By Charlotte Myriam. Motor. Publised at Monday, December 18th 2017, 14:50:43 PM. In the previous section it was shown that motor torque varies inversely with speed. This then is the motor’s natural speed-torque curve. Below a certain speed, called the corner speed, current would rise above the motor’s rated current, ultimately to destructive levels as the motor’s speed is reduced further.
By Jessica Mireille. Motor. Publised at Thursday, December 21st 2017, 11:37:52 AM. A step motor is a constant output power transducer, where power is defined as torque multiplied by speed. This means motor torque is the inverse of motor speed. To help understand why a step motor’s power is independent of speed, we need to construct (figuratively) an ideal step motor.
By Valentine Sybille. Diagram. Published at Monday, December 18th 2017, 17:16:29 PM. A digital circuit requires a power supply to provide a constant and stable source of electric power to all devices. As discussed above, electric power is derived from the basic electrical forces that charged particles (e.g., protons and electrons) exert on one another – namely, electrons are repelled by other electrons, and attracted to more electrically positive areas where there are relatively fewer electrons. The vast majority of charged particles are found in ordinary matter bound in electrically neutral atomic structures (that is, most particles are found in structures that have an equal number of positive and negative particles). Some electrically neutral conducting materials (like metals) contain electrons that are not so tightly bound to their host atoms. If a voltage source is applied to these materials, the lightly bound electrons will move away from the concentrated source of electrons on the negative side of the supply towards the electrically positive side of the supply. A “power supply” in a digital circuit provides a local, contained imbalance of electrons that provides a voltage source that can do useful work, such as transmitting information through a conductor from one device to another. A digital circuit allows a controlled flow of electrons from of the negative to positive side of the power supply, but only via the paths designed into the circuit. As electrons flow to and from the devices in a given circuit, they can change device properties in useful ways.
By Lydie Honorine. Diagram. Published at Monday, December 18th 2017, 16:26:21 PM. If there’s something on a schematic that just doesn’t make sense, try finding a datasheet for the most important component. Usually the component doing the most work on a circuit is an integrated circuit, like a microcontroller or sensor. These are usually the largest component, oft-located at the center of the schematic.
By Charlotte Myriam. Circuit. Published at Monday, December 18th 2017, 16:04:32 PM. First let’s understand the difference between these two terms. While electrical is the basis of everything, electronic is a subset of electrical. An electrical circuit deals with just the flow of electrons and has components like resistors, inductors and capacitors and uses Alternating Current Source; while electronic circuit deals with the transformation of current and controlling the motion of the electrons and uses Direct Current Source. An electrical circuit is termed as Passive because it doesn’t have any such component that reacts to the current/voltage that passes through them and electronic circuit is called active because of the additional components like diode or a transformer that react to the current/voltage that passes through.
By Madeleine Catherine. Diagram. Published at Monday, December 18th 2017, 16:02:01 PM. There are drawing programs, and there are schematic capture programs. All schematic capture programs will produce output for inclusion in publications. However, these programs have different goals, and it shows. Rarely is the output of a schematic capture program really suitable for publication; often it is not even readable, or cannot be scaled. Engineers who really want to have a useful schematic drawing of a circuit usually redraw the circuit in a general drawing program, which can be both tedious and prone to introducing new errors.
By Valentine Sybille. Diagram. Published at Monday, December 18th 2017, 15:33:56 PM. Inductors are usually represented by either a series of curved bumps, or loopy coils. International symbols may just define an inductor as a filled-in rectangle.
By Jessica Mireille. Diode. Published at Monday, December 18th 2017, 15:23:06 PM. If you apply a negative voltage to a diode, so the −-−cathode terminal is higher voltage than the +++anode terminal, this puts us on the left side of the iii-vvv curve. We say the diode is reverse biased. In the reverse direction, the current is very close to zero, just ever so slightly negative.
By Bertille Solange. Diagram. Published at Monday, December 18th 2017, 15:14:40 PM. In addition to reading this instructable it may be a good idea for you to read my other instructable "electronics components and what they do" to get a good understanding of what you are doing when building a project.
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