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SVG Circuit_macros examples, Version XXX

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This file shows diagrams in .svg format produced without the use of LaTeX or equivalent. The diagrams have been selected and adapted from the Circuit_macros examples in order to test the svg output of dpic.

Generating svg line art is straightforward but formatting text is not because TeX, LaTeX, and related word processors do not produce svg directly. Either less-sophisticated text formatting must be employed for svg or an intermediate format such as pdf can be produced, followed by an additional processing step to convert to svg. Two possibilities for the latter are dvisvgm and pdf2svg. However, many circuit and similar diagrams intended for the web do not require sophisticated labels; the examples shown below might be representative.

Click on the link to view the source of each diagram.

There are other issues:

  • The default font face is not specified in all of these diagrams but is inherited from the enclosing document, so the appearance of labels can differ depending on the browser. Some of these diagrams set the font at the beginning of the diagram source.
  • Diagrams such as these contain text labels that have to be treated differently from the LaTeX-compatible versions; for example, apparently there is no direct way to know the bounding box of arbitrary svg text. Consequently, text placement is approximate and may require manual adjustment.
  • Rather than patch the original source files for svg production, edited copies have been used. The configuration file svg.m4 read by m4 prior to libcct.m4 contains the following macros defined for svg. Others could be defined to exercise some of the media capabilties of svg. They are subject to change:
    • m4tt`'svg_font(font-face,nominal size[:dptextratio],textoffset, dpic commands`'m4tt): Change font face, size, textratio and dpic textoffset parameters. Change font face and dpic m4tt`'textht, m4tt`'dptextratio, and m4tt`'textoffset parameters. If arg4 is blank, the font is changed and requires m4tt`'command "</g>" at the end to cancel the font change.
      Note: Nominal height = text height in drawing units; actual height = nominal ht x m4tt`'dptextratio.
      m4tt`'svg_font(Times,11bp__,1bp__,"text" at A)
      m4tt`'svg_font(font-family="Times" font-style="italic")
      m4tt`'svg_font(style="font-family:Times; font-style:italic")
    • m4tt svgfontratio(font name`'m4tt); Reasonable m4tt`'dptextratio value for common fonts, used by m4tt`'svg_font.
    • m4tt svg_tspan(text attributes, text`'m4tt); e.g. m4tt`'svg_tspan(font-style="italic" font-size="75%",XYZ)
    • m4tt svg_it(text`'m4tt): for italics
    • m4tt svg_tt(text`'m4tt): for monospace (courier)
    • m4tt svg_sf(text`'m4tt): sans-serif (Helvetica)
    • m4tt svg_norm(text`'m4tt): for normal text
    • m4tt svg_bf(text`'m4tt): for bold face
    • m4tt svg_small(text, percent`'m4tt): to set a smaller text size, default 66
    • m4tt svg_fsize(text, percent`'m4tt): for setting larger or smaller text size, default 100
    • m4tt svg_sub(text, size percent, y displ, x displ`'m4tt): subscript
    • m4tt svg_ul(text`'m4tt): underlined text
    • m4tt svg_ol(text`'m4tt): overlined text
    • m4tt svg_sup(text, size percent, y displ, x displ`'m4tt): superscript
    • m4tt svg_hat(character`'m4tt): circumflex-accented character
    • m4tt svg_frac(numerator[:wid], denominator[:wid]`'m4tt): basic fraction, wid in drawing units
    • m4tt svg_rot(degrees, "text" [at position]`'m4tt): Rotate text degrees (default 90) ccw. Requires m4tt`'svg_rot_init(filename`'m4tt) and the source must be processed twice.
    • m4tt svg_rot_init(filename`'m4tt): filename is the basename of the output of m4tt`'dpic -v filename.pic > filename.svg`'m4tt
    • m4tt svg_symbol(text`'m4tt): allow quoted pound sign in text, e.g., m4tt`'svg_symbol(10&`#'176;) produces 10°
    • m4tt svgLink(URL, drawing object, m4tt[B]): link to external file using <a xlink:href=...>...</a> (default is m4tt`'target="_blank" unless arg 3 = B)
    • m4tt svgLinkString as above but for strings attached to objects
    • Greek and other symbols:
      m4tt svg_alpha changecom(,)&`#'945;changecom(`#') m4tt svg_beta changecom(,)&`#'946;changecom(`#') m4tt svg_Gamma changecom(,)&`#'915;changecom(`#') m4tt svg_gamma changecom(,)&`#'947;changecom(`#') m4tt svg_Delta changecom(,)&`#'916;changecom(`#') m4tt svg_delta changecom(,)&`#'948;changecom(`#') m4tt svg_epsilon changecom(,)&`#'949;changecom(`#') m4tt svg_zeta changecom(,)&`#'950;changecom(`#')
      m4tt svg_eta changecom(,)&`#'951;changecom(`#') m4tt svg_Theta changecom(,)&`#'920;changecom(`#') m4tt svg_theta changecom(,)&`#'952;changecom(`#') m4tt svg_iota changecom(,)&`#'953;changecom(`#') m4tt svg_kappa changecom(,)&`#'954;changecom(`#') m4tt svg_Lambda changecom(,)&`#'923;changecom(`#') m4tt svg_lambda changecom(,)&`#'955;changecom(`#') m4tt svg_mu changecom(,)&`#'956;changecom(`#')
      m4tt svg_nu changecom(,)&`#'957;changecom(`#') m4tt svg_Xi changecom(,)&`#'926;changecom(`#') m4tt svg_xi changecom(,)&`#'958;changecom(`#') m4tt svg_Pi changecom(,)&`#'928;changecom(`#') m4tt svg_pi changecom(,)&`#'960;changecom(`#') m4tt svg_rho changecom(,)&`#'961;changecom(`#') m4tt svg_Sigma changecom(,)&`#'931;changecom(`#') m4tt svg_sigma changecom(,)&`#'963;changecom(`#')
      m4tt svg_tau changecom(,)&`#'964;changecom(`#') m4tt svg_upsilon changecom(,)&`#'965;changecom(`#') m4tt svg_Phi changecom(,)&`#'934;changecom(`#') m4tt svg_phi changecom(,)&`#'966;changecom(`#') m4tt svg_chi changecom(,)&`#'967;changecom(`#') m4tt svg_Psi changecom(,)&`#'936;changecom(`#') m4tt svg_psi changecom(,)&`#'968;changecom(`#') m4tt svg_Omega changecom(,)&`#'937;changecom(`#')
      m4tt svg_omega changecom(,)&`#'969;changecom(`#') m4tt svg_micro changecom(,)&`#'956;changecom(`#') m4tt svg_ohm changecom(,)&`#'937;changecom(`#') m4tt svg_lt changecom(,)&`#'60;changecom(`#') m4tt svg_gt changecom(,)&`#'62;changecom(`#') m4tt svg_leq changecom(,)&`#'8804;changecom(`#') m4tt svg_geq changecom(,)&`#'8805;changecom(`#') m4tt svg_prime changecom(,)&`#'8242;changecom(`#')
      m4tt svg_backsl changecom(,)&`#'92;changecom(`#') m4tt svg_pound changecom(,)&`#'35;changecom(`#') m4tt svg_comma changecom(,)&`#'44;changecom(`#') m4tt svg_lparen changecom(,)&`#'40;changecom(`#') m4tt svg_rparen changecom(,)&`#'41;changecom(`#') m4tt svg_circ changecom(,)&`#'710;changecom(`#') m4tt svg_deg changecom(,)&`#'176;changecom(`#') m4tt svg_grave changecom(,)&`#'96;changecom(`#')
      m4tt svg_emsp |changecom(,)&`#'8195;changecom(`#')| m4tt svg_ensp |changecom(,)&`#'8194;changecom(`#')| m4tt svg_thinsp |changecom(,)&`#'8201;changecom(`#')|
  • Inkscape: It may be efficient to define elements by macro and to place them using a wysiwyg graphics editor. A draft page intended for Inkscape is included. A reasonable variety of elements is defined but many more could be added and they should be customized for particular applications. Adjustments may also have to be made to obtain the proper snap-to actions.
  • Link experiments: Click on the resistor or source of quickDPV to go to external files in new windows. Click on "n-port" in NportDPV to replace the diagram and then "back" to return.
  • Some of the assumptions used to create this draft may be na&`#'239;ve. Comments are welcome.

Fig. m4inx (quickDPV.m4): SVG produced by dpic changecom(,)&`#'8194;changecom(`#')

(quick.m4): SVG produced from quick.pdf by dvisvgm or pdf2svg changecom(,)&`#'8194;changecom(`#')

cfig(ResistorsDPV, Resistors`,' showing some variations and the ebox) cfig(CapacitorsDPV, Capacitors) cfig(InductorsDPV, Inductors) cfig(DiodesDPV, Diodes: appending a m4tt`'K to the second argument draws an open arrowhead) cfig(EmarrowsDPV, Radiation arrows) cfig(VariableDPV, Arrows and marks for showing variability) cfig(SourcesDPV, Sources and source-like elements) cfig(AmpTableDPV, Macros m4tt`'amp`,' delay`,' and m4tt`'integrator) cfig(FusesDPV, Macros m4tt`'fuse`,' m4tt`'cbreaker`,' and m4tt`'breaker) cfig(ArrestersDPV, The m4tt`'arrester macro) cfig(MoreTableDPV, Additional two-terminal elements) cfig(GroundsDPV, Ground symbols) cfig(SwitchesDPV, The switch macros; m4tt`'switch(`,'`,'`,'L|B|D,attribs) is a wrapper for m4tt`'lswitch`,' m4tt`'bswitch`,' and m4tt`'dswitch) cfig(AntennasDPV, Antenna symbols) cfig(OpampDPV, The opamp) cfig(AudioDPV, Audio elements) cfig(XformDPV, Some variations of the transformer element`,' drawing direction down) cfig(NPDTDPV, Double throw with the m4tt`'NPDT macro) cfig(ContactDPV, A non-exhaustive sampling of m4tt`'contact macro variations) cfig(ContactsDPV, The m4tt`'contacts macro) cfig(relaycoilDPV, The m4tt`'relaycoil macro) cfig(RelayDPV, Some variants of m4tt`'relay) cfig(JackDPV, The m4tt`'jack and m4tt`'plug macros) cfig(ConnDPV, The m4tt`'tstrip`,' ccoax`,' tconn`,' and m4tt`'tbox macros) cfig(PconnDPV, The m4tt`'pconnex macro) cfig(cbresistorDPV, Color-coded through-hole resistors) cfig(EVplugsDPV, Electric vehicle charging plug patterns make extensive use of key=value pairs to set options) cfig(HeadersDPV, The m4tt`'Header macro) cfig(ConnectorsDPV, Some integrated circuits and connectors with simple geometry and lists of labels) cfig(ChipsDPV, IC outlines) cfig(fetDPV, FETs`,' showing programmable components and example customizations) cfig(ujtDPV, UJT examples) cfig(thyristorDPV, Thyristor examples. The thyristor is a 3- or 4-terminal composite element) cfig(BipDPV, Bipolar transistors (drawing direction: up)) cfig(TgateDPV, The m4tt`'tgate and m4tt`'ptrans elements) cfig(NportDPV, The m4tt`'nport and m4tt`'nterm macros) cfig(NLGDPV, Some customizations of m4tt`'nport) cfig(WindingsDPV, The macro m4tt`'winding(L|R`,'diam`,'pitch`,'turns`,'core wid`,'core color)) cfig(Spec555DPV, A 555 timer example) cfig(ex01DPV, Two simple labeled circuits) cfig(ex02DPV, Elements at obtuse angles) cfig(OptoisoDPV, Optical isolator: a circuit with right or left orientation) cfig(MixerDPV, A balanced mixer`,' using m4tt`'mosfet and a custom transformer) cfig(PushPullDPV, A push-pull mixer`,' showing FETs with multiple gates) cfig(QuantumDPV, A quantum circuit) cfig(SixpoleDPV, A six-pole filter) cfig(ex18DPV, Precision half-wave rectifier and a tunnel diode circuit (illustrating m4tt`'opamp`,' diode`,' resistor`,' ground`,' and labels)) cfig(ex10DPV, Non-planar graph and bistable circuit (illustrating the m4tt`'crossover macro and colored elements)) cfig(ThreeDPV, Three-phase oscillator) cfig(MCDPV, A three-phase switched AC-AC converter and a DC-DC converter) cfig(ex12DPV, A CMOS NAND gate`,' a test circuit`,' and an XMOSFET example) cfig(pwrsupplyDPV, An elementary power supply circuit with colored elements`,' and a multiple-winding transformer with 3-phase rectifier) cfig(TTLnandDPV, TTL NAND gate illustrating a transistor with multiple emitters) cfig(I2LDPV, Gate circuit and equivalent embedded components illustrating multiple collectors) cfig(SchottkyDPV, A 4-input NAND circuit illustrating the m4tt`'S (Schottky) option of m4tt`'bi_trans) cfig(ex11DPV, Transistor radio audio chain) cfig(ex04DPV, Labels on non-manhattan elements) cfig(CsourceDPV, Realization of a controlled source (illustrating stacked element labels)) cfig(DriveDPV, Synchronous machine driven by variable-speed drive and rectifier) cfig(ex16DPV, A rate 1/2 binary convolutional coder and its state diagram) cfig(ex03DPV, Digital filter) cfig(MotorControlDPV, Motor control connections) cfig(RectifiersDPV, Rectifier circuits and waveforms) cfig(HeathkitDPV, The power supply of a Heathkit AR-15 (Now`,' that was a receiver!) with custom transformer and other elements`,' drawn on a grid (partially shown) to aid in placement) cfig(lcctDPV, A digital circuit of moderate size`,' redrawn from M. P. Maclenan and G. M. Burns`,' "An Approach to Drawing Circuit Diagrams for Text Books`,'" Tugboat (12)1`,' March 1991`,' pp. 66-69) cfig(TubediagsDPV, Electron-tube diagrams: a few bottom-view base diagrams`,' a generic triode test circuit`,' and a 25-watt audio amplifier adapted from F. Langford-Smith`,' Radiotron Designers Handbook`,' fourth edition`,' Harrison`,' NJ: Radio Corporation of America`,' 1952) cfig(UNODPV, An Arduino UNO circuit adapted and redrawn) cfig(sfgDPV, Signal-flow graphs) cfig(LogicDPV, Basic logic gates) cfig(ex08DPV, General-purpose latch: a small logic circuit) cfig(DecoderDPV, Decoder logic`,' constructed using the m4tt`'for_ macro) cfig(ex21DPV, Some flip-flops) cfig(MultiplexerDPV, Multiplexer) cfig(DemultiplexerDPV, Demultiplexer) cfig(ShiftRDPV, A 5-bit shift register drawn using a custom flip-flop) cfig(AdderDPV, A full adder and a cascade of n-bit adders) cfig(CanLogicDPV, A way of automatically drawing two-layer logic diagrams) cfig(AlogixDPV, The m4tt`'Autologix(`'Boolean expression; Boolean expression... `,' options) macro automatically draws Boolean expressions in function notation. The function tree is drawn`,' then a row or column of inputs`,' then the connections. The default result is on the left`,' a custom element at the top`,' and a tree of gates only is shown on the right.) cfig(ABlogixDPV, The m4tt`'Autologix macro can draw inputs on the left but the added drawing complexity may require hand tuning with second-argument options: m4tt`'L puts the inputs on the left`,' m4tt`'R reverses their order`,' m4tt`'V scans the input arguments in reverse order`,' and m4tt`'offset=`'value displaces the array of inputs) cfig(XORDPV, Realizations of the XOR function using m4tt`'Autologix) cfig(EEPDPV, Part of a single-line diagram of a power distribution system using draft elements) cfig(ex05DPV, Use of m4tt`'darrow and m4tt`'Darc) cfig(GrayCodeDPV, Gray code 10-bit encoder disk pattern`,' and a crossbar switch) cfig(controlDPV, Control-system block diagrams) cfig(SevensegmentDPV, A customizable seven-segment display showing the numbered segments with a custom shape and the numerals from 0 to 9) cfig(ByteDPV, Elementary splines) cfig(RotboxDPV, The macro m4tt`'rotbox(wid,ht,type,[r|t=val]) draws a box in the current direction) cfig(ex06DPV, Crosshatching) cfig(GeometryDPV, Plane geometry examples) cfig(LoglogDPV, Graphs drawn using the pic language) cfig(SmithchartDPV, A Smith chart) cfig(ex09DPV, Illustrating the macro m4tt`'dimension_(linespec`,' offset`,' label`,' H|W|D|blank width`,' tic offset`,' <-|->). A negative second argument implies an offset to the right of the linespec direction. A label starting with m4tt`'" or m4tt`'sprintf is copied literally. If label is an m4tt`'s_box(...) then setting argument 4 to m4tt`'H`,' m4tt`'W`,' or m4tt`'D tailors the blank width to the m4tt`'s_box height`,' width`,' or diagonal respectively; i.e.`,' m4tt`'W is equivalent to m4tt`'s_wd+textoffset*2. The macro m4tt`'arcdimension_ is similar but the first argument specifies the arc to be dimensioned and the second argument is the outward radial offset of the dimension arrow arc.) cfig(PlateDPV, Dimensioning with tolerances according to ASME Y14.5) Use of m4tt`'darrow and m4tt`'Darc) cfig(randomDPV, Testing random number generation using dpic macro m4tt`'randn(array name`,' mean`,' std devm4tt`') which calls dpic built-in m4tt`'rand()) cfig(expDPV, Test of m4tt`'project and other m4tt`'lib3D macros`,' showing the projection of a solid onto the y1`,'z1 plane by sighting along the x1 axis.) cfig(graysurfDPV, Plotting surfaces using gray scales) cfig(shapesDPV, Basic shapes) cfig(cscDPV, Conestoga Sailing Club (illustrating the filling of arbitrary shapes)`,' and an antique clock face with shading and rotated text) cfig(roseDPV, A window redrawn from a detail of the set design for the musical Dracula`,' used for testing m4tt`'dpic`,' and an experimental halftone. This diagram consumes much LaTeX main memory but can be produced directly as pdf using m4tt`'dpic -d`,' as svg using m4tt`'dpic -v`,' or as postscript using m4tt`'dpic -r since no text formatting is required) cfig(diamondDPV, Variations on M. Goossens`,' S. Rahtz`,' and F. Mittelbach`,' The LaTeX Graphics Companion`,' Addison-Wesley 1997`,' pp. 57-58) cfig(wormDPV, An exercise in calculating RGB colours) cfig(ButtonsDPV, Shading in color) cfig(keyboardDPV, More objects drawn in relief) cfig(DiniDPV, Dini surface`,' an icosahedron`,' and a sphere with inscribed cylinder) cfig(SierpinskiDPV, The Sierpinski triangle and a Cayley graph: tests of pic macro recursion) cfig(EscherDPV, Penrose stairs and an Escher-like object) cfig(recycleDPV, Modest repetition and partial fill) cfig(ex15DPV, Simple diagrams that are easily drawn by looping) cfig(CrowDPV, Illustrating m4tt`'shadebox and a custom crowfoot line termination) cfig(FlowDPV, A flowchart sampler) cfig(BtreeDPV, Trees) cfig(InclepsDPV, Overlaying a figure with line graphics,,OBJECT) cfig(paletteDPV, A draft palette of a few elements for Inkscape using a 1 mm grid) cfig(FontsDPV)