This amplifier may also be suitable for other computer games machines, although the audio-video connectors will be different. You will have to work out the necessary connections yourself.
Published: August 17th, 2008
This idea is used in old days. Old engineers could not get the good audio transistors. Therefore , they tried to construct an audio power amplifier with a chap switching transistor.
Published: August 13th, 2008
Many times we needed to strengthen a small signal in the region of VHF or FM. The preamplifier that to you we propose offers 20dB in all the region of VHF and it still can reach also their 500MHZ.
Published: August 13th, 2008
The main difference between single-end and push-pull, is distortion. In fact, SE produce a lot of harmonics, so a lot of distortion. Beside this is a bad idea for a power amp, this is really what a lot of people call a real tube sound.
Published: August 13th, 2008
Here is a fairly simple regulated power supply circuit using a zener reference and a series pass transistor that I built to power a vacuum tube microphone preamp project. It\'s not really something that I designed. It\'s just based on text book examples, some existing circuit designs, some tinkering on my part, and a lot of help from friends.
Published: August 13th, 2008
This project is a small, 3 white LED flashlight. It can provide a conservative minimum of 60 hours of usable light.
Published: August 13th, 2008
The unit is powered from an external PSU, since this is cheaper than buying the individual parts! One of the low cost unregulated types with an integral mains plug is suitable, providing it is capable of supplying between 10 and 18 Volts DC at 500mA without too much ripple, the voltage regulator U21 will run cooler if the voltage is nearer the lower end of this range. The types sold for powering electronic keyboards appear to be the most suitable. The prototype is powered by an old Sinclair ZX81 PSU (type UK1200).
Published: August 17th, 2008
A friend of mine bought a really old 122 key Memorex telex keyboard at somewhat of a mysterious place, it was really dirty and probably used a lot but it looked very cool. He cleaned it very thoroughly up to the point where it looked almost brand new, hooked it up to his computer and.... nothing. This was somewhat disappointing.
Published: August 10th, 2008
This simple power supply unit was designed for use with the EPROM Programmer Mark 2. It is equally suitable for powering the EPROM Emulator.
Published: July 26th, 2008
This document presents an introduction to the general concepts and performance of three-dimensional audio technology. Several audio technology categories are defined with the purpose of creating a common understanding of better-than-stereo audio playback methods.
Published: July 13th, 2008
Gamma correction matters if you have any interest in displaying an image accurately on a computer screen. Gamma correction controls the overall brightness of an image. Images which are not properly corrected can look either bleached out, or too dark. Trying to reproduce colors accurately also requires some knowledge of gamma. Varying the amount of gamma correction changes not only the brightness, but also the ratios of red to green to blue.
Published: July 13th, 2008
Stand ten feet from your monitor and examine the figure. If the smooth patch is darker or lighter than the background then you need to calibrate monitor gamma. Many computer monitors come from the factory preset for an office working environment which may not be ideal for viewing and editing photographic images. For color accuracy and consistency work in a darkened environment.
Published: July 13th, 2008
In this science project, you will use food dyes to follow the path of water through a carnation. All plants, even those living in deserts, need water to survive. Plants use water to keep their roots, stems, leaves, and flowers healthy and to prevent them from drying out and wilting. The water is also used to carry dissolved nutrients throughout the plant.
Published: August 17th, 2008
The goal of this project is to build a sensor for measuring magnetic field strength and to use it for measuring the strength of different types of magnets.
Published: August 15th, 2008
A spectroscope is a device that lets us find out what things are made of. It works by taking light and splitting it up into its component colors. Different elements make different colors when they glow.
Published: July 22nd, 2008
In this section we will build a toy called the Polariscope. As you can see from the above photograph, the Polariscope creates patterns of beautiful colors, somewhat like a kaleidoscope, but by an entirely different mechanism.
Published: July 22nd, 2008
In this section we will show you how to make a powerful solar concentrator that can cook four or five hotdogs in minutes.
Published: July 22nd, 2008
At either end of the rainbow there is light we can not see. Below the red end is near infrared light, shorter in wavelength than the infrared we feel as heat. Above the violet end of the rainbow is near ultraviolet, longer in wavelength than the ultraviolet light that causes sunburn.
Published: July 22nd, 2008
