Electronics

Advantage

1. Different waveform upto mhz freq. Can be generated

2. it can be used to generate square, sine, triangular and sawtooth waveforms

3. calibration is internal.

Disadvantage

They are usually not suitable for applications that need low distortion or stable frequency signals.

Electrical and Electronics engineering

Series resonant circuits have their lowest impedance at the resonant frequency. Parallel resonant circuits have their highest impedance at the resonant frequency. This characteristic is exploited in the design of filters, oscillators and other circuits.

A resistor reduces the flow of current between two terminals and thus reduces voltage. this is achieved through electrical resistance. All electrical conductors are resisters, some more resistant than others. The less resistance offered by a conductor, the easier it is for electricity to flow, thus the higher the current. Thus resisters allow circuit designers to control the flow of electricity.

A register is a small unit of storage used by a digital processor. Computers typically have a relatively large array of working memory, however all the actual processing is done via a small set of registers. Registers work in much the same way as main memory, typically using a capacitor and transistor pair to denote each bit, however registers are significantly faster. Some registers are used for housekeeping purposes such as to keep track of the next instruction and for marking the top of the program stack, while other are used to provide input and output for the current instruction. In order for an instruction to process a value that value must first be moved to a register, typically one of the accumulator registers. If the instruction requires another operand, it must be moved to another register, typically a user register. After processing, the accumulator's value is moved back to main memory, either by the instruction itself or by a subsequent instruction.

I think it is to determine how powerful you have to make your power supply to run the current demand load continously with a margin for error on the plus side. A 12 volt car battery has a low load resistance and needs some heafty components in a battery charger. A charger (or supply) for a 12 volt boom box with a high load resistance may be the size of a small paper cup. They both supply 12-15 volts but the load resistance is very much different E=IR I=E/r R=E/i

it conducts in only one direction. it can also be used as a switch and made to not conduct at all.

In a typical radio receiver, there will be, a tuning stage, several IF stages, followed by an audio amplifier. (And a few other ancillary bits we'll ignore here.)

The signal from the aerial could be a microvolt or less, and the voltage required at the audio stage will be a few volts. It is not absolutely essential that any of the amplification take place in the tuning stage. Most of the amplification will take place in the Intermediate Frequency stages, and a little more in the audio stages.

Ballast is purely a coil simply inductor that controls the current supplied to the tube. Of which there will be some loss and drop in power factor. Yet it is a good system which can handle the voltage fluctuations in the input. An electronic choke has 2 diode bridges and 2 major capacitors, by which the voltage and current supplied are controlled. The circuit operates in three stages. Voltage boosting is good and immediate, also eliminates starter. But this creates harmonics in the system which may disturb other systems if produced in large and it also cant handle the fluctuations.

Electric device means a device which works by using electric power or current and it's working principle or working area is shown whoever sees it. Where as electronic device means it can work by consuming electric power or battery power, but we can not see the working principle , i.e , how it is working ,and just we see the result. Electronic devices are preprogrammed and it consists of chips (which are small pieces, encapsulation of programs.

sir,please tell us about microcontroller 8951 program for robotic car

there are several ways of safety hazards in electronic circuits those are those are -

1- capacitors are dangerous if they charged discharge it before handling.

2- the high voltages are present somewhere in electronic circuits like EHT on television mind these.

3> static charge of body can damage cmos ics don't touch them from naked hand.

4> ground all equipments before using them it will prevent from electric shock.

Thevenin's theorem is a basic equivalence principle for circuit design. It can simplify a very complex circuit to a very simple equivalent. This is done by finding the Thevenin Resistance as well as the Thevenin voltage and current. Once these are known, the equivalent circuit is simply a voltage source in series with a resistance.

• The galvanometer is an instrument for detecting electric current.
• It is an analog electromechanical actuator that produces a rotary deflection of some type of pointer in response to electric current flowing through its coil in a magnetic field.
• Galvanometers were first used to detect and measure electric currents.
• Sensitive galvanometers were used to detect signals from long submarine cables, and were used to discover the electrical activity of the heart and brain.

Supervisory Control and Data Acquisition.

Audio means that it is audible, in other words, that humans are capable of hearing, whereas sound extends beyond the human ear capabilities, like ultrasound which is higher pitched than what our ears can hear.

no indeterminate state

a number of kit-type electronic devices such as radio transmitter sets- like one by GE If I remember correctly, were marketed in transparent cases, so on display all the major components of the set- tubes, transistors, capacitors, relays, etc would be clearly visible and usually a circuit diagram was printed on the breadboard of the assembly- do not confuse with printed circuits- this is more like a map or assembly diagram. They were clearly angled at the youth and especially the Science-Fair market.

The operating point of a device, also known as bias point or quiescent point (or simply Q-point), is the DC voltage and/or current which, when applied to a device, causes it to operate in a certain desired fashion. The term is normally used in connection with devices such as transistors and diodes which are used in amplification or rectification.

Few points

1. If used on bed without any hard flat surface under the laptop, primarily you should be concerned about heat the laptop generates. With insufficient cooling, the laptop may shutdown when it gets overheated.

2. You may also sleep while using the laptop and may drop the laptop on the floor and damage it.

3. If you eat and drink while using laptop on bed, chances are more that you may spil some thing on the machine.

4. If you have no other option but to use the machine on bed, make sure you use some large wooden board or any large hard book under the machine to allow for air circulation under the laptop.

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It's OK to use your laptop on the bed if you have something underneath it. For example, a book underneath your laptop will do good. The reason for this is, the heat produced by the laptop is really hot, and when there is nothing shielding the sheets ( they are highly flammable), it might catch on fire.

IMPORTANT: Do not put your laptop on your lap because:

1. If you're a guy, you have a high risk of catching prostate cancer.

2. If you're a female/girl, you have a high risk of catching any other form of cancer.

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Well, i think the main reason is, the laptop cooling fan. Actually mostly laptops has cooling fans on it's base. Fan takes the air from it, and if it is on bed, then no air gets in the laptop. So it becomes hot. This is the main reason manufacturers suggests not to use laptops on bed.

That's it.

Use a hammer and gloves.

The flashlight products currently on the market, non-professional diving flashlights, generally mid-to-high-end brands such as Fenix, Olight, and CYANSKY, etc., all have IPX8 waterproof function, which means that the flashlight can still work underwater within a depth of 2 meters. Some flashlights will be IPX7 waterproof, which means that they can still work underwater within a depth of 1 meter. You can check whether the flashlight has the function of IPX8 waterproof when purchasing a flashlight.

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