By Jessica Mireille. Motor. Publised at Thursday, December 21st 2017, 11:37:52 AM. To avoid confusion obtain a pocket motor wiring guide and refer to it while performing the work. We mentioned a catch, earlier. With these and other motor wiring variations possible, it’s easy to make a mistake. That drawing we said to follow could be wrong. Before you connect any wires, check the drawing carefully. That’s another reason to have that pocket motor wiring guide.
By Charlotte Myriam. Motor. Publised at Monday, December 18th 2017, 14:50:43 PM. What if you don’t have drawings? What if the customer (the production department if you’re in maintenance) just wants a motor installed and the wiring is up to you? Your first task is to identify how many leads the motor has.
By Jessica Mireille. Circuit. Published at Wednesday, December 20th 2017, 15:20:13 PM. When a voltage is applied across a conductor, a current will begin to flow. The ratio between voltage and current is known as resistance. For most metallic conductors, the relationship between voltage and current is linear.
By Bertille Solange. Power. Published at Wednesday, December 20th 2017, 14:46:18 PM. This hierarchy means that a linear regulator will normally try to operate in "constant voltage" mode, where the voltage error amplifier is regulating the output voltage to a fixed value. However, this assumes that both the load current and junction temperature are below their limit threshold values.
By Madeleine Catherine. Diagram. Published at Wednesday, December 20th 2017, 14:45:40 PM. Now’s the fun stuff. Completing an electrical engineering degree and then getting a job in the field means you will see a lot a lot a lot of these schematics. It’s important to understand exactly what is going on with these. While they can (and will) get very complex, these are just a few of the common graphics to get your footing on.
By Lydie Honorine. Diagram. Published at Wednesday, December 20th 2017, 14:40:46 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 Bertille Solange. Amplifier. Published at Wednesday, December 20th 2017, 14:39:29 PM. First and probably the most important thing I learned is all grounds should not go directly to the chassis. This seems contrary to logic. A little side trip into electricity and conductors is appropriate now. Any conductor has some finite resistance and anytime some current is passed through it a voltage will be correspondingly created. Actually the voltage is first, but in this case we want to concentrate on the current. In a typical piece of audio equipment (most everything else as well) there are usually three distinct ground circuits. The first is obvious, the signal ground, the second is the power supply ground and third and often ignored is the case or chassis ground. Each has a particular function and all interact. The signal ground usual and primary function is to provide a return path for the audio. Likewise the power supply ground is the return path for the power used by the circuitry. The case ground I will cover a bit later. Remembering that anytime current flows through a conductor it will cause a voltage, let us see what happens if you mix the signal and power grounds. Each will generate a proportional corresponding voltage. So for an example: the conductor is a piece of wire that has a 1 ohm resistance, the signal voltage (and thus its return) has one millivolt (mV)of amplitude and the power supply is causing a flow of 100 milliamperes (mA) through the wire. The contribution to the voltages on the conductor is then, 1 mV for the signal and 0.1 Ampere times 1 ohm equals 100 mV for the power - see Ohm Law for equations. Since it is really unlikely that the power is perfectly clean DC it will contaminate the signal with hum and noise. Even a 1% noise level in the DC will result in a noise voltage equal to the signal voltage. I grant that this is a gross simplification, but it does illustrate the situation. So my rule number one is to absolutely avoid having any ground conductor handling both signal and power. So how do you do this? I find that a sort of modular arrangement is best. This does not mean that the physical components ca not be on the same board though. What it does mean is that the power supply is wired independently from the active signal portion. Eventually these grounds need to connect, but I will get to that later.
By Bertille Solange. Diagram. Published at Wednesday, December 20th 2017, 14:05:12 PM. Circuits often require inputs that come directly from users (as opposed to inputs that come from other devices). User-input devices can take many forms, among them keyboards (as on a PC), buttons (as on a calculator or telephone), rotary dials, switches and levers, etc. Digilent boards include several input devices, typically including push buttons and slide-switches. Since digital circuits operate with two voltage levels (LHV or Vdd, and LLV or GND), input devices like buttons and switches should be able to produce both of these voltages based on some user action.
By Alix Loane. Circuit. Published at Wednesday, December 20th 2017, 13:59:31 PM. Voltage is measured in units of Joules per Coulomb, known as a Volt (V). It is important to remember that voltage is not an absolute quantity, rather, it is always considered as a relative value between two points. In an electronic circuit, the electromagnetic problem of voltages at arbitrary points in space is typically simplified to voltages between nodes of circuit components such as resistors, capacitors, and transistors
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