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Thursday, March 29, 2012

Light and Laser communication !

Transmitting sound using LED or a cheap laser pointer and receiving it using a photovoltaic cell and a small amplified speaker! The Audio signal modulates the power feeding the laser pointer and so it does change its brightness corresponding to the change in the amplitude of the audio signal. A solar cell converts the variations in light back to electrical signal and outputs it to the small amplified speaker ! 

Monday, March 26, 2012

Composite Video Output (NTSC or PAL) using Arduino and TV-OUT Library!

Composite Video Output (NTSC or PAL) using Arduino and TV-OUT Library!

For creating Grayscale bitmaps: Use Paint (Windows
Convert the bitmap to C Array code using Image2Code (Windows)
Schematic, Library and Wiki:

Friday, March 16, 2012

DIY Home Automation-Twitter remote-controll for home appliances !

Controlling home appliances using Twitter for Computer or for Mobile (iPhone and other internet capable mobile devices)!
Twitter message turning ON/OFF 4 different home appliances!
Arduino UNO - EthernetShield - LCD - Relay

Download Arduino sketch from here!

Ancient Egypt in the History museum of Bern!

The Historical Museum of Bern is the second largest historical museum in Switzerland. It was built in 1894 by the Neuchâtel architect André Lambert. As it was first conceived as the Swiss National Museum (the city of Zurich was chosen to host it later) the architect took as model various historic castles from the fifteenth and sixteenth century.
The museum contains collections related to the history of Berne from prehistory to the present and other permanent exhibitions from Asia and Egypt. It is a heritage site of national significance. Wikipedia
Historisches Museum Bern

Binary vs Decimal usin SN7447 and 7-Segment Display

Saturday, March 10, 2012

Programming the ATmega48A !

Using STK48+ and AVR pocket programmer (ISP) / AVRdude

After installing AVRdude
Under Windows:  --Run cmd then type:
avrdude -c usbtiny -pm48 -u -U flash:w:xxxxxx.hex

Friday, March 9, 2012

Jupiter seen through my Celestron 60AZ

About 628,743,036 million km from Earth.
Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with mass one-thousandth that of the Sun but is two and a half times the mass of all the other planets in our Solar System combined. Jupiter is primarily composed of hydrogen with a quarter of its mass being helium; it may also have a rocky core of heavier elements. Because of its rapid rotation, Jupiter's shape is that of an oblate spheroid (it possesses a slight but noticeable bulge around the equator). The outer atmosphere is visibly segregated into several bands at different latitudes, resulting in turbulence and storms along their interacting boundaries. A prominent result is the Great Red Spot, a giant storm that is known to have existed since at least the 17th century when it was first seen by telescope. wiki

Monday, March 5, 2012

Maison d'Ailleurs in Yverdon-les-Bains !

Maison d'Ailleurs / بيت من مكان آخر

هو متحف فريد من نوعه يختص بالخيال العلمي ويوتوبيا والرحلات الاستثنائية.

Maison d'Ailleurs in Yverdon-les-Bains ist ein weltweit einzigartiges Museum für Science-Fiction, Utopien und aussergewöhnliche Reisen.

Maison d'Ailleurs in Yverdon-les-Bains is a unique museum of science fiction, utopia and extraordinary journeys

 May 2011, Taken at Yverdon-les-Bains, Switzerland

Sunday, March 4, 2012

The Moon as seen through my Celestron 60AZ telescope!

"PowerSeeker 60 features high-quality, all-glass lenses and mirrors. The lenses feature high-transmission optic coatings that provide optimum light allowance and enhance image brightness and clarity. The scope also includes one 20mm (35x) and one 4mm (175x) eyepiece, as well as a 3x Barlow lens that triples viewing power."

The beauty of the swiss nature !!