By Cyrielle Marjolaine. Diagram. Publised at Sunday, November 19th 2017, 23:35:54 PM. Voltage nodes are single-terminal schematic components, which we can connect component terminals to in order to assign them to a specific voltage level. These are a special application of net names, meaning all terminals connected to a like-named voltage node are connected together.
By Sasha Sara. Amplifier. Published at Tuesday, December 19th 2017, 02:01:05 AM. The power amplifier works on the basic principle of converting the DC power drawn from the power supply into an AC voltage signal delivered to the load. Although the amplification is high the efficiency of the conversion from the DC power supply input to the AC voltage signal output is usually poor.
By Madeleine Catherine. Diagram. Published at Tuesday, December 19th 2017, 01:28:27 AM. 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 Madeleine Catherine. Diode. Published at Tuesday, December 19th 2017, 01:03:57 AM. 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 Jessica Mireille. Motor. Published at Tuesday, December 19th 2017, 00:50:09 AM. Ideally, you will be connecting motors per an installation drawing. In that case, it’s a matter of correctly identifying the motor leads by number and connecting them per the drawing. Don’t try to “wing it” when replacing a motor, working with OEM equipment, or installing a motor when such drawings have been provided. But there’s a catch. We’ll get to that in a moment.
By Jessica Mireille. Diagram. Published at Tuesday, December 19th 2017, 00:43:41 AM. The unloaded PCB appears green because thin sheets of green plastic have been applied to both sides (otherwise the PCB would appear pale yellow). Called solder masks, these sheets cover all exposed metal other than the component pads and holes so that errant solder can not inadvertently short (or electrically connect) the printed wires. All metal surfaces other than the exposed pads and holes (i.e., the wires) are underneath the solder mask. Not infrequently, blue or even red solder masks are used.
By Jessica Mireille. Diagram. Published at Tuesday, December 19th 2017, 00:40:08 AM. Sometimes, to make schematics more legible, we’ll give a net a name and label it, rather than routing a wire all over the schematic. Nets with the same name are assumed to be connected, even though there isn’t a visible wire connecting them. Names can either be written directly on top of the net, or they can be “tags”, hanging off the wire.
By Cyrielle Marjolaine. Circuit. Published at Tuesday, December 19th 2017, 00:33:07 AM. Impedance essentially can be viewed as frequency-dependent resistance. While resistance of a circuit is the instantaneous ratio between voltage and current, impedance of a circuit is the ratio between voltage and current for steady-state sinusoidal signals, which can vary with of frequency. As the later parts of this section will show, the voltage and current caused by applying a steady-state sinusoidal signal to any combination of resistors, capacitors, and inductors, are related by a constant factor and a phase shift. Therefore, impedance can be expressed by a complex constant using an extended version Ohm’s law.
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