Electronics Engineering

Yes, Flip Wilson has 5 kids.

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Yes, there are formal classroom courses available in Oklahoma City about programmable logic controllers(PLC). You can enroll in Vatterott College which has an outstanding PLC program. They offer a variety of courses that teach Relay Operations, Understanding Ladder Logic, Understanding Schematics, Memory Organization of PLC, and many other crucial areas of knowledge to complete your PLC training.

There are so many things in life, you may put aside this question and look at others

accuracy with only one variable. Accuracy takes into account several different variables, only one of which is non-linearity. In other words, non-linearity alone does not determine a device’s overall accuracy.

These are the five variables a user should consider when determining pressure transmitter accuracy:

Two methods are used to generate the reference line needed to find a pressure transmitter’s non-linearity: the terminal method, also called endpoint method (blue line) and the best fit straight line method (brown line). The linearity is the largest deviation from the reference line to the actual response (red line).

1. Non-linearity

Non-linearity is the largest deviation between the actual response (red curve) and a reference line. There are two common methods for generating this reference line

The terminal method, also called the endpoint method, draws a straight line from the actual zero point to the actual full scale value endpoint. Since this method is based on the characteristic curve’s endpoints, it is a truer representation of a pressure transmitter’s non-linearity.

The best fit straight line (BFSL) method is a straight line that stays within a certain percentage deviation from the characteristic curve, or actual response. The endpoints do not figure into this method. BFSL method values are typically half of terminal method values, meaning that a pressure transmitter with a ±0.25% BFSL non-linearity allows for a ±0.50% error.

Zero offset and span tolerance when calculating pressure transmitter accuracy

2. Zero offset

The zero offset is the deviation between the ideal line’s zero point and the characteristic curve’s zero point (see Fig. 4).

3. Span tolerance

Span tolerance is the deviation of the actual span from the ideal span between the zero point and the full scale point. The span offset is not related to the zero offset and has to be added to it.

4. Hysteresis

Hysteresis is the lag between a change in pressure and the corresponding change in the pressure transmitter signal. It is an indication of how fast or slow a pressure transmitter responds to input changes.

5. Non-repeatability

Non-repeatability is the maximum difference in the signal of the pressure transmitter for the same applied pressure. It is an indication of how much the transmitter duplicates measurements for the same input.

A simple circuit has three resistors connected in series. The resistors are 14 ohms 12 ohms and 9 ohms. What is the total resistance of the circuit?

Answers.com says it is a microwave amplifier in which a Gunn oscillator functions as a negative-resistance amplifier when placed across the terminals of a microwave source.

absolute pressure;

gauge pressure;

atmospheric pressure...

Timing circuits, and any circuit that depends on the resistor value being fairly precise, such as voltage dividers and comparators. Old story....engineers knew that you couldn't pick through a bunch of loose precision resistors to find close tolerance resistors....The manufacurer already took the close precision resistors and sold them separately. This is not so true these days. Even low tolerance resistors might be high precision. Usually the manufacturer will fill the loose precision needs with parts better than required.

The controller of power 4376521 UEM Nokia 2310/2610/2626 UEMCLITE v3.0

If you actually mean rectifier (rather than regulator), then you can determine if it is performing its base function of converting alternating current to direct current by using a voltmeter. If the rectifier is functioning, you should read a percentage (which depends upon whether it is a half-wave or full-wave rectifier) of the AC peak input value on the DC range of a voltmeter. Using an oscilloscope, you can clearly view the half-wave or full-wave unidirectional (positive or negative only) pulses produced at the output of the rectifier. If the rectifier is blown and is conducting in both directions you will see nothing on a DC voltmeter range (the average value of an AC waveform is zero), and on an oscilloscope you will see the full peak-to-peak AC input waveform at its output.

characteristics if gunn diode

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advantages over what? Colpitts? Mostly the fact that it does not require a choke. A Hartley is more harmonic-rich than a Colpitts, so the main reason it is used lies in its (relative) ease of construction.

An LM1895N is a audio power amplifier chip. It is an 8W amp and can drive 4-ohm loads. The amp itself has 7 external connnections, but it comes in 8 pin DIP and 11 pin SIP packages.

The physical size of the resistor determines how much power(wattage), or heat can be dissipated. The larger the resistor the more power it can dissipate. Resistance is the opposition to current flow(electrons) and this opposition causes heat to be generated when current flows through it.

The AMOUNT of Heat dissipated per unit of time is measured in watts.

example if P=I X E (power formula)

P=Power(watts)

E=Voltage

I=Current

ohm's law-->E=I X R

say you are using a 1/2 w 100 ohm resistor and you put 12VDC thru the resistor to ground.

determine the current: I=E/R

I=12V/100 ohms

I=120 ma.

Plug in value into ohms law formula.

P=I X E

P=.120 x 12

P=1.44 watts (resistor will be dissipating 1.44 watts at 12v with 120 milli amps flowing thru it.

Resistors come in different wattage values( 1/8w, 1/4w, 1/2w, 1w etc) usually printed on them. So for this case you would need at least a 2 WATT resistor and still be safe and NOT BURN and destroy it to a crisp.

If the resistance has not changed then your resistor passed the required safe amount of current.

If the resistance has changed you may have burned the resistor with too much current and thus you have overpowered it.

You can also use a wattmeter and measure the wattage as voltage and current is applied to the resistor at a given resistance.

A Colpitts oscillator is the electrical dual of a Hartley oscillator. In the Colpitts circuit, two capacitors and one inductor determine the frequency of oscillation. The feedback needed for oscillation is taken from a voltage divider made by the two capacitors, where in the Hartley circuit the feedback is taken from a voltage divider made by two inductors (or a tapped single inductor). (Note: the capacitor can be a variable device by using a varactor). Oscillation frequency The ideal frequency of oscillation for the circuit is given by the equation: where the series combination of C1 and C2 creates the effective capacitance of the LC tank. Real circuits will oscillate at a slightly lower frequency due to junction capacitances of the transistor and possibly other stray capacitances

It seems to me that there are two methods. Reduce the supply voltage to the bridge, or reduce the time that the supply voltage is connected (you could also apply both methods simultaneously). Which is best depends on the details of the application. 1. Reducing the supply voltage: The power consumption of the bridge will be proportional to the square of the supply voltage so halving the voltage will quarter the power consumption. It will also halve the voltage at the detector for any given imbalance so, to maintain the same resolution, the sensitivity of the detector needs to be increased by the same factor as the voltage. Clearly there are limits to this as the imbalance signal will eventually be lost in noise. 2. Reducing the time the supply is connected: It is possible to pulse the supply voltage and the power consumption will be reduced in proportion to the duty factor. Clearly the detector must be fast enough to take a reading during the time that the supply is connected. This might be done using a microcontroller - an output controlling the supply to the bridge and an A/D input to measure the imbalance signal.

let us try.........

Various countries claim to have been the first to have invented it, and in the 1930s a number of countries were working on radar for military purposes. Robert Watson-Watts (1892-1973) is widely regarded as the inventor of a large-scale practical system, which he patented in April 1935 (British patent). He played a key role in setting up an early warning system, round Britain, of approaching enemy aircraft.

At the same time the British government also experimented with detection and ranging ('distancing') by heat from aircraft engines. However, it became obvious that detection by heat still needed many years of research and development, whereas radar didn't.

The basic idea of sending out a beam and picking up its 'reflection' or return is much older.

its a cycle of events in which information from one step controls or affects a previous step