• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Variable Voltage Controller
Variable Voltage Controller

... voltage regulator. This regulator is packaged in a TO-220 case and is rated at 3-amps. Since the LD1085V regulator is fully current limited and thermally protected, no fuse is used. And at the full 3-amp current limit, this device only needs a 1.2-volt input/output differential voltage, meaning that ...
Chapter 8 - High Voltage Surge Generators
Chapter 8 - High Voltage Surge Generators

... In the uncontrolled operation, the break down voltage of the sphere gap is less than the peak value of the supply, so that it effectively closes when the voltage across the gap builds up above its breakdown value. The capacitor would then discharge through the impulse generator circuit producing an ...
AC GUI Stand Alone
AC GUI Stand Alone

... • The slip value to be entered here should be the slip giving optimum efficiency for the given target rotor frequency and motor characteristics. The PI will adjust the stator voltage and frequency according to this slip frequency, the target frequency and the V/F curve. ...
DRSSTC BUILDING THE MODERN DAY TESLA COIL FIRST EDITION
DRSSTC BUILDING THE MODERN DAY TESLA COIL FIRST EDITION

... About 100 years ago, Nikola Tesla invented the first Tesla coil. Since that time, amateur scientists and students from around the world have been duplicating and improving on his first experiments in the quest for larger and more spectacular arcs. And although there were many advancements and improv ...
MAX7058 315MHz/390MHz Dual-Frequency ASK Transmitter General Description
MAX7058 315MHz/390MHz Dual-Frequency ASK Transmitter General Description

... 26 can be selected, and a 15MHz crystal is used as the reference for 315MHz/390MHz operation. The FSEL pin is used to select the divide ratio. The MAX7058 can operate over a 300MHz to 450MHz range by using different crystal frequencies. The two operating frequencies are always related by a 26:21 rat ...
Document
Document

Power Supply - 123SeminarsOnly.com
Power Supply - 123SeminarsOnly.com

... with the regulator's voltage. For maximum voltage regulation, adding a capacitor in parallel between the common leg and the output is usually recommended. Typically a 0.1MF capacitor is used. This eliminates any high frequency AC voltage that could otherwise combine with the output voltage. See belo ...
Intro_Elec 2010
Intro_Elec 2010

App Note 505 - Charging Units as Continuous DC Supplies
App Note 505 - Charging Units as Continuous DC Supplies

... Capacitor charging power supplies are designed and rated such that they are actually capable of delivering greater than 2 x their average output power for durations of a few milliseconds, and under certain output conditions. If a standard capacitor charging supply is operated in the continuous DC mo ...
FX Series - Glassman High Voltage
FX Series - Glassman High Voltage

Lab5_Introduction
Lab5_Introduction

... software and hardware. Here is what we will do:  Create a square wave or a sine wave in MATLAB  Send the signal out through the DAQ as a voltage signal applied across the RC circuit  We will also use the DAQ as a voltmeter to measure the voltage across the capacitor  The DAQ will send these meas ...
10 Transient analysis using spice
10 Transient analysis using spice

... Create a Blank project. If you drag the scroll down, you may see a ground already present with some explanation written underneath, you can use this ground or delete and add it later from parts list. ...
HW15 - University of St. Thomas
HW15 - University of St. Thomas

... instant described in part (a). (ideal) c) Compute the voltages across the resistor and across the capacitor just after the switch is thrown from position 1 to position 2. 980 Ω d) Compute the charge on the capacitor 10.0 ms after the switch is thrown from position 1 to position 2. ...
Physics 202 - La Salle University
Physics 202 - La Salle University

... exclude voltages for which the current is zero and perhaps even the first couple voltages with non-zero currents.) Calculate the resistance for a low voltage and a high voltage. Voltage used ...
Features - Gigatech Products
Features - Gigatech Products

ALL Warranties are subject to change, always verify.
ALL Warranties are subject to change, always verify.

Transmitters-3
Transmitters-3

high voltage power supply design and manufacturing
high voltage power supply design and manufacturing

... There are special requirements in packaging HV power supplies for space use. The power processor should be voltage-partitioned and the low voltage circuits should be separated from the high voltage circuits. This is usually done with a metal wall. There still will be signals transmitted between the ...
Mounting instructions for the `123ignition` STEP 1: Find the static
Mounting instructions for the `123ignition` STEP 1: Find the static

IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) ISSN: 2278-1676

EUP6514 5V/12V Synchronous Buck PWM Controller
EUP6514 5V/12V Synchronous Buck PWM Controller

... between BOOT pin and the PHASE pin. The bootstrap capacitor provides the charge to turn on the upper MOSFET. Upper gate driver output. Connect to the gate of high-side power N-Channel MOSEFT. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET ...
Inductive Load Arc Suppression
Inductive Load Arc Suppression

... peak voltage (VRMS * 1.414) and Isw is the rated switching current of the reed switch or sensor. A lower R decreases the contact wear from arcing. A higher R decreases the contact wear from the capacitive inrush current. To select an appropriate capacitor value, start with C = 0.1 μF (100 nF) as thi ...
t - ECE, Rutgers - Rutgers University
t - ECE, Rutgers - Rutgers University

... Integration and Differentiation 4.3.1 Integration of a square wave: Choose a frequency at which you are satisfied with the performance of the circuit as an integrator (adjust sensitivity and sweep rate as needed). Measure the peak to peak capacitor voltage VCPP and the frequency of the waveform usin ...
Charge Sharing by Capacitors
Charge Sharing by Capacitors

... Thus, we may determine the value of an "unknown" capacitor C1 in terms of a "known" capacitor C2 and measured voltages V1, V2 and V'. In circuit #2, in section IV, we have two capacitors and a power supply connected in series. Circuit #3 is used for charging and reading voltages of the capacitors of ...
Basic concepts and laws of electronics
Basic concepts and laws of electronics

...  The analysis and design of AM radios (and communication systems in general) is usually conducted in the frequency domain using Fourier analysis, which allows us to represent signals as combinations of sinusoids (sines and cosines). ...
< 1 ... 282 283 284 285 286 287 288 289 290 ... 367 >

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.""
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report