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Tutorial-2 (Week-5)
Tutorial-2 (Week-5)

... R3 is adjusted so that the voltmeter reads 0V (i.e. the bridge is "balanced"), at this point R3 = 2000Ω. Given this information state the value of Rx Answer = R2xR3/R1 = 4000Ω ...
Voltage, Current, Resistance and Ohm’s Law
Voltage, Current, Resistance and Ohm’s Law

... Use a DMM to measure the resistance of a 1 M resistor, while holding one resistor lead in the fingers of your left hand and the other resistor lead in the fingers of your right hand. Repeat the measurement in a way that gets your body out of the circuit. Do you find a difference? Would you expect t ...
Rectifier filter capacitors
Rectifier filter capacitors

Functions of Electrical Transformer
Functions of Electrical Transformer

DATASHEET: Furman AR-1220
DATASHEET: Furman AR-1220

Chapter 19 Review Current and Resistance
Chapter 19 Review Current and Resistance

LT6108/LT6109 - Current Sense System
LT6108/LT6109 - Current Sense System

... Precise, Rugged and Fast Current Monitor and Control Linear Technology’s LT ®6108 and LT6109 are complete high side current sense devices that combine a high precision current sense amplifier with comparators and a precision voltage reference. When connected to a current shunt resistor, the high sid ...
Report on Industrial Visit to 230/110 Kv Singaperumalkoil
Report on Industrial Visit to 230/110 Kv Singaperumalkoil

ESMT/EMP
ESMT/EMP

... The AD22653 is a 2-Vrms cap-less stereo line driver. The device is ideal for single supply electronics. Cap-less design can eliminate output dc-blocking capacitors for better low frequency response and save cost. The AD22653 is capable of delivering 2-Vrms output into a 10kΩ load with 3.3V supply. T ...
Suntan® Su® DB101-THRU
Suntan® Su® DB101-THRU

... SINGLE-PHASE GLASS PASSIVATED SILICON SURFACE MOUNT BRIDGE RECTIFIER REVERSE VOLTAGE 50 to 1000 Volts FORWARD CURRENT 1.0 Ampere RATING AND CHARACTERISTIC CURVES DB101 THRU DB107 ...
Variable Resistors - La Favre home page
Variable Resistors - La Favre home page

model vd-500a capacitive voltage divider
model vd-500a capacitive voltage divider

... calibration is for use in oil, which has a dielectric constant of about 2.3. If the unit is used in air, its division ratio will be approximately 23000:1, but if this is the intended use, a factory calibration of 10000:1 in air would be more accurate and desirable. The maximum pulse voltage rating f ...
HV Testing 1200V High Side Driver Application – Lessons Learned
HV Testing 1200V High Side Driver Application – Lessons Learned

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80VIN/80VOUT, Constant Voltage, Constant
80VIN/80VOUT, Constant Voltage, Constant

... optimizing efficiency while minimizing external component size and cost. Combined with a 5mm x 6mm QFN package, the LT3956 offers a highly compact 25 Watt LED driver solution. The LT3956 uses True Color PWM™ dimming, delivering constant LED color with dimming ranges up to 3,000:1. For less demanding ...
PHYS 210 Electronic Circuits and Feedback These notes give a
PHYS 210 Electronic Circuits and Feedback These notes give a

... The circuit consists of the following main parts: Thermistor glued to a power resistor. The thermistor is a temperature sensor whose resistance drops very quickly with increasing temperature. It is based on an undopped semiconductor. At room temperature the resistance is about 10 kΩ and it drops abo ...
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wide voltage pulse width DC motor speed control, speed control board

... The latest product of the HX-PWM (extra-wide voltage AC90V-AC260V) enter low-power DC motor speed controller. The governor uses pulse width modulation technology, selection of today's advanced switching device design, small size, no noise, high efficiency work, and advanced short circuit protection, ...
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... ‐ Only copper resistance limits current in a stationary motor.  ‐ Power must be added in a controlled way to protect the system.  ‐ Other courses go more into detail on this.  ...
Exercise 7 – Differential amplifier
Exercise 7 – Differential amplifier

Analog Voltage and Current Output Scaling
Analog Voltage and Current Output Scaling

... Series controllers offer analog voltage and current Output with an accuracy of 0.1%. Voltage output requires no calibration, but current output is influenced by the load resistance and requires an offset adjustment to reach stated accuracy when the output is operating in retransmission mode. ...
v - Center for Energy Efficient Electronics Science
v - Center for Energy Efficient Electronics Science

Electromotive Force
Electromotive Force

... energy that is supplied by the EMF is used by the devices in the circuit. Kirchoff’s Loop Rule: For any closed loop around the circuit the total of the potential rises is equal to the potential drops. The current through a resistor is in the direction of a potential drop since the resistor dissipate ...
TDA8172 - PS electronic, sro
TDA8172 - PS electronic, sro

... Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implicatio ...
Sensors - UCLA IEEE Micromouse
Sensors - UCLA IEEE Micromouse

... How sharp of an angle the LED emits light at ...
Types of Circuits
Types of Circuits

hw3
hw3

< 1 ... 2148 2149 2150 2151 2152 2153 2154 2155 2156 ... 2207 >

Resistive opto-isolator



Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.
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