Project Files of Emergency Stop Switch Library for Proteus: Real Latching E-Stop

EMERGENCY STOP SWITCH LIBRARY FOR PROTEUS - V1.0 (a real 22 mm E-stop with NC and NO blocks, 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/emergency-stop-switch-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/emergency-stop-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 START button is our own part too (included):
  https://www.theengineeringprojects.com/2026/11/push-button-library-for-proteus.html
Support us (the libraries are free):
  https://www.theengineeringprojects.com/donate

FILE STRUCTURE
Emergency-Stop-Switch-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEPBUTTON.LIB                                  20.7 KB   a part the demo uses -> LIBRARY folder
|   |-- TEPESTOP.LIB                                   22.8 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
|   |-- TEPBUTTON.DLL                                 274.0 KB   its model -> MODELS folder
|   |-- TEPESTOP.DLL                                  278.5 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/
|   |-- Emergency-Stop-Machine-ArduinoUnoV4.pdsprj     23.6 KB   the demo project
|   |-- Estop_Demo.hex                                 10.0 KB   the demo firmware
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPBUTTON.DLL                                 274.0 KB   copy of its model
|   |-- TEPESTOP.DLL                                  278.5 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/
|   |-- Estop_Demo/Estop_Demo.ino                       2.5 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~11.9 KB   this file
Total: 4.59 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
The 22 mm emergency stop switch, drawn at true scale from the side as it sits in a panel: a red
mushroom head 40 mm across, its yellow ring nut, the panel,
the mounting base and two contact blocks. It is a true analog part:
  * Two separate contact blocks: NC 11-12 (closed while READY) and NO 23-24 (closed while LATCHED).
  * Click it at Run and the head latches in. Click again to release it: the click stands in for the
    twist of a real one.
  * The sheet keeps the position after Stop, and you can pick it while stopped.
  * The contacts bounce for a few ms, and the small dot on the base opens the pop-up: the contacts,
    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 "SWITCHESTOP" in Pick Devices):
  SWITCHESTOPTEP   "Emergency Stop Switch V1.0" in TEPESTOP.LIB (category Switches and Relays >
  Switches), prefix SW, model TEPESTOP.DLL. Pins 11, 12 (NC) and 23, 24 (NO).

THE POP-UP
Click the small dot at Run; a click anywhere else on the switch latches or releases it. Tabs:
    Switch     READY or LATCHED, the switch, both contact blocks with their live paths, 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: the E-stop is READY and the machine (LED D1) waits for
    START.
  * START ran the machine: D1 lit at 12.6 mA through the NC block, 11-12.
  * Pushing the E-stop latched it in: D1 went dark at once, the sketch printed E-STOP 1, and a START
    while it was latched was refused.
  * Releasing it did not restart the machine: the sketch waited, and only the next START ran it
    again.
  * The two changes settled in 3.01 and 3.13 ms with 5 edges each, and the head showed pushed in on
    the sheet while latched.
  * 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" (TEPESTOP.LIB, TEPRESISTOR.LIB, TEPLED5MM.LIB,
TEPBUTTON.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 TEPESTOP.DLL, TEPRESISTOR.DLL, TEPLED5MM.DLL, TEPBUTTON.DLL and TEPARDUINO.DLL from "Proteus
Model Files" to the MODELS folder (...\Proteus 8 Professional\MODELS).
4. Delete TEPESTOP.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "SWITCHESTOP".

RUN THE DEMO
"Proteus Simulation\Emergency-Stop-Machine-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file
and the DLLs beside the project.
  ARD1:   Arduino UNO V4.0 running Estop_Demo.hex, its serial monitor built in (window "TEP Arduino
  UNO - ARD1").
  SW1:    the E-stop. D8 to 11; 12 through R1 (220 ohm) to LED D1, the machine. 23 to GND, 24 to D2
  (pull-up).
  SW2:    START, our green push button, from D3 to GND (pull-up).
  The NC block cuts the machine's power by itself; the NO block tells the sketch.
  1. Press Run. The machine waits for START.
  2. Press START. D1 lights.
  3. Click SW1. D1 goes dark at once, and START is refused.
  4. Click SW1 again to release it. The machine stays stopped until START.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  power - 11 ; 12 - the load : the E-stop cuts the power itself (the NC block)
  GND - 23 ; 24 - pin (pull-up) : the sketch sees LOW while the E-stop is latched (the NO block)
REAL HARDWARE:
 * A real E-stop has a red head on a yellow background, latches when pushed, and is released by a
   twist or a pull.
 * Its NC contacts have positive opening: they are forced apart even if they weld.
 * Contact blocks are typically rated 10 A thermal, and about 3 A at 240 V AC for a coil.
 * An E-stop for a real machine belongs in a safety circuit designed to the standards. This demo
   only shows the idea.

THE DEMO SKETCH ON THE SERIAL MONITOR (Estop_Demo V1.0, 9600 baud)
There are no commands. The sketch prints each START, E-STOP and release.
EXPECTED MONITOR OUTPUT
  Emergency Stop demo - The Engineering Projects
  Press START to run the machine
  START: the machine is running

PROPERTIES (double-click the part > Edit Properties)
  Contact resistance, ohm    0.01
  Contact bounce, ms         3
  Position while stopped     READY or LATCHED
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 TEPESTOP.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 head or the blocks to latch or
  release it.
* The machine does not start after a release: that is the point. Press START.
* START does nothing: the E-stop is still latched. Release it first.
* The part is not simulated: TEPESTOP.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/emergency-stop-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 (TEPESTOP.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\Estop_Demo\Estop_Demo.ino, select Arduino Uno and use Sketch > Export Compiled Binary.
Replace the simulation's .hex with the exported HEX. The sketch needs 3,622 bytes of flash and 213
bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: both contact blocks, the latch, contact bounce, the current rating on the Check page.
Not modelled: the twist itself, positive opening of a welded contact, safety relays and the voltage
rating.

VERSION
TEP Emergency Stop Switch library V1.0 (Nov 2026). Device SWITCHESTOPTEP (TEPESTOP.LIB /
TEPESTOP.DLL). Demo sketch Estop_Demo V1.0. Demo board: ARDUINO UNO V4.0 (TEP Arduino Library V4.0)
with its built-in serial monitor.