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Unit 43: Current, voltage and resistance Dr. Basil Hamed Technical
Unit 43: Current, voltage and resistance Dr. Basil Hamed Technical

High-Side, Bidirectional Current Shunt Monitor
High-Side, Bidirectional Current Shunt Monitor

... This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete devi ...
EE 1000 Introduction to Electrical Engineering
EE 1000 Introduction to Electrical Engineering

... will provide. Most power supplies also have an internal meter to tell you the actual current and voltage they are producing. Experiment 1. Make sure the leads (wires from the power supply) are not touching and turn on the power supply. Adjust the voltage to 2.0 Volts. This can be done by setting the ...
Programmable Electronic Voltage Burden
Programmable Electronic Voltage Burden

FPA600 600W Thick Film Heatsink Resistors
FPA600 600W Thick Film Heatsink Resistors

... Whilst these parts are designed to operate in high frequency circuits, where dv/dt is faster than 250V/µS, it is recommended that the resistor is tested under worst case application conditions to ensure that unknown attribute of the application waveform are completely accounted for. ...
Pololu 3.3V Step-Up/Step-Down Voltage Regulator S7V8F3
Pololu 3.3V Step-Up/Step-Down Voltage Regulator S7V8F3

... available current decreases as the difference between the voltages increases; please see the graphs at the bottom of this page for a more detailed characterization. The regulator has shortcircuit protection, and thermal shutdown prevents damage from overheating; the board does not have reverse-volta ...
Bip Transistor 50V, 2A PNP MP
Bip Transistor 50V, 2A PNP MP

... Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpos ...
Resistor Networks
Resistor Networks

... the unknowns!. It is easier to use as unknowns V1 , V2 , i1 , i2 , i3 and i4 as we now explain. The first unknowns called V1 and V2 are the voltage increments across the current sources I1 and I2 (measured in the same direction as the arrows in the current sources). The other unknowns are some “arti ...
DN06018 - 12 V or 24 V DC, Constant Current LED Driver
DN06018 - 12 V or 24 V DC, Constant Current LED Driver

discharge of high voltage lines and capacitors banks
discharge of high voltage lines and capacitors banks

BP5048-15
BP5048-15

S10, S11, S12 Signal Input Modules Bitronics M87x
S10, S11, S12 Signal Input Modules Bitronics M87x

... The current signals are transformer coupled, providing a true differential current signal. Internal current signal wiring is designed to ensure CT circuit integrity. All voltage inputs are measured relative to a common reference level (ground). Calibration constants for variations in input cir ...
1.A 4.0 mH coil carries a current of 5.0 A. Find the energy stored in
1.A 4.0 mH coil carries a current of 5.0 A. Find the energy stored in

"Shoot from the hip" Electronic trouble
"Shoot from the hip" Electronic trouble

Thyristor-controlled power supplies and battery chargers
Thyristor-controlled power supplies and battery chargers

Click Here (.doc)
Click Here (.doc)

Title: Design Considerations for High Step
Title: Design Considerations for High Step

... Commercial power converters that have voltage ratios greater than ten and are capable of running near the LHC collision region would increase the efficiency of the power distribution system of the ATLAS Silicon Tracker high luminosity upgrade. The devices must operate in a high magnetic field (2 T) ...
Lec 12
Lec 12

... Project 3, and we can certainly decode each of the segments with NAND and NOR gates, but fortunately an integrated circuit (IC) is available that can decode all 7 segments at once. The part number for that IC is 74LS47. The 74LS47 takes a 4-bit binary number as input. (Since we have only 3 bits, we ...
I need to indicate flow pulse signals (10,000 pulses/hour) at two
I need to indicate flow pulse signals (10,000 pulses/hour) at two

... (2) Pulse Isolator (model KMT) It provides two isolated contact output signals. Input: mechanical contact, open collector Output: relay contact, open collector M-System has flexible solutions to meet your specific application and requirements. Consult our Signal ...
Automatic Street Light Control
Automatic Street Light Control

CAR INDUSTRY: safety system protects
CAR INDUSTRY: safety system protects

... protection is a direct earth connection on the output circuit. This safety measure has the significant disadvantage of reducing the quality of the welding due to the production of "shunt currents". A solution using a voltage-operated earth leakage protection system can avoid this disadvantage, howev ...
MC1488
MC1488

... The required driver voltages are defined as between 5 and 15V in magnitude and are positive for a logic "0" and negative for a logic "1". These voltages are so defined when the drivers are terminated with a 3000 to 7000Ω resistor. The MC1488 meets this voltage requirement by converting a DTL/TTL log ...
Circuit Note CN-0131
Circuit Note CN-0131

Electricity - MWMS HW Wiki
Electricity - MWMS HW Wiki

18electrical safty
18electrical safty

< 1 ... 1925 1926 1927 1928 1929 1930 1931 1932 1933 ... 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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