By Bertille Solange. Diagram. Publised at Thursday, August 03rd 2017, 15:32:42 PM. A block diagram shows a higher level (or organizational layout) of functional units in a circuit (or a device, machine, or collection of these). It is meant to show data flow or organization between separate units of function. A block diagram gives you an overview of the interconnected nature of circuit assemblies or components.
By Jessica Mireille. Diagram. Published at Tuesday, December 26th 2017, 14:23:35 PM. Circuit components are manufactured with exposed metal pins (or leads) that are used to fasten them to the PCB both mechanically (so they will not fall off) and electrically (so current can pass between them). The soldering process, which provides a strong mechanical bond and a very good electrical connection, is used to fasten components to the PCB. During soldering, component leads are inserted through the holes in the PCB, and then the component leads and the through-hole plating metal are heated to above the melting point of the solder (about 500 to 700 degrees F). Solder (a metallic compound) is then melted and allowed to flow in and around the component lead and pad. The solder quickly cools to form a strong bond between the component and the PCB. The process of associating components with reference designators, loading them into their respective holes, and then soldering them in place comprises the PCB assembly process.
By Alix Loane. Diagram. Published at Tuesday, December 26th 2017, 13:58:36 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.
By Alix Loane. Circuit. Published at Tuesday, December 26th 2017, 13:48:36 PM. The real part and imaginary part of impedance are interpreted as a resistive part that dissipates energy and a reactive part that stores energy. Resistors can only dissipate energy and therefore their impedances have only a real part. Capacitors and inductors can only store energy and therefore their impedances have only an imaginary part. When resistors, capacitors, and inductors are combined, the overall impedance may have both real and imaginary parts. It is important to note that the definition of impedance preserves the definition of resistance.
By Jessica Mireille. Diode. Published at Tuesday, December 26th 2017, 13:27:35 PM. When P and N type silicon are brought together during manufacture, a junction is created where the P type and N type materials meet, and holes close to the junction in the P type silicon are attracted into negatively charged N type material at the other side of the junction. Also, electrons close to the junction in the N type silicon are attracted into the positively charged P type silicon. Therefore along the junction between the P and N type silicon, a small natural potential is set up between the P and N semiconductor material with negatively charged electrons now on the P type side of the junction, and positively charged holes on the N side of the junction. This layer of opposite polarity charge carriers builds up until it is just sufficient to prevent the free movement of any further holes or electrons. Because of this natural electrical potential across the junction, a very thin layer has been formed between the P and N layers at the PN junction that is now depleted of charge carriers and so is called the Depletion Layer. When a diode is connected into a circuit therefore, no current can flow between anode and cathode until the anode is made more positive than the cathode by a forward potential or voltage(VF) at least sufficient to overcome the natural reverse potential of the junction. This value depends mainly on the materials the P and N layers of the diode are made from and the amount of doping used. Different types of diode have natural reverse potentials ranging from approximately 0.1V to 2 or 3V. Silicon PN junction diodes have a junction potential of about 0.6V to 0.7V
By Lydie Honorine. Power. Published at Tuesday, December 26th 2017, 13:24:59 PM. Another characteristic of any linear regulator is that it requires a finite amount of time to "correct" the output voltage after a change in load current demand. This "time lag" defines the characteristic called transient response, which is a measure of how fast the regulator returns to steady-state conditions after a load change.
By Madeleine Catherine. Amplifier. Published at Tuesday, December 26th 2017, 13:03:24 PM. So at this point we have the signal and power grounds connected. Next is the chassis. There are a number of ways that we can accomplish this connection. The key thought is to maintain the shock protection while using it as an EMI shield. Sometimes it can connect directly to the ground at the input jacks. This was a fairly common practice in the earlier days of electronic equipment. These were also in many cases what I would consider lower fidelity equipment and things that did not benefit from three wire AC mains. I do not recommend this as there is the possibility of introducing the EMI noise from the chassis and AC mains earth ground into the signal path. Most methods of making the connection involve resistors, capacitors or rectifiers. I suspect all will work. My preference is for a parallel combination of a metal film resistor of about 120 ohms (1/2 Watt is fine) and a type X2 capacitor in the range of 0.1 to 0.22uF. Type X2 capacitors are rated for use with AC mains circuits. I have seen ceramics and polys used there but since they are not usually AC mains rated I strongly recommend against them. The capacitor and resistor provide sufficient isolation between the chassis and circuitry to allow the chassis to be an effective EMI shield but not induce the EMI into the active circuitry.
By Jessica Mireille. Power. Published at Tuesday, December 26th 2017, 11:44:41 AM. In cases where thermal limiting occurs, both the output voltage and current will be reduced. When the output voltage drops below its nominal value, the error signal appearing at the voltage error amplifier will cause it to try and correct the regulator output voltage by driving its output high (and sourcing more current to the pass transistor).
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