Electronics Engineering

Multiplexing is the ability of a number of devices to share a transmission facility.If each device needs the facility only a fraction of time,then the sharing arrangement allows the cost of the facility to be spread over many users.

post by Mohammed Alkhattab

quote from William Stallings book

The voltage divider circuit is a network of two or more components in series, often resistors, between a potential difference. The voltage between the components will be somewhere between the potential difference across the whole network and so divides the total voltage into one or more intermediate voltages.

The unit for electrical current is the ampere.

One key advantage of parallel circuits over series circuits is that they allow multiple components to operate independently. In a parallel circuit, if one component fails, the others continue to function, whereas in a series circuit, a failure in one component disrupts the entire circuit. This makes parallel circuits more reliable for applications where uninterrupted operation is essential, such as in household wiring. Additionally, parallel circuits can provide consistent voltage across all components, enhancing performance.

it creates a dc current

When you connect a load (motor, light bulb, etc.) in series with a power supply, current will flow, whether AC or DC depends on the power supply you are using.

In an electrical circuit, electicity moves from the positive (+) end of the power source to the negative (-) end.

The Seminar topics in Instrumentation and Control Engineering could be many,

since Instrumentation itself is a very vast field.

Owing to this I tried to dialogue a little in here:

1) Transducers and Sensors.

2) Electronics measurements and Instrumentation.

3) Micro controllers and Microprocessors.

4) Signal and Sytems( Z, Nyquist t/f, Bode plots, Laplace t/f with/out Convolutions)

5) Control systems.

6) Process control and Actuators.

7) Bio Medical Instrumentation( EEG,EMG,ECG,MRI and X-ray)

Cadmium Sulphide (CdS), Cadmium Selenide (CdSe), Selenium, etc.

It is an oxidation/reduction reaction. Electrons flow from anode to cathode.

A capacitor voltage transformer (CVT) is a transformer used in power systems to step down extra high voltage signals and provide a low voltage signal, for measurement or to operate a protective relay. Inductive voltage transformers use conventional magnetic material for coupling of HV and LV circuit. This method has problems due to insulation of EHV circuit to the magnetic core( usually at ground potential) and very expensive to produce as it may need a few step down stages to achieve to final voltage ratio, each stage shall be floated at gradually reducedvoltage relative to ground potential.

rain, pollination by insects, and the breakdown of soil by earthworm, and sunrays etc

A 0.1 ohm resistor is color coded brown (1) black(0) silver (x 10-2).

Use thicker wire. Doubling the diameter gives one quarter the resistance.

Without understanding the basic ideal components you cannot hope to begin to understand the models used for real components nor can you hope to understand the circuits these components are used in.

It is kinda like having to learn the alphabet before learning to read or write. Learn the parts before learning how they work together.

Since voltage is electrical potential difference, to measure the voltage across a component, you place the voltmeter across, or in parallel with, the component.

Capacitors are circuit devices for storing electric energy. Variable capacitors are mainly used in filter circuits and power supplies. They are used in a variety of appliances.

It's the same formula as resistors in parallel:

C = C1xC2/(C1+C2)

C= 20 x 50 / 70 = 14.3 uF.

Yes you can do it. more voltage is good, a little more capacitance is good. Be sure to use a good quality capacitor.

Note: on the old capacitor, it might be stated the temperature ratings such as 85 deg. C, 105 deg C, etc. Observe this as well. Higher is better.

An ideal zener diode will have zero reverse current while the reverse voltage is less than the zener voltage. Once the voltage rises above the zener voltage, the maximum reverse current will become infinite (the device will become a short). On a graph with voltage along the X axis and current along the Y axis, this would be represented by a straight vertical line crossing through the zener voltage.

A practical zener diode has a monotonic change from zero current at zero volts, rising gradually as the voltage approaches the zener voltage from below, then rising sharply as the voltage is around the zener voltage. This means that with reverse voltage applied even slightly below the zener voltage there will be some current flow. This can be a problem in some circuits if not understood and accounted for.

We're assuming that the question refers to a speed radar gun, and not to

a Doppler weather radar, FAA air-route surveillance radar, or military radar.

Get a microwave source that runs on 13 volts and radiates at 10.525 GHz.

Connect it to your car's electrical system and mount it behind the front grill.

Speed radars will not be able to get a reading from the front, and they'll be

effectively jammed. The operator will stop you to see what you've got going.

Hopefully, he'll ticket you for interfering with local traffic regulation, and then

send your ID to the FCC, who will fine you for operating an unlicensed RF

transmitting source. And that's how you do it.

its like c programming on pic microcontroller...

[EDIT 7/31/2012]

Well, it is not really the same as programming C. C is compiled and runs on the metal and Java is interpreted and runs in a sandbox. Completely different. The answer to the question is yes, you can. JwiK™ is an open source Java VM for 8 bit microcontrollers and is designed to work on micros without a decent stack: ie. 8051 and PIC.

You can convert Analog slides to digital slides using either a flat bed scanner, hand scanner, projector copier, Transparent scanner (either professional or consumer) or in worst case scenario take a digital photo of the slide.