperature sensor…

The first version I made this station is based on the Arduino UNO with the official network adapter (The Wiz between 25 and 50 euros) – A huge waste of money, the second is based on the same in the arduino but this time with a much cheaper (between 14 the 30 euros) and without doubt much more reliable

Now, I am trying to remove all of the potential problems that can happen to me – that being said the main source of problems is the own arduino… Result: use the ATMEGA328 for its ease of programming and information quantity, but on a plate made by me, thus reducing costs and making the project a lot more functional.



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Arduino DS18B20 1Wire

April 25th, 2011 by Fábio Souza | In: Arduino, Blog, Electronics

The idea arose as a means to verify that the temperature of a room was correct before a Mercury thermometer.

Arranged an alphanumeric LCD 20×4 characters, a damaged FAX , but luckily the LCD was OK and there were some samples of 1Wire temperature sensors. The aim would therefore show LCD temperature information.

This was the result obtained, using the Arduino libraries :


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