Electronics Engineering

An 'isolation transformer' is a 1:1 ratio mutual transformer. It electrically isolates the secondary circuit from the primary circuit without changing the voltage level. A bathroom shaver socket uses an isolation transformer.

A seven segment display is a device used to display numbers and letters on things such as alarm clocks. A 7 segment display is simply seven LEDs packaged in a pattern that allows numbers and letters to be displayed by illuminating different sets of LEDs.

https://www.youtube.com/watch?v=kveP66YZyKg

in the IC-7805 i need a meaning for the number 7,8,0,5 seperately

According to the Wikipedia article (see related link), Casio released the first graphing calculator in 1985.

metal+life.

this is good to know that there is a way i can find somthing usuful for mi studies

A Diode will pass the electrical current into one direction, and will produce high resistance in the opposite direction. To check a diode, use an Ohm-Meter or a "multi meter", and set to measure resistance "Ohm", in the 1k Scale. You will have two leads in the ohm meter + and - (Red and Black) If you measure the resistance in one direction ( red lead touching one of the diode leads , and the black is touching the other lead ) , and you found a low resistance in one direction, and a very high resistance in the other direction ( by reversing the red/black leads) , this diode should be ok. If you find low resistance in both directions, this diode is shorted, and is damaged If you find high resistance in both directions, this diode is open circuit, and is damaged

Party and Play

Normal radar sends out radio waves to determine the location of an object.

Doppler radar can not only find the location of an object or storm, but using something known as the Doppler effect can determine how fast it is moving towards or away from the radar.

Transfer Characteristic basically is relation between output and input of a electronic circuit. So in case of a series circuit in which a diode and a resistor are in series and the output voltage (Vo) is being measured accross resistor the relation between Input voltage (Vi) and Output voltage (Vo) will be Vo=Vi. When the we will represent it graphically we will get a straight line graph.

communications channel

It has to do with the load on the amplifier, you can't hear the difference.

A; By wearing a wrist strap connected to chassis and grounding the chassis to earth ground

There are just two binary digits, which are 0 and 1. "Binary digits" is often shortened down to "Bits". Putting binary digits together you can make up the codes that are used to store various characters from your keyboard.

For example the binary code for "A" is 01000001. In decimal that would be 65. For "a" the binary code 01100001, which is 97 in decimal. The letters, digits, punctuation symbols and other characters on your keyboard, as well as ones that don't appear on your keyboard, but would in other countries, all have binary codes. This is the way they are stored in your computer. It is possible to get some of these other characters by using the decimal equivalent of binary codes.

If you are using a PC, open up Notepad, which you should get through Programs and Accessories from your Start menu. On the right side of your keyboard is the numeric keypad. Make sure the num Lock light is on. Press and hold down the Alt key, which is on the left of your space bar. Keeping it held down, on the numeric keypad, not the numbers across the top of your keyboard, type 65 and then let go of Alt. You should get an A. Try it again with 97 and you will get a. Try any number between 0 and 255 and you will get various characters, including ones that are not on your own keyboard. These will include letters from other alphabets like é (130) or â (131), or symbols like the one used for temperature ° (248) and many others. apex.. chaos

Read this artical

http://www.picometrix.com/pico_products/an_band_terms.asp

biomedical based projects

because it is an universal gate that control and repairs other gates.

Capacitors store charge. The formula is Q=CV. They do not by themselves increase voltage or current.

If a capacitor is connected to a load, it can provide a large transient current in respond to sudden demand. It can only average out demand spikes, it cannot provide more current on average than is available from the supply.

In a circuit such as a power supply, a capacitor can store charge, and hence preserve an output voltage, during periods when the input voltage falls e.g. at zero-crossing of an AC supply.

It can also be used in a voltage-doubler or inverter circuit, possibly together with an inductor, to generate a high voltage from a low one. But it, by itself, does not increase voltage, it merely collects charge like a funnel collecting raindrops to provide a steady stream of water.

Electrikals...

Actually, the BJT is a positive temperature coefficient device. As they get warm, hFe increases, causing more current flow. This can lead to thermal runaway. That is why most class A common emitter configurations use an emitter resistor to place limits on the hFe demand, eliminating thermal drift and runaway.

On a differential amplifier while there is some voltage offset there is also current offset which is dependent on the value of the F/B resistance the bigger value the more offset.

If a DC series motor is started without load, the armature winding (winding that doesn't spin) current will be at a minimum, resulting in the motor going to maximum speed / runaway, which can cause things to fly apart. As Armature current increases, the speed of the motor will decrease. The armature current will be forced to increase / speed of the motor will be forced to decrease as more and more load is applied.

Quiet street

Normal conversation

refrigerator

50 - 60 electric toothbrush

50 - 75 washing machine

50 - 75 air conditioner

50 - 80 electric shaver

40-45-hotel, theater between performances

50-65-loud conversation

40 quiet office, library

50 large office

I don’t know