PyLACC

Python Linear Analog Circuit Caclulator

API

from pylacc.circuit import *

Components

• Voltage Source:

  • E(E, F, **)

• Current Source:

  • I(I, F, **)

• Resistor:

  • R(R, F, **)

• Capacitor:

  • C(C, **)
  • XC(XC, **)

• Inductor:

  • L(L, **)
  • XL(XL, **)

• **

  • E Voltage (complex, phasor)
  • I Current (complex, phasor)
  • Z Impedence (complex, phasor) (alias R)
  • C Capacitance (positive, real)
  • L Inductance (positive, real)
  • XC Capacitive Reactance (positive, real)
  • XL Inductive Reactance (positive, real)
  • F Frequency (positive, real)
  • PT True Power (positive, real) (alias P)
  • PR Reactive Power (positive, real)
  • PA Apparent Power (positive, real)

• All names can be lower case for fast calculator input

• All arguments are optional

Complex Values

• 1.0 + 1.0j (complex)
• (radius, angle) (phasor, degrees)

Units

• k 10^3
• M 10^6
• G 10^9
• T 10^12
• m 10^-3
• u 10^-6
• n 10^-9
• p 10^-12

Series Circuits +

e(12) + r(100) + r(300)

+(12V 30mA)
+-S[12V](30mA 360mW)
+-R[100Ω](3V 30mA)
+-R[300Ω](9V 30mA)

Parallel Circuits /

e(12, 60) + xl(100) / xc(200) / r(300)

+(12V 72.1∠-56.3°mA)
+-S[12V 60Hz](72.1∠-56.3°mA 865mVA)
+-/(12V 72.1∠-56.3°mA)
+ /-L[100Ω](12V 120∠-90°mA 265mH)
+ /-C[200Ω](12V 60∠90°mA 13.3μF)
+ /-R[300Ω](12V 40mA)

Solving

.solve() recursively solves for all unknowns. Printing or representing a component / circuit implicitly triggers the solver.

Filtering

• _.z - Only show inferred impedence
• _.p - Only show inferred power
• _('e', 'z') - Custom output filter
• _('e,z') - Calculator shorthand

Grouping

Components can be grouped to prevent further concatenation.

FILTER = (l(1e-3) + c(0.0022e-6)).g
C = e(10, 107e3) + FILTER + r(100)
C.solve()
FILTER

+(380∠-87.8°mV 99.9∠2.18°mA)
+-L[1mH](67.2∠92.2°V 99.9∠2.18°mA 672Ω)
+-C[2.2nF](67.6∠-87.8°V 99.9∠2.18°mA 676Ω)

TODO

• Support multiple sources