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IOSR Journal of Applied Physics (IOSR-JAP) ISSN: 2278-4861.
IOSR Journal of Applied Physics (IOSR-JAP) ISSN: 2278-4861.

RHA_VSC_PEN_PIR - Industrial Controls Knowledge Base
RHA_VSC_PEN_PIR - Industrial Controls Knowledge Base

Document
Document

p21xxcsr-evb
p21xxcsr-evb

... It should be noted that changing R1 or R2 will change the voltage set by switch S1. Care should be taken to ensure the absolute maximum voltage is not exceeded. Selecting DSET S2 is used to select how DSET and DOUT function on the board. Selecting OFF will allow the P21XXCSREVB to operate normally. ...
The TESLA coil - Tesla Coil Design, Construction and Operation Guide
The TESLA coil - Tesla Coil Design, Construction and Operation Guide

... Nikola Tesla was born the 10th of July 1856 in a Serbian village of the Austrian Empire (in today’s Croatia) and died the 7th of January 1943 in the United States [1]. It is not an exaggeration to say he was a visionary who changed the world. With his works on alternative current, including many pat ...
Frequency Foldback Current Mode PWM
Frequency Foldback Current Mode PWM

... CT), have time intervals that are set by external resistors at ION and IOFF. The operating frequency is inversely proportional to the timing capacitor. The negative sloped portion of the oscillator waveform is extended in time as the measured output voltage decreases providing protection during outp ...
The Rotating Magnetic Field Oscillator System for
The Rotating Magnetic Field Oscillator System for

... To simplify the discussion of the experimental system, unless stated otherwise, the following discussion applies to one tank circuit (i.e. one antenna system which contains two antennas). A 1:1 transformer electrically isolates the current source from the tank circuit. On the primary side of the tra ...
Evaluates: MAX1637 MAX1637 Evaluation Kit General Description ____________________________Features
Evaluates: MAX1637 MAX1637 Evaluation Kit General Description ____________________________Features

rm6 technical specification
rm6 technical specification

... The RM6 is a “totally SF6” switchgear range with built-in functions and reduced dimensions. This compact and self-contained totally insulated unit constitutes the MV component of the branching point of a MV network (Network points). It includes, within the same metal enclosure, the number of MV func ...
RMS Voltage For a driving voltage of the form or a current of the form
RMS Voltage For a driving voltage of the form or a current of the form

... across an inductor leads the current by 90 degrees”? ...
LTC1046 - Inductorless 5V to -5V Converter
LTC1046 - Inductorless 5V to -5V Converter

... logic gate is best because it can operate over a wide supply voltage range (3V to 15V) and has enough voltage swing to drive the internal Schmitt trigger shown in Figure 5. For 5V applications, a TTL logic gate can be used by simply adding an external pull-up resistor (see Figure 6). Capacitor Selec ...
17404 Sample Test Paper-I
17404 Sample Test Paper-I

M045037985
M045037985

Substation Tranisents and Solid State Controls
Substation Tranisents and Solid State Controls

... this can also produce transient potentials of several thousand volts at the sending end of the cable. These transients from both sources are transmitted by the cable and the station ground to various control and protective equipments. Exposure to this type of transient can be reduced if the size of ...
MAX1472 300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter General Description
MAX1472 300MHz-to-450MHz Low-Power, Crystal-Based ASK Transmitter General Description

Lab 3 – Finding the value of an unknown capacitor By Henry Lin
Lab 3 – Finding the value of an unknown capacitor By Henry Lin

... sine wave with a voltage amplitude of a nice round number like 3V. You may want to adjust your frequency later, but start at about 1 Hz. Use a resistor of around 10000 ohms. ...
Basic Concepts
Basic Concepts

... inductor. Unlike resistors, which can only dissipate energy, these two elements can only store energy, which can then be retrieved at a later time. ...
Basic Electrical Engineering Laboratory
Basic Electrical Engineering Laboratory

... 6. Planck’s constant determination set-up with LED’s of different wavelengths. 7. Planck’s constant determination set-up using solar cell, on an optical bench AR coated filters in filter wheel. 8. Hall Effect experimental set-up: Complete in all respect with electromagnet, digital power supply, and ...
CS5171BSTEVB CS5171/3 3.3 V to 5.0 V/ 400 mA Boost Regulator
CS5171BSTEVB CS5171/3 3.3 V to 5.0 V/ 400 mA Boost Regulator

... When the VCC voltage is below the minimum supply voltage, the VSW pin is in high impedance. Therefore, current conducts directly from the input power source to the output through the inductor and diode. Once VCC reaches approximately 1.5 V, the internal power switch briefly turns on. This is a part ...
Introduction to Basic Electronic Components. Test and Measurement
Introduction to Basic Electronic Components. Test and Measurement

... and blue colours respectively. Led’s come in a special transparent casing as shown in fig 8..Dual colour led’s are also available where two junctions are encapsulated on the same chip. It has three leads where cathode is common whereas normal leds’ have two leads one for cathode and other for anode. ...
University of North Carolina, Charlotte Department of Electrical and Computer Engineering
University of North Carolina, Charlotte Department of Electrical and Computer Engineering

ECE 206L - ecelabs
ECE 206L - ecelabs

... Using the formula above we get: • 2 * pi * f * L • where: 2 * pi = 6.2832; f = 7 X 10+6 Hz and L = 6.8 X -6 Henries • Answer: = 299 ohms • What reactance does a 33 pF capacitor present at 7 Mhz? Using the formula above we get: • 1 / (2 * pi * f * C) • where: 2 * pi = 6.2832; f = 7 X 10+6 Hz and C = ...
Assignemnts
Assignemnts

... 8. Calculate active and reactive power if V=100+j200V, I=10+j5A, Ans:2000W, 1500VAr 9. A resistance R=10Ω and inductive reactance XL=5Ω are connected in series across 100V, 50Hz supply. Find Z, I, pf, P, Q, apparent power and complex power. Z=10+j5Ω (11.8Ω, angle 26.560) I=8-j4A Pf=0.894 lag P=800W, ...
Full Text - ISSN: 1545
Full Text - ISSN: 1545

Tone Decoder
Tone Decoder

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Spark-gap transmitter



A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""
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