Project Files of Inductor Library for Proteus: 100uH Power Inductors

INDUCTOR LIBRARY FOR PROTEUS - V1.0 (radial and axial inductors with saturation, and 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/inductor-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/inductor-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
Its switches are our own IRLZ44N MOSFETs (included):
  https://www.theengineeringprojects.com/2026/11/n-mosfet-library-for-proteus.html
the diodes our own 1N5819 Schottky diodes (included):
  https://www.theengineeringprojects.com/2026/11/schottky-diode-library-for-proteus.html
and the output capacitors our own electrolytic capacitors (included):
  https://www.theengineeringprojects.com/2026/11/electrolytic-capacitor-library-for-proteus.html
Support us (the libraries are free):
  https://www.theengineeringprojects.com/donate

FILE STRUCTURE
Inductor-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEP1N5819.LIB                                   9.7 KB   a part the demo uses -> LIBRARY folder
|   |-- TEPELECTRO.LIB                                 10.1 KB   a part the demo uses -> LIBRARY folder
|   |-- TEPINDUCTOR.LIB                                68.1 KB   the library -> LIBRARY folder
|   |-- TEPNMOS.LIB                                    17.9 KB   a part the demo uses -> LIBRARY folder
|   |-- TEPPOWERRES.LIB                               157.2 KB   a part the demo uses -> LIBRARY folder
|   |-- TEPRESISTOR.LIB                               306.9 KB   a part the demo uses -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEP1N5819.DLL                                 286.5 KB   its model -> MODELS folder
|   |-- TEPARDUINO.DLL                                883.5 KB   the Arduino board model -> MODELS folder
|   |-- TEPELECTRO.DLL                                294.5 KB   its model -> MODELS folder
|   |-- TEPINDUCTOR.DLL                               311.0 KB   the model -> MODELS folder
|   |-- TEPNMOS.DLL                                   295.0 KB   its model -> MODELS folder
|   |-- TEPPOWERRES.DLL                               304.5 KB   its model -> MODELS folder
|   |-- TEPRESISTOR.DLL                               311.0 KB   its model -> MODELS folder
|-- Proteus Simulation/
|   |-- Inductor_Demo.hex                              15.4 KB   the demo firmware
|   |-- Inductors-Boost-ArduinoUnoV4.pdsprj            29.6 KB   the demo project
|   |-- TEP1N5819.DLL                                 286.5 KB   copy of its model
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPELECTRO.DLL                                294.5 KB   copy of its model
|   |-- TEPINDUCTOR.DLL                               311.0 KB   copy of the model
|   |-- TEPNMOS.DLL                                   295.0 KB   copy of its model
|   |-- TEPPOWERRES.DLL                               304.5 KB   copy of its model
|   |-- TEPRESISTOR.DLL                               311.0 KB   copy of its model
|-- Arduino Code/
|   |-- Inductor_Demo/Inductor_Demo.ino                 2.7 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~14.3 KB   this file
Total: 6.06 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
Two through-hole inductors, drawn at true scale:
  * A radial ferrite drum-core power inductor, 9 mm across and 14 mm tall, its copper winding
    showing, legs 5.08 mm apart - as the Bourns
    RLB0914-101KL: 100 uH, saturation 2.1 A, winding resistance 0.28 ohm, 1 A rated.
  * A small axial colour-coded inductor, 2.8 x 7.1 mm, light green with four bands giving its value
    in uH - as the Bourns 78F101J: 100 uH +-5 %,
    4.1 ohm, 165 mA rated. Its bands follow its value at Run; while stopped, pick them in its
    "Colour bands while stopped" box.
  * One analog model: the inductance with its saturation (10 % down at the saturation current and
    falling past it), the winding's resistance
    warming with the current (the rated current raises it 40 K), backward Euler on the flux. Type
    any value (100u, 4u7, 1m): AUTO scales the
    resistance and the currents from the 100 uH part.
  * Click one at Run for the pop-up: the part in its magnetic field, a scope of its current and the
    voltage across it, the inductance against
    the current with the saturation current marked, eight live values, graphs, an event log and a
    check page.
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 "INDUCTOR" in Pick Devices):
  INDUCTORRADIALTEP  "Radial Inductor V1.0" in TEPINDUCTOR.LIB (Inductors > Radial Power), prefix L,
  model TEPINDUCTOR.DLL. Pins 1, 2.
  INDUCTORAXIALTEP   "Axial Inductor V1.0" in TEPINDUCTOR.LIB (Inductors > Axial), prefix L, model
  TEPINDUCTOR.DLL. Pins 1, 2.

THE POP-UP
Click the part at Run. Tabs:
    Inductor   the part in its field (more lines, and amber past saturation), a scope of the last
    cycles (its current, the voltage across it),
               the inductance against the current with the saturation current and the window's peak,
               and eight live values: peak, RMS and
               average current, the switching frequency, L at the peak, the energy at the peak, the
               copper loss, the winding's temperature.
               The toolbar: New part and its values.
    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; Timer1 switches both boost converters at 31.25 kHz and the
    sketch regulates both outputs, printing
    them every 250 ms: 12.00 V at a 53 % duty (OUT1) and 12.04 V at 42 % (OUT2) at 1.25 s, both
    within 0.25 s of the start.
  * L1 (radial 100 uH drum core, 0.28 ohm, saturation 2.1 A, 1 A rated) feeding 100 mA at 12 V: 31.2
    kHz, discontinuous (back to zero each
    cycle), peaks of 928 mA, 471 mA RMS, 371 mA average; the inductance at the peak 97.9 uH (-2 %);
    62 mW in the winding, 25 C.
  * L2 (axial 100 uH colour-coded, 4.1 ohm, 165 mA rated) feeding 36 mA at 12 V: OVER RATING - 273
    mA RMS, peaks of 545 mA past its 330 mA
    (twice the rating: no saturation current is published), the inductance at the peak 75.8 uH (-24
    %); 319 mW in the winding, 36 C and rising.
  * The pop-up: Inductor (the part in its field, a scope of its current and voltage, the inductance
    against the current), Graphs, Event log,
    Check - all four pages followed the run, for both inductors.

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" (TEPINDUCTOR.LIB, TEPRESISTOR.LIB, TEPPOWERRES.LIB,
TEPNMOS.LIB, TEP1N5819.LIB, TEPELECTRO.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 TEPINDUCTOR.DLL, TEPRESISTOR.DLL, TEPPOWERRES.DLL, TEPNMOS.DLL, TEP1N5819.DLL,
TEPELECTRO.DLL and TEPARDUINO.DLL from "Proteus Model Files" to the MODELS folder (...\Proteus 8
Professional\MODELS).
4. Delete TEPINDUCTOR.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "INDUCTOR".

RUN THE DEMO
"Proteus Simulation\Inductors-Boost-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file and the
DLLs beside the project.
  ARD1:   Arduino UNO V4.0 running Inductor_Demo.hex, its serial monitor built in (window "TEP
  Arduino UNO - ARD1").
  Boost 1:  VCC - L1 radial 100 uH - SW1; Q1 IRLZ44N from SW1 to GND (D9 - R1 100 - gate); D1 1N5819
  SW1 - OUT1; C1 100u; R3 120R 5 W load;
            R5 / R6 20k / 10k from OUT1 to A0
  Boost 2:  VCC - L2 axial 100 uH - SW2; Q2 (D10 - R2 100 - gate); D2 SW2 - OUT2; C2 100u; R4 330R 5
  W load; R7 / R8 to A1
  1. Press Run. Timer1 switches Q1 and Q2 at 31.25 kHz; every millisecond the sketch nudges each
  duty to hold 12 V.
  2. Click L1 and L2: L1 runs well inside its ratings; L2, a small choke, is over its rated current
  and past saturation.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  boost: VCC - inductor - switch node; an N-MOSFET from the switch node to GND; a Schottky diode
  from the switch node to the output; a capacitor
         and the load on the output; a divider to an analog pin. Never run the switch at 100 %.
REAL HARDWARE:
 * Choose an inductor by two currents: the peak must stay under its saturation current, the RMS
   under its rated current.
 * The DCR turns current into heat: a few ohms is fine for a signal choke, not for a power path.
 * Keep the switching loop (switch, diode, capacitor) short; inductors with an open core radiate a
   field.
 * Read the bands in uH: brown black brown gold = 10 x 10 uH, +-5 %.

THE DEMO SKETCH ON THE SERIAL MONITOR (Inductor_Demo V1.0, 9600 baud)
There are no commands. The sketch regulates both outputs and prints them every 250 ms.
EXPECTED MONITOR OUTPUT
  Two boost converters - The Engineering Projects
  t=1.00 s: OUT1 12.00 V 54%, OUT2 12.00 V 42%

PROPERTIES (double-click the part > Edit Properties)
  Inductance (VALUE)               100u, 4u7, 1m, 220n (a bare number is in uH)
  Winding resistance (DCR)         ohm, or AUTO (scaled from the 100 uH part)
  Saturation current (ISAT)        A, or AUTO
  Rated current (IRMS)             A, or AUTO (the current that raises the winding 40 K)
  Colour bands while stopped       the axial's bands on the stopped sheet (Run sets them from the
  value)
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 TEPINDUCTOR.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
* SATURATING: the peak current is past the saturation current - a bigger inductor, or less current.
* OVER RATING: the RMS current is past the rating - the winding heats; a part with a higher rating.
* BURNT OPEN: the winding passed 180 C - New part, and fix the current.
* The output will not rise: check the diode's direction and the switch's gate drive.
* The part is not simulated: TEPINDUCTOR.DLL is missing from MODELS and from the project folder.
* The part is not simulated: TEPINDUCTOR.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/inductor-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 (TEPINDUCTOR.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\Inductor_Demo\Inductor_Demo.ino, select Arduino Uno and use Sketch > Export Compiled
Binary. Replace the simulation's .hex with the exported HEX. The sketch needs 5,588 bytes of flash
and 225 bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: the inductance with its saturation, the winding's resistance and its rise with
temperature, the winding's heat.
Not modelled: the core's loss at high frequency, the self-resonance, the winding's capacitance,
coupling between inductors. The axial part's
datasheet gives no saturation current: the model takes twice its rated current.

VERSION
TEP Inductor library V1.0 (Nov 2026). Devices INDUCTORRADIALTEP and INDUCTORAXIALTEP
(TEPINDUCTOR.LIB / TEPINDUCTOR.DLL). Demo sketch Inductor_Demo V1.0. Demo board: ARDUINO UNO V4.0
(TEP Arduino Library V4.0) with its built-in serial monitor.