TumblAkH

Jun 15

New office !

New office !

May 11

Testing the android open accessory development kit with Arduino Uno and sparkfun USB shield. Had to tweak the USB library from Google to run on Uno but it seems to work great. The open accessory dev kit is just a demo more than a real “kit” but it shows the path. Thanks Google.

Testing the android open accessory development kit with Arduino Uno and sparkfun USB shield.

Had to tweak the USB library from Google to run on Uno but it seems to work great. The open accessory dev kit is just a demo more than a real “kit” but it shows the path.

Thanks Google.

Feb 09

Program an Atmega328 on a breadboard. The Arduinos are great but sometimes your own circuits needs something different and you only want the atmega without the arduino board. First follow this nice guide Building an Arduino on a breadboard. Then to program the chip you need an FTDI USB interface, I own the older model from dfrobot, the only thing you have to know is: FTDI TX to atmega pin 3 FTDI TX to atmega pin 2 GND and +5v to your breadboard Then start the arduino interface on you computer, choose the board Arduino Duemilanove or Nano w/ atmega328.Put a wire between atmega pin 1 and GND (to RESET),  hit the upload button on your computer then when you see “Binary sketch size: 3788 bytes (of a 30720 byte maximum)” release the wire, you’re done.  Note that you need an Atmega with an arduino boot loader, you can buy them everywhere preloaded or burn the bootloader yourself.

Program an Atmega328 on a breadboard.

The Arduinos are great but sometimes your own circuits needs something different and you only want the atmega without the arduino board.

First follow this nice guide Building an Arduino on a breadboard.

Then to program the chip you need an FTDI USB interface, I own the older model from dfrobot, the only thing you have to know is:

Then start the arduino interface on you computer, choose the board Arduino Duemilanove or Nano w/ atmega328.
Put a wire between atmega pin 1 and GND (to RESET),  hit the upload button on your computer then when you see “Binary sketch size: 3788 bytes (of a 30720 byte maximum)” release the wire, you’re done. 

Note that you need an Atmega with an arduino boot loader, you can buy them everywhere preloaded or burn the bootloader yourself.

Adafruit has a kit called i2c / SPI character LCD backpack to manage a LCD via i2c, Adafruit sells it for 5V LCD, the MCP23008 is said to operate from 1.8 to 5.5v, so it should work. In fact it works very well as you can see with a 3.3V lcd from sparkfun. So it can play with an Arduino FIO or a Chumby hacker board wich are 3.3V based.

Adafruit has a kit called i2c / SPI character LCD backpack to manage a LCD via i2c, Adafruit sells it for 5V LCD, the MCP23008 is said to operate from 1.8 to 5.5v, so it should work.

In fact it works very well as you can see with a 3.3V lcd from sparkfun.

So it can play with an Arduino FIO or a Chumby hacker board wich are 3.3V based.

Feb 05

Chumby vs Arduino

Chumby vs Arduino

Chumby on FTDI cable Do not listen to Adafruit, they want you to dismount the FTDI cable and change pin for the chumby, it’s much more simple to use 3 wires (M/F). Warning, don’t let the pic fool you, I didn’t have yellow wire, but the green wire is on the yellow FTDI cable. Chumby - FTDI GND - Black on BlackRx - Orange on OrangeTx - Green on Yellow Use minicom to get a terminal on linux or Mac os X. sudo minicom -D /dev/tty.usbserial-A900gcFK -8 -b 115200 --noinit

Chumby on FTDI cable

Do not listen to Adafruit, they want you to dismount the FTDI cable and change pin for the chumby, it’s much more simple to use 3 wires (M/F).

Warning, don’t let the pic fool you, I didn’t have yellow wire, but the green wire is on the yellow FTDI cable.

Chumby - FTDI

GND - Black on Black
Rx - Orange on Orange
Tx - Green on Yellow

Use minicom to get a terminal on linux or Mac os X.

sudo minicom -D /dev/tty.usbserial-A900gcFK -8 -b 115200 --noinit

Oct 15

Aprés des footings, des randos, des heures de tennis acharnées, mes chaussures n’auront pas resisté aux 100km de rando aux US, je les abandonne donc dans les poubelles d’un motel de West Yellostone. Je garderai tjs une pensé olfactive pour toi chaussure ! PS: elles étaient noires à la base

Aprés des footings, des randos, des heures de tennis acharnées, mes chaussures n’auront pas resisté aux 100km de rando aux US, je les abandonne donc dans les poubelles d’un motel de West Yellostone.

Je garderai tjs une pensé olfactive pour toi chaussure !

PS: elles étaient noires à la base

Cerf

Cerf

Troupeau de bisons 

Troupeau de bisons 

Geyser

Geyser

Bisons

Bisons

Geyser, de l’eau, des animaux = Yellowstone

Geyser, de l’eau, des animaux = Yellowstone

Belle journée Yellowstone

Belle journée Yellowstone

Grizzly

Grizzly

Piscine avec un PH de 2, ca décape 

Piscine avec un PH de 2, ca décape