Project Files of Film Capacitor Library for Proteus: Red, Green and a Meter Demo

FILM CAPACITOR LIBRARY FOR PROTEUS - V1.0 (a real red or green box that prints its own code, with a pop-up)
Designed by The Engineering Projects
www.TheEngineeringProjects.com

IMPORTANT LINKS
Article (read it first - pictures, step by step, every feature explained):
  https://www.theengineeringprojects.com/2026/11/film-capacitor-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/film-capacitor-proteus-library
The demo runs on our Arduino UNO V4.0 (included) - working LEDs, RESET and a
built-in serial monitor, no Virtual Terminal to wire - its own article:
  https://www.theengineeringprojects.com/2026/10/arduino-uno-library-for-proteus-v40.html
The demo's resistors and LED are our own parts too (included):
  https://www.theengineeringprojects.com/2026/11/resistor-library-for-proteus.html
Support us (the libraries are free):
  https://www.theengineeringprojects.com/donate

FILE STRUCTURE
Film-Capacitor-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEPFILM.LIB                                    45.1 KB   the library -> LIBRARY folder
|   |-- TEPLED5MM.LIB                                  21.8 KB   a part the demo uses -> LIBRARY folder
|   |-- TEPRESISTOR.LIB                               306.9 KB   a part the demo uses -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEPARDUINO.DLL                                883.5 KB   the Arduino board model -> MODELS folder
|   |-- TEPFILM.DLL                                   301.5 KB   the model -> MODELS folder
|   |-- TEPLED5MM.DLL                                 289.5 KB   its model -> MODELS folder
|   |-- TEPRESISTOR.DLL                               311.0 KB   its model -> MODELS folder
|-- Proteus Simulation/
|   |-- Cap_Meter_Demo.hex                             14.3 KB   the demo firmware
|   |-- Film-Capacitor-Meter-ArduinoUnoV4.pdsprj       22.8 KB   the demo project
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPFILM.DLL                                   301.5 KB   copy of the model
|   |-- TEPLED5MM.DLL                                 289.5 KB   copy of its model
|   |-- TEPRESISTOR.DLL                               311.0 KB   copy of its model
|-- Arduino Code/
|   |-- Cap_Meter_Demo/Cap_Meter_Demo.ino               2.0 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~11.9 KB   this file
Total: 4.10 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
The box film capacitor, the neat red or green block in filters and audio circuits, drawn at true
scale: 7.2 mm long, 7.5 mm high, with two legs 5 mm apart, printing its own code. It is a true
analog part:
  * A capacitance behind a very small series resistance (ESR). It has no polarity.
  * The code on the box follows the value: 105J for 1 uF, 474J for 470 nF, and so on from 10 nF to
    4.7 uF in the E6 series.
  * A small bar shows the charge at Run.
  * Too much voltage breaks it, and it opens. Fit a new part from the pop-up, or press Stop and Run.
  * Click it at Run for its pop-up: the code explained, the charge, the energy, the live values,
    graphs, an event log and a check page. Its chips step the value through the E6 series and
    discharge it by hand.
The body is drawn as on the real part and to true scale against our Arduino.
The TEP signature and the pop-up are TEP additions.

TWO DEVICES (search "CAPFILM" in Pick Devices):
  CAPFILMREDTEP     "Film Capacitor Red V1.0"
  CAPFILMGREENTEP   "Film Capacitor Green V1.0"
Both are in TEPFILM.LIB (category Capacitors > Polyester Film), prefix C, model TEPFILM.DLL. Pins 1
and 2; either way round.

THE POP-UP
Click the part at Run. It stays closed until then (you can turn "Open the panel at Run" on in its
Settings page). Tabs:
    Capacitor  the state (EMPTY, CHARGING, HOLDING, DISCHARGING, OVER VOLTAGE, BURST), the box with
    its code, the code explained, what it holds, and eight live values. The toolbar: E6 down, E6 up,
    Discharge, New part.
    Graphs     the live values over the last 2, 6 or 15 s. Live / Freeze.
    Event log  every change and warning; filters All / Changes / Warnings, Pause, Clear
    Check      what the part is doing and what to look at, each with a verdict (green = fine, amber
    = check, red = wrong)
    Settings   theme, text size, open at Run, window size
    Help       report a bug, suggest a feature, article, updates, donate, forum; Copy diagnostics
    for a bug report

TEST STATUS
V1.0: verified in Proteus 8.5 on 31 Oct 2026 (the demo project as shipped: an A4 sheet, an Arduino UNO V4.0).
What the runs showed (the model's own numbers and the sketch's monitor):
  * The project loads and starts cleanly. The meter read 1.00 uF for the 1 uF on the sheet: 100.4 ms
    to 63 %.
  * The E6 chips stepped the value, and the meter followed: 3.30, 2.20, 1.50 and 1.00 uF, then 684,
    474 and 333 nF for 680, 470 and 330 nF. The time ran a steady 0.3 to 0.4 ms long.
  * The box printed 335J at 3.3 uF and 334J at 330 nF. The green LED lit when each reading was
    ready.
  * The pop-up: Capacitor, Graphs, Event log, Check - all four pages followed the run.

INSTALLATION (about 2 minutes)
1. Close Proteus. Extract the WHOLE ZIP to a normal folder (e.g. Desktop).
2. Copy everything in "Proteus Library Files" (TEPFILM.LIB, TEPRESISTOR.LIB, TEPLED5MM.LIB and our
Arduino library V4.0, ArduinoV4TEP.LIB, with the ARDUINO UNO V4.0 used by the demo) to the LIBRARY
folder of Proteus, for example:
     C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\LIBRARY
   (use the folder that already holds Proteus's own .LIB files).
3. Copy TEPFILM.DLL, TEPRESISTOR.DLL, TEPLED5MM.DLL and TEPARDUINO.DLL from "Proteus Model Files" to
the MODELS folder (...\Proteus 8 Professional\MODELS).
4. Delete TEPFILM.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "CAPFILM".

RUN THE DEMO
"Proteus Simulation\Film-Capacitor-Meter-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file and
the DLLs beside the project.
  ARD1:   Arduino UNO V4.0 running Cap_Meter_Demo.hex, its serial monitor built in (window "TEP
  Arduino UNO - ARD1").
  R1, C1: the meter: D8, 100k, A0, 1 uF, GND.
  R2:     D9 through 220 ohm to A0: it empties C1 quickly between measurements.
  D1:     a green LED on D7 through 220 ohm, lit when a reading is ready.
  1. Press Run. The sketch empties C1, charges it and times it to 63 %, about once a second.
  2. C = time / R. The monitor prints the time and the value.
  3. Click C1 and press E6 up or E6 down. The meter follows.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  D8 - 100k - A0 - capacitor - GND ; D9 - 220 ohm - A0
The time to 63 % is R x C, so a known R gives C.
REAL HARDWARE:
 * The sketch's result is only as good as R1: measure it, or use a 1 % part.
 * A0 draws almost nothing, but a very small capacitor charges faster than the sketch can time it.
   Use a bigger resistor for those.
 * Discharge a capacitor before you connect it to a pin.

THE DEMO SKETCH ON THE SERIAL MONITOR (Cap_Meter_Demo V1.0, 9600 baud)
There are no commands. The sketch prints a reading about once a second.
EXPECTED MONITOR OUTPUT
  Film Capacitor meter - The Engineering Projects

PROPERTIES (double-click the part > Edit Properties)
  Capacitance                    1u, 470n, 100n (a bare number is in uF)
  Voltage rating, V              63
  Series resistance (ESR), ohm   0.02
  Printed code while stopped     picks the code shown on the box; Run sets it from the Capacitance
  box
Every run starts again from the properties.

LINKS.INI (OPTIONAL)
The Help page cards of the pop-up open web pages. To point them somewhere else without a new DLL,
put a text file named links.ini next to TEPFILM.DLL with lines KEY=URL, for example:
  ARTICLE=https://www.theengineeringprojects.com/...
Keys: WEBSITE, FORUM, BUG_REPORT, FEATURE_REQUEST, ARTICLE, USER_GUIDE,
UPDATE_CHECK, DONATE. Only http:// and https:// links are used; lines starting
with # are comments.

TROUBLESHOOTING
* The code on the box does not match the value: press Run once. The model sets the code from the
  Capacitance box, to the nearest E6 value.
* BURST: it saw too much voltage. Fix the circuit, then New part.
* The meter prints no capacitor: C1 is open, or more than 30 uF.
* The pop-up does not open: click the part at Run (it stays closed until then).
* The part is not simulated: TEPFILM.DLL is missing from MODELS and from the project folder. No UNO
  / no monitor window: TEPARDUINO.DLL is missing, or click the UNO's USB port.

BUG REPORTS AND FEATURE REQUESTS
Please post them in our forum with a screenshot, the Serial Monitor text, the
simulation log and the pop-up's Copy diagnostics text:
  https://www.theengineeringprojects.com/forum/category/film-capacitor-proteus-library

SUPPORT US
This library is free. If it saves you time, please support our work:
  https://www.theengineeringprojects.com/donate

WEBSITE
  https://www.theengineeringprojects.com/

LICENCES AND THIRD-PARTY NOTES
* The model (TEPFILM.DLL), the symbols and artwork, the other parts of ours in the demo and the
  Arduino Library V4.0 (ArduinoV4TEP.LIB / TEPARDUINO.DLL, with its built-in TEP Serial Monitor
  Advance) are made by The Engineering Projects. The models use only standard Windows libraries; no
  Visual C++ redistributable is needed.
  The C++ source code is not included.
* Arduino UNO V4.0 (ArduinoV4TEP.LIB / TEPARDUINO.DLL, our Arduino Library V4.0 - its
  microcontroller is Proteus's own AVR model): The Engineering Projects,
  https://www.theengineeringprojects.com/2026/10/arduino-uno-library-for-proteus-v40.html
* The .hex file is built from the demo sketch and the Arduino AVR core 1.8.6, which includes
  LGPL-licensed code; its source code is available at
  https://github.com/arduino/ArduinoCore-avr/tree/1.8.6
* Proteus is a product of Labcenter Electronics and is not included. Arduino is a trademark of Arduino SA.
  This library is not made or endorsed by Arduino or Labcenter.

REBUILDING THE FIRMWARE (OPTIONAL)
The HEX file is supplied; Arduino IDE is not needed to run the demo. To edit the sketch, open
Arduino Code\Cap_Meter_Demo\Cap_Meter_Demo.ino, select Arduino Uno and use Sketch > Export Compiled
Binary. Replace the simulation's .hex with the exported HEX. The sketch needs 5,182 bytes of flash
and 213 bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: the capacitance, the ESR, a very slow self-discharge, the charge and stored energy,
heating under over voltage, breaking and opening. The printed code follows the value.
Not modelled: the self-healing of metallised film, the part's inductance, the tolerance.

VERSION
TEP Film Capacitor library V1.0 (Nov 2026). Devices CAPFILMREDTEP, CAPFILMGREENTEP (TEPFILM.LIB /
TEPFILM.DLL). Demo sketch Cap_Meter_Demo V1.0. Demo board: ARDUINO UNO V4.0 (TEP Arduino Library
V4.0) with its built-in serial monitor.