Electronics: "Parallel Resistive Circuits: Bridges" US Air Force Training Film TVK30-101R by Jeff Quitney
Electronics: "Parallel Resistive Circuits: Bridges" US Air Force Training Film TVK30-101R by Jeff Quitney
https://ift.tt/2DHoBXA
"TRAINING FILM ON ELECTRICITY. IN THIS EPISODE: PARALLEL RESISTIVE CIRCUITS - BRIDGES. TVK 30-101R" Produced on video at Keesler Air Force Base. US Air Force Training Film TVK30-101R Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). https://ift.tt/2xLy3Ui Wikipedia license: https://ift.tt/gc84jZ A bridge circuit is a type of electrical circuit in which two circuit branches (usually in parallel with each other) are "bridged" by a third branch connected between the first two branches at some intermediate point along them. The bridge was originally developed for laboratory measurement purposes and one of the intermediate bridging points is often adjustable when so used. Bridge circuits now find many applications, both linear and non-linear, including in instrumentation, filtering and power conversion. The best-known bridge circuit, the Wheatstone bridge, was invented by Samuel Hunter Christie and popularized by Charles Wheatstone, and is used for measuring resistance. It is constructed from four resistors, two of known values R1 and R3, one whose resistance is to be determined Rx, and one which is variable and calibrated R2. Two opposite vertices are connected to a source of electric current, such as a battery, and a galvanometer is connected across the other two vertices. The variable resistor is adjusted until the galvanometer reads zero. It is then known that the ratio between the variable resistor and its neighbour is equal to the ratio between the unknown resistor and its neighbour, which enables the value of the unknown resistor to be calculated. The Wheatstone bridge has also been generalised to measure impedance in AC circuits, and to measure resistance, inductance, capacitance, and dissipation factor separately. Various arrangements are known as the Wien bridge, Maxwell bridge and Heaviside bridge[3]. All are based on the same principle, which is to compare the output of two potentiometers sharing a common source. In power supply design, a bridge circuit or bridge rectifier is an arrangement of diodes or similar devices used to rectify an electric current, i.e. to convert it from an unknown or alternating polarity to a direct current of known polarity. In some motor controllers, a H-bridge is used to control the direction the motor turns.
Uploaded 2018-09-30T02:15:20.000Z
https://ift.tt/2DHoBXA
"TRAINING FILM ON ELECTRICITY. IN THIS EPISODE: PARALLEL RESISTIVE CIRCUITS - BRIDGES. TVK 30-101R" Produced on video at Keesler Air Force Base. US Air Force Training Film TVK30-101R Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). https://ift.tt/2xLy3Ui Wikipedia license: https://ift.tt/gc84jZ A bridge circuit is a type of electrical circuit in which two circuit branches (usually in parallel with each other) are "bridged" by a third branch connected between the first two branches at some intermediate point along them. The bridge was originally developed for laboratory measurement purposes and one of the intermediate bridging points is often adjustable when so used. Bridge circuits now find many applications, both linear and non-linear, including in instrumentation, filtering and power conversion. The best-known bridge circuit, the Wheatstone bridge, was invented by Samuel Hunter Christie and popularized by Charles Wheatstone, and is used for measuring resistance. It is constructed from four resistors, two of known values R1 and R3, one whose resistance is to be determined Rx, and one which is variable and calibrated R2. Two opposite vertices are connected to a source of electric current, such as a battery, and a galvanometer is connected across the other two vertices. The variable resistor is adjusted until the galvanometer reads zero. It is then known that the ratio between the variable resistor and its neighbour is equal to the ratio between the unknown resistor and its neighbour, which enables the value of the unknown resistor to be calculated. The Wheatstone bridge has also been generalised to measure impedance in AC circuits, and to measure resistance, inductance, capacitance, and dissipation factor separately. Various arrangements are known as the Wien bridge, Maxwell bridge and Heaviside bridge[3]. All are based on the same principle, which is to compare the output of two potentiometers sharing a common source. In power supply design, a bridge circuit or bridge rectifier is an arrangement of diodes or similar devices used to rectify an electric current, i.e. to convert it from an unknown or alternating polarity to a direct current of known polarity. In some motor controllers, a H-bridge is used to control the direction the motor turns.
Uploaded 2018-09-30T02:15:20.000Z
Comments
Post a Comment