Editing 730: Circuit Diagram

Another fine example of [[356|nerd sniping]], as mentioned in the title text.

{{circuit-diagram-part|X=19|Y=25|W=106|H=37|image=circuit_diagram-019-025-106-037-scale.png|text=A map scale. Lists kilometers and miles as equivalent. (And makes the diagram many miles wide.)}}

{{circuit-diagram-part|X=15|Y=62|W=40|H=85|image=circuit_diagram-015-062-040-085-antenna.png|text=An antenna. Typical of radio receivers or transmitters. Or the Turtle in {{w|Logo (programming language)|LOGO programming language}}.}}

{{circuit-diagram-part|X=53|Y=60|W=41|H=87|image=circuit_diagram-053-060-041-087-inductor.png|text=A coil or {{w|inductor}}. Normal, but unlabeled.}}

{{circuit-diagram-part|X=107|Y=86|W=85|H=93|image=circuit_diagram-107-086-085-093-cloverleaf.png|text=A {{w|cloverleaf interchange}} or junction is a feature of road networks that does not belong in a circuit diagram. Of course, other types of {{w|p–n junction|junctions}} are important in electronics.  

A cloverleaf junction has previously been used in comic: [[253: Highway Engineer Pranks]].}}

{{circuit-diagram-part|X=184|Y=12|W=87|H=63|image=circuit_diagram-184-012-087-063-battery.png|text=A battery. The voltage of square root of two is strange, but getting about 1.41412... volts is not unheard of. This could also indicate an {{w|Root_mean_square|RMS}} voltage, although this is unlikely given that this is a DC power supply and not an AC generator. The marked polarity is also the reverse of what is implied by the symbol (where the larger terminal is positive). A possible reference to [[567: Urgent Mission]].}}

{{circuit-diagram-part|X=187|Y=110|W=94|H=71|image=circuit_diagram-187-110-094-071-resister.png|text=A 120 ohm {{w|resistor}} is normal enough. "Or to taste" is odd for a circuit diagram and more like instructions from a recipe, e.g., "1 tbsp tomato purée, or to taste".}}

{{circuit-diagram-part|X=283|Y=50|W=90|H=63|image=circuit_diagram-283-050-090-063-switch.png|text=A normal {{w|switch}}, with a notation to glue it open. Reminiscent of the [http://catb.org/esr/jargon/html/magic-story.html MAGIC/MORE MAGIC] switch.}}

{{circuit-diagram-part|X=337|Y=101|W=69|H=64|image=circuit_diagram-337-101-069-064-transisitor.png|text=A {{w|Bipolar_junction_transistor#PNP|bipolar PNP transistor}}, except that it has two emitters and no collector. It also resembles one of the schematic symbols for a {{w|DIAC}}, except the arrows are backwards.}}

{{circuit-diagram-part|X=52|Y=141|W=79|H=107|image=circuit_diagram-052-141-079-107-compass-points.png|text=Compass points. A map feature, not a circuit feature, but possibly useful given the circuit is many miles wide.}}

{{circuit-diagram-part|X=415|Y=18|W=63|H=58|image=circuit_diagram-415-018-063-058-resister.png|text=A normal resistor, labeled with color code. Brown-Blue-Orange would be 16000 ohms. {{w|Electronic color code|Resistor color codes}} are for reading the value on the physical device itself. They would not normally be shown on the circuit diagram, where it's much easier to just write the number, e.g. 16K.}}

{{circuit-diagram-part|X=517|Y=14|W=42|H=32|image=circuit_diagram-517-014-042-032-diode.png|text=A normal {{w|diode}}.}}

{{circuit-diagram-part|X=650|Y=211|W=75|H=71|image=circuit_diagram-650-211-075-071-squirrel.png|text=A squirrel, or perhaps a wire bent into the shape of a squirrel. {{w|Electrical disruptions caused by squirrels|Squirrels are among the leading causes of disruptions to electrical grids,}} so having one as part of a circuit is inviting disaster. [[:Category:Squirrels|Squirrels]] also appear in past and future xkcd comics.}}

{{circuit-diagram-part|X=606|Y=165|W=54|H=53|image=circuit_diagram-606-165-054-053-inductor.png|text=A coil or inductor.  An inductor in an AC circuit is analogous to a mass in an oscillating mechanical system; rather than listing the coil's inductance, the measurement of an analogous mechanical element is given: 11 kilograms of mass.}}

{{circuit-diagram-part|X=483|Y=186|W=111|H=103|image=circuit_diagram-483-186-111-103-shorted-generator.png|text=A shorting wire around a generator. The label reads "Omit this if you're a <u>wimp</u>." If this wire is included, it will quickly melt - or worse.

Theoretically, wimps will omit the wire, and people who know this fact will also, so it would be fine.}}

{{circuit-diagram-part|X=419|Y=78|W=57|H=75|image=circuit_diagram-419-078-057-075-scarab-beetles.png|text=A jar of {{w|Scarabaeidae|scarab beetles}}. Possibly a conflation of a {{w|Leyden jar}}, that is an actual very old-style electrical/electronic component, and something like a {{w|killing jar}} or other {{w|Insect trap|insect-collection equipment}}. Or even, due to the traditionally Egyptian beetles, a repurposed {{w|canopic jar}}.}}

{{circuit-diagram-part|X=482|Y=47|W=28|H=44|image=circuit_diagram-482-047-028-044-variable-resister.png|text=A {{w|variable resistor}} with center tap. Normally, there would be an arrowhead on the center tap.}}

{{circuit-diagram-part|X=507|Y=53|W=22|H=27|image=circuit_diagram-507-053-022-027-capacitor.png|text=A normal {{w|capacitor}}.}}

{{circuit-diagram-part|X=577|Y=318|W=96|H=62|image=circuit_diagram-577-318-096-062-magic.png|text="{{w|Magic Smoke}}" is the legendary stuff that all circuit components require to function. This is why all components cease to function after releasing smoke. When an electrical component is subject to excessive current it often fails due to heat. This heat is often accompanied by a burning smell and smoke, right at the moment that the circuit fails. Hence the joke that the reason that the circuit failed is that "the magic smoke that makes it work has been released." }}

{{circuit-diagram-part|X=669|Y=315|W=51|H=66|image=circuit_diagram-669-315-051-066-frayed-wires.png|text=Some frayed or dangling wires. The wire on the left seems confused because it did not manage to cross with the one on the right.}}

{{circuit-diagram-part|X=567|Y=392|W=58|H=48|image=circuit_diagram-567-392-058-048-buoy.png|text=An object which is either a {{w|Fishing float|float}} used in fishing, a {{w|Tippe top}}, or perhaps a {{w|Naval mine|mine}}.}}

{{circuit-diagram-part|X=423|Y=259|W=80|H=85|image=circuit_diagram-423-259-080-085-warm-front.png|text=This resembles both the schematic symbol for part of a {{w|transformer}} and the meteorological symbol for a warm front.  A {{w|warm front}} is a feature on a {{w|Surface weather analysis|synoptic weather map}}.}}

{{circuit-diagram-part|X=141|Y=211|W=41|H=91|image=circuit_diagram-141-211-041-091-3-8-inch.png|text=A specified 3/8-inch separation. This probably indicates a carefully controlled capacitance issue. Also contradicts the scale of the drawing, by which the distance shown would be about 0.8 miles or 0.8 km. Or both.}}

{{circuit-diagram-part|X=65|Y=249|W=61|H=92|image=circuit_diagram-065-249-061-092-blender.png|text=Our best guess is that this is a {{w|blender}}. Due to the scale, this would certainly be the worlds largest blender.  Record setting blenders are not typically part of computer circuits{{Citation needed}}}}

{{circuit-diagram-part|X=20|Y=342|W=115|H=73|image=circuit_diagram-020-342-115-073-arduino.png|text=An {{w|arduino}}, labeled "Arduino, just for blog cred". May refer to the fact that inexpensive, easy-to-integrate single-board computers like the arduino, which have contributed to the rise of {{w|Maker culture}}, are used and discussed frequently in that culture, and the use of one might impress readers.  The comment implies that an arduino is not otherwise needed in this circuit, although it is necessarily hard to tell, given the other components of the circuit.}}

{{circuit-diagram-part|X=147|Y=480|W=110|H=88|image=circuit_diagram-147-480-110-088-switch.png|text=A switch labeled "Hire someone to open and close switch real fast." Possibly meant to perform the function of an {{w|Electronic oscillator|oscillator}} in a more hackish manner and the reason for the neck strap. Could also be a reference to {{w|Maxwell's Demon}}.}}

{{circuit-diagram-part|X=294|Y=311|W=128|H=124|image=circuit_diagram-294-311-128-124-IC.png|text=A small integrated circuit. The lower gate is an {{w|Inverter (logic gate)|inverter}}, wired as a free-running oscillator. The upper gate is an {{w|XOR gate|XOR}} wired to act as either a free-running oscillator or a latch. Since the XOR will be slower than the inverter, the overall output of the upper gate is probably very chaotic. Two "input" wires are not connected at all. An additional wire is attached to the top with hot glue. This last wire probably acts to control static electricity and leakage.}}

{{circuit-diagram-part|X=472|Y=49|W=134|H=140|image=circuit_diagram-472-049-134-140-solderr-blob.png|text=A {{w|Soldering#Soldering_defects|solder blob}} covering a portion of the circuit. Normally, this would not be part of the circuit diagram, but a mistake in building the circuit.}}

{{circuit-diagram-part|X=493|Y=443|W=207|H=158|image=circuit_diagram-493-443-207-158-res-rats-nest.png|text=A rat's nest of 1 ohm resistors. It is labeled "Oh, so you think you're such a whiz at EE201?" The name EE201 (Electrical Engineering 201) follows US course naming conventions for what appears to be a basic level course in electrical engineering (compare the term {{w|101 (term)|101}}), which would include being taught how to [http://www.wikihow.com/Calculate-Series-and-Parallel-Resistance calculate the effective resistance of various resistor networks]. Performing the calculation on a network this complex would probably be very difficult. Experimentally, the resistance of the mass can be measured as, likely coincidentally, about π/4.

{{circuit-diagram-part|X=315|Y=533|W=232|H=200|image=circuit_diagram-362-531-151-167-arena.png|text=An {{w|arena}}, with a few bodies in it. Note the direction of movement enforced by the surrounding diodes, {{w|Mad_Max_Beyond_Thunderdome|"two men enter, one man leaves"}}, a film reference.}}

{{circuit-diagram-part|X=481|Y=682|W=85|H=64|image=circuit_diagram-481-682-085-064-ground.png|text=A ground connection, labeled "Bury deep, but not too deep". This type of ground connection is called an "earth ground" The "too deep" part might be a reference to {{w|Moria (Middle-earth)|Moria}} in Lord of Rings. The dwarves dug too deeply and disturbed a Balrog. See also comic [[760]].}}

{{circuit-diagram-part|X=102|Y=590|W=93|H=88|image=circuit_diagram-102-590-093-088-fluxcapacitor.png|text=The {{w|DeLorean time machine#Flux capacitor|flux capacitor}} from {{w|Back to the Future}}.  This may be difficult to implement, since flux capacitors are not available to most people,{{Citation needed}} and connecting one to power may cause time travel or time distortions in the local area.}}

{{circuit-diagram-part|X=138|Y=685|W=54|H=24|image=circuit_diagram-138-685-054-024-I95.png|text=A road sign for "I-95". {{w|Interstate 95}} is the main north-south highway on the east coast of the United States, running from Maine to Florida.}}

{{circuit-diagram-part|X=12|Y=713|W=134|H=36|image=circuit_diagram-012-713-134-036-tothesun.png|text=A connection labeled "To center of Sun". A 93-million-mile or 150-million-km circuit is rather large.{{Citation needed}}}}

{{circuit-diagram-part|X=197|Y=740|W=48|H=55|image=circuit_diagram-197-740-048-055-speed.png|text=A sign indicating a speed limit of 55 MPH. This is a rather typical road sign, but inappropriate for a circuit diagram. It is presumably referring to the speed of individual electrons, which can normally vary up to almost the speed of light - although based on the width of the wire and assuming about 1A of current, the ''average'' speed of all electrons, the drift velocity, is likely to be in the order of 10^-17mph.}}

{{circuit-diagram-part|X=238|Y=706|W=100|H=116|image=circuit_diagram-238-706-100-116-flipflop.png|text=A pair of {{w|NOR gate}}s wired as a SR (set-reset) {{w|Flip-flop (electronics)|flip-flop}}. The label reads "May use an actual sandal instead", which is a play on the meanings of the term "{{w|Flip-flops|flip-flop}}". Also,the gate looks like a sandal.}}

{{circuit-diagram-part|X=339|Y=777|W=42|H=49|image=circuit_diagram-339-777-042-049-knot.png|text=A simple {{w|overhand knot}}. Also looks like a pretzel, which would have pretty high resistance.}}

{{circuit-diagram-part|X=191|Y=889|W=149|H=33|image=circuit_diagram-191-889-149-033-ecg.png|text=This appears to be an {{w|Electrocardiography|electrocardiograph}} (ECG) trace, but not the sort that would be seen in a healthy person. If this were a real ECG trace, the absence of large, clear {{w|P wave (electrocardiography)|P waves}} might indicate {{w|Atrial Fibrillation|fine atrial fibrillation}}, but in some recording configurations, P waves are sometimes lost in the noise anyway. Additionally, without a time scale to tell us the ventricular heart rate, it is impossible to make a strong educated diagnosis of any hypothetical disease at all. If we assume it is atrial fibrillation, it is not clear if Randall intended this, or if he is just not familiar with how a normal ECG should look. Lastly, we should throw all of these findings out of the window, as it does not appear that this is an actual ECG machine, but simply a bent wire, much like the "Not a resistor" label nearby.}}

{{circuit-diagram-part|X=223|Y=826|W=82|H=68|image=circuit_diagram-223-826-082-068-photodiode.png|text=A {{w|photodiode}}, labeled "Tear Collector". A photodiode is a light-sensing device.}}

{{circuit-diagram-part|X=537|Y=847|W=120|H=72|image=circuit_diagram-537-847-120-072-inductor.png|text=A coil or inductor, labeled "Take off shirt while wiring this part. Ooh, yeah, I like that." Stripping while wiring plays on the more mundane action of stripping a wire.}}

{{circuit-diagram-part|X=459|Y=828|W=55|H=38|image=circuit_diagram-459-828-055-038-resistor.png|text=A resistor labeled "YES". Likely another improper unit - a reference to boolean values YES (TRUE) and NO (FALSE). Depending on the limits of a circuit, a resistor would still have a YES boolean value. Possibly indicating that this is a real resistor, as opposed to the one above it in the circuit, labeled "not a resistor." This may also be a reference to the question: "How much INSERT OBJECT HERE do you want?, Yes."}}

{{circuit-diagram-part|X=389|Y=774|W=58|H=53|image=circuit_diagram-389-774-058-053-resistor.png|text=A resistor labeled "8 mm". Resistance is measured in ohms, and while it might be useful to specify the dimensions of a component to be used (usually on an actual assembly template, or other written documentation, rather than upon a connectivity diagram) the lack of required resistance rating/acceptable range adds far more doubt.}}

:An unlabeled resistor with a center tap.

:An AC source that is labeled 240V, shorted out, with a label on the short "Omit this if you're a wimp."  

This is one of the six [[Footer comics|footer comics]] featured in the bottom segment of [https://xkcd.com xkcd.com].