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Circuit diagrams
rpic ships a native library of 79 circuit elements —
a from-scratch re-imagining of J. D. Aplevich’s celebrated
circuit_macros, written in pure pic (no m4). Load it with
circuits = TRUE, or from inside the source with
copy "circuits"; both are equivalent:
library(rpic)
rpic_svg('A:(0,0); B:(2,0)
resistor(A,B)', circuits = TRUE)
rpic_svg('copy "circuits"
A:(0,0); B:(2,0)
resistor(A,B)')
All figures below were pre-rendered with the code shown.
Two-terminal elements
resistor, capacitor, inductor,
battery, diode, led,
fuse, sources, meters… — each draws between two named
points, connecting wire included. A classic RLC loop:
rpic_svg('
SW:(0,0); NW:(0,1.2); NE:(2.4,1.2); SE:(2.4,0)
battery(SW,NW); resistor(NW,NE); capacitor(NE,SE); inductor(SE,SW)
dot at NW; dot at NE; dot at SE; dot at SW
', circuits = TRUE)
a rectangular circuit loop: battery on the left,
resistor on top, capacitor on the right, inductor on the bottom, with
junction dots
Labels — with TeX math
Circuit figures traditionally carry math labels; combine the library
with texlabels:
rpic_svg('
A:(0,0); B:(1.4,0); C:(2.8,0)
resistor(A,B); "$R_1$" at 0.5 between A and B + (0, 0.35)
diode(B,C); "$D_1$" at 0.5 between B and C + (0, 0.35)
', circuits = TRUE, texlabels = TRUE)
a resistor labelled R1 and a diode labelled D1
in series
Logic gates
Gates take a center point and export their terminals as variables
(gA_x/gA_y, gB_…,
gY_…):
rpic_svg('
P:(0.5,0); and_gate(P)
Q:(1.9,0); nand_gate(Q)
R:(3.3,0); xor_gate(R)
"AND" at (0.5,-0.55); "NAND" at (1.9,-0.55); "XOR" at (3.3,-0.55)
', circuits = TRUE)
AND, NAND and XOR gate symbols side by
side
Multi-terminal devices
Transistors and op-amps also export their terminals as variables
(gBase_*, gColl_*, gEmit_*), so
wiring attaches precisely:
rpic_svg('
npn((0,0))
line left 0.3 from (gBase_x, gBase_y); "B" rjust at last line.end - (0.04, 0)
line up 0.25 from (gColl_x, gColl_y); "C" above at last line.end
line down 0.25 from (gEmit_x, gEmit_y); "E" below at last line.end
', circuits = TRUE)
an NPN transistor symbol with wires and labels
on the base, collector and emitter
In R Markdown / Quarto
Register the knitr engine once and write pic directly in chunks, with
circuits (and texlabels, scale)
as chunk options:
```{r, eval = FALSE}
rpic::rpic_register_knitr()
```
```{rpic, circuits=TRUE, scale=2}
A:(0,0); B:(2,0)
resistor(A,B)
```
The full element list lives in the library
source; a gallery of 48 circuit_macros figures rendered by the same
engine is in the engine
repository.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.