Project Files of Rocker Switch Library for Proteus: Real KCD1 Power Switch

ROCKER SWITCH LIBRARY FOR PROTEUS - V1.0 (a real KCD1 power switch you press with a click, 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/rocker-switch-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/rocker-switch-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 capacitor is our own part too (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
Rocker-Switch-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEPELECTRO.LIB                                 10.1 KB   a part the demo uses -> 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
|   |-- TEPROCKER.LIB                                  13.1 KB   the library -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEPARDUINO.DLL                                883.5 KB   the Arduino board model -> MODELS folder
|   |-- TEPELECTRO.DLL                                294.5 KB   its model -> MODELS folder
|   |-- TEPLED5MM.DLL                                 289.5 KB   its model -> MODELS folder
|   |-- TEPRESISTOR.DLL                               311.0 KB   its model -> MODELS folder
|   |-- TEPROCKER.DLL                                 276.5 KB   the model -> MODELS folder
|-- Proteus Simulation/
|   |-- Power_Bus_Demo.hex                              8.9 KB   the demo firmware
|   |-- Rocker-Switch-Power-Bus-ArduinoUnoV4.pdsprj    23.1 KB   the demo project
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPELECTRO.DLL                                294.5 KB   copy of its model
|   |-- TEPLED5MM.DLL                                 289.5 KB   copy of its model
|   |-- TEPRESISTOR.DLL                               311.0 KB   copy of its model
|   |-- TEPROCKER.DLL                                 276.5 KB   copy of the model
|-- Arduino Code/
|   |-- Power_Bus_Demo/Power_Bus_Demo.ino               1.9 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~12.0 KB   this file
Total: 4.60 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
The KCD1 rocker switch, drawn at true scale from the front: a black bezel 15 x 21 mm, a red rocker
marked I and O, and two legs. It is a true analog part:
  * SPST: leg 1 joins leg 2 through a small contact resistance when the I side is pressed, and the
    contact is open on O.
  * Click it at Run and the rocker tips over. The sheet keeps that position after Stop, and you can
    pick it while stopped.
  * The contact bounces for a few ms as it closes, and the pop-up records the peak current, so the
    rush into a capacitor shows.
  * The small dot on the bezel opens the pop-up: the contact, the 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.

ONE DEVICE (search "SWITCHROCKER" in Pick Devices):
  SWITCHROCKERTEP   "Rocker Switch V1.0" in TEPROCKER.LIB (category Switches and Relays > Switches),
  prefix SW, model TEPROCKER.DLL. Pins 1 and 2.

THE POP-UP
Click the small dot at Run; a click anywhere else on the switch tips it over. Tabs:
    Switch     ON or OFF, the switch, the contact with the live path, and eight live values. The
    toolbar: Flip.
    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 with the rocker on O, the bus at 0 V and the LED dark.
  * Three times ON and OFF: the bus rose past 4.4 V in 25 to 26 ms, and took 1666 to 1667 ms to fall
    below 0.5 V. The LED lit at 12.6 mA and the switch carried 17.4 mA.
  * The rush into the empty 1000 uF capacitor peaked at 473 mA through the contact, against its 6 A
    rating, with R1 (10 ohm) in the way.
  * Each flip made 4 or 5 edges as the contact landed, settled in 3.05 to 3.56 ms, and the rocker's
    tilt showed on the sheet at Run.
  * The pop-up: Switch, 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" (TEPROCKER.LIB, TEPRESISTOR.LIB, TEPLED5MM.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 TEPROCKER.DLL, TEPRESISTOR.DLL, TEPLED5MM.DLL, TEPELECTRO.DLL and TEPARDUINO.DLL from
"Proteus Model Files" to the MODELS folder (...\Proteus 8 Professional\MODELS).
4. Delete TEPROCKER.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "SWITCHROCKER".

RUN THE DEMO
"Proteus Simulation\Rocker-Switch-Power-Bus-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file
and the DLLs beside the project.
  ARD1:   Arduino UNO V4.0 running Power_Bus_Demo.hex, its serial monitor built in (window "TEP
  Arduino UNO - ARD1").
  SW1:    the main power switch: leg 1 on +5V, leg 2 to R1.
  R1:     10 ohm, the soft start: it limits the rush into C1.
  C1:     1000 uF on the BUS, the store of a small machine.
  R3:     1k from the BUS to GND, the bleeder: it empties C1 after the switch opens.
  D1:     a green LED on the BUS through R2 (220 ohm).
  A0:     watches the BUS through R4 (10k). The sketch only times the bus: it does not control the
  power.
  1. Press Run. The rocker is on O and the LED is dark.
  2. Click SW1. The LED lights, and the monitor says how long the bus took to rise.
  3. Click it again. The LED fades out, and the monitor says how long the bus took to fall.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  +5V - 1 ; 2 - the load : a power switch
  2 - R (a few ohm) - big capacitor : a soft start for the rush
  big capacitor - R (1k or more) - GND : a bleeder
REAL HARDWARE:
 * A KCD1 is rated about 6 A at 250 V AC and 10 A at 125 V AC. Read the data sheet of yours, and
   expect less on DC.
 * The model warns at 6 A on the Check page. It does not know your voltage.
 * On the mains, use a rocker made for it, in a proper box, with the lugs covered. Leave mains
   wiring to a qualified person.
 * It snaps into a 13 x 19 mm cut-out in a panel.

THE DEMO SKETCH ON THE SERIAL MONITOR (Power_Bus_Demo V1.0, 9600 baud)
There are no commands. The sketch prints a line when the bus rises and when it falls.
EXPECTED MONITOR OUTPUT
  Rocker Switch power bus - The Engineering Projects
  Press the I side of SW1
  Power on 1: the bus rose in 26 ms

PROPERTIES (double-click the part > Edit Properties)
  Contact resistance, ohm    0.02
  Contact bounce, ms         3
  Position while stopped     OFF or ON
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 TEPROCKER.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
* A click opens the pop-up: you clicked the small dot. Click the rocker to tip it over.
* The LED stays lit for a while after OFF: that is C1 emptying through R3 and the LED, as it should.
* The bus never falls to 0 V: check R3, the bleeder.
* The Peak current tile is high: a capacitor straight after the switch pulls a rush. Add a few ohms
  in series.
* The part is not simulated: TEPROCKER.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/rocker-switch-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 (TEPROCKER.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\Power_Bus_Demo\Power_Bus_Demo.ino, select Arduino Uno and use Sketch > Export Compiled
Binary. Replace the simulation's .hex with the exported HEX. The sketch needs 3,222 bytes of flash
and 209 bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: the contact resistance, contact bounce, the peak current and the current rating on the
Check page.
Not modelled: the arc on a heavy load, wear, the voltage rating, a lamp inside the rocker.

VERSION
TEP Rocker Switch library V1.0 (Nov 2026). Device SWITCHROCKERTEP (TEPROCKER.LIB / TEPROCKER.DLL).
Demo sketch Power_Bus_Demo V1.0. Demo board: ARDUINO UNO V4.0 (TEP Arduino Library V4.0) with its
built-in serial monitor.