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Trippy RGB

August 20th, 2009 0 comment

Trippy rgbTrippy RGB is very fun, especially when there are 2 or more of it, so I built two circuits, which were the same. It has a little RGB lamp which varies it’s colors from red to green to blue when nothing is moving. But when you wave your hand in the air above the circuit, the light becomes red no matter which color it was before and starts it’s cycle again. This is because it has sensitive elements, so when your hand is waving, the signal comes from the sensor to the chip and from the chip to the light. If you have a lot of these devices, you can make a wave of red lights, it actually looks very cool.

Electronic game

August 20th, 2009 0 comment

electronic gameAfter I made the Noise kit, I built an electronic game – it has two buttons and three lights, everything else are the circuit parts and a chip, which has 4 games programmed in it – it receives the signals from the buttons and makes the lights light up at the right time(depending on the game rules). 3 of these games for two players and one is for one player. Games are pretty simple but fun. You can easily kill your time with this device.

Noise kit

August 20th, 2009 2 comments

Noise kitThe first thing that I built and soldered from the PCB and parts was a noise kit. It is pretty simple, but the noises that it can make are amazing. I could even make the sound of a bird with this thing. In order for it to make noises you need to plug a dynamic in it(it has an audio output). If you are using headphones instead of dynamic, do not put them into your ears – sound is too loud, it can hurt your ears. All you have to do is to put your thumb on the two circles on the left side of the PCB and play around with other circles and LEDs(They react on your movement and change the noise).

Camera lesson

August 20th, 2009 0 comment

My today’s practice with a digital camera was about changing shutter for a moving car with an autimatic aperture, changing shutter for the same picture with a fixed aperture and making a matrix of aperture-shutter varying pictures of a fixed object with some fixed background.

For the moving car, I figured out that for the best quality I need to use shorter shutter and an automatic aperture, because when I increase my shutter time, the car slowly becomes more and more blur. This is because the car is moving, so I need to catch the picture quicker, the blur must be ranged less than 0.25 inch.

When I made pictures of static bushes, I put a fixed 5.6 aperture and varying shutter. I figured out that with a shorter shutter, picture becomes darker and with a longer shutter it becomes lighter. The longer shutter I use – more light comes into my picture.

The last thing that I did was creating a lot of pictures of the same chair, but with varying aperture and shutter. That allowed me to create a 2-dimensions matrix with an aperture on a vertical side of the matrix and a shutter on a horisontal side. Aperture varied from 3.5 to 16 and shutter varied from 1/6 to 1/500. Then I looked at my matrix and saw that in the top-left corner pictures are very light and in the bottom-right corner pictures were very dark. All the pictures looked optimal and pretty much the same on a diagonal from bottom-left to top-right corner. So now I know that a combination of equally(proportionally) placed aperture and shutter can make what I want – all I need to know in order to make a picture with manual programm is: do I want it quick for a moving object or do I want it light for the dark place with a little bit of light – then I set my aperture and shutter in order for my picture to be on that optimal diagonal.