Project Files of Passive Buzzer Library for Proteus: Magnetic Buzzer and Piezo Disc

PASSIVE BUZZER LIBRARY FOR PROTEUS - V1.0 (a magnetic passive buzzer and a piezo disc that sound the tone you give them)
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/passive-buzzer-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/passive-buzzer-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 resistor is our own (included):
  https://www.theengineeringprojects.com/2026/11/resistor-library-for-proteus.html
Its buttons are our own push buttons (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
Passive-Buzzer-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
|   |-- TEPPASSIVE.LIB                                 13.4 KB   the library -> 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
|   |-- TEPPASSIVE.DLL                                288.5 KB   the model -> MODELS folder
|   |-- TEPRESISTOR.DLL                               311.0 KB   its model -> MODELS folder
|-- Proteus Simulation/
|   |-- Chime_Sweep_Demo.hex                           14.1 KB   the demo firmware
|   |-- Passive-Buzzer-Chime-ArduinoUnoV4.pdsprj       23.1 KB   the demo project
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPBUTTON.DLL                                 274.0 KB   copy of its model
|   |-- TEPPASSIVE.DLL                                288.5 KB   copy of the model
|   |-- TEPRESISTOR.DLL                               311.0 KB   copy of its model
|-- Arduino Code/
|   |-- Chime_Sweep_Demo/Chime_Sweep_Demo.ino           2.1 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~13.4 KB   this file
Total: 4.01 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
Passive sounders, drawn at true scale. No oscillator inside: they sound the tone they are driven
with, on your PC's speaker too.
  * A 12 x 8.5 mm magnetic passive buzzer, side view on its green board, rated like the CUI
    CEM-1206S: 5 V (3 to 8 V), a 47 ohm coil, loudest at
    2.4 kHz, 85 dB at 10 cm. Electrically its coil.
  * A 27 mm piezo disc in the style of the Murata 7BB-27-4: brass, white ceramic, a silver
    electrode, red and black leads; about 20 nF, loudest at
    4.6 kHz. Electrically a capacitor: a pin drives it straight away.
  * The model times the edges of the drive: frequency, note and duty, then the loudness from its
    frequency response, the drive and the duty.
    Plain DC gives one click and silence. The top of the buzzer and the disc's electrode move while
    they sound.
  * Click one at Run for the pop-up: the tone, the note, the loudness on its frequency curve, mute
    and volume, 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 "PASSIVE" or "PIEZO" in Pick Devices):
  BUZZERPASSIVETEP   "Passive Buzzer V1.0" in TEPPASSIVE.LIB (Speakers & Sounders > Generic), prefix
  BZ, model TEPPASSIVE.DLL. Pins + and -.
  PIEZODISC27TEP     "Piezo Disc 27mm V1.0" in TEPPASSIVE.LIB (Speakers & Sounders > Generic),
  prefix BZ, model TEPPASSIVE.DLL. Pins + (red), - (black).

THE POP-UP
Click the part at Run. Tabs:
    Buzzer     the state (SOUNDING with the frequency and the loudness, DC, SILENT), the part drawn
    large, its loudness against frequency with the
               tone on it, and eight live values. The toolbar: Mute and the PC volume (10, 25, 40,
               70 %).
    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. At power-up the sketch puts plain DC on BZ1 for 0.3 s:
    1.41 V across the coil and no tone - the pop-up logs
    one click, as a real passive buzzer gives.
  * SW1 played the chime on BZ2, the piezo disc, straight from D8: four tones, C7 2102 Hz, E7 2662
    Hz, G7 3167 Hz and C8 4204 Hz, each 0.27 s long,
    14, 11, 8 and 1 dB below its loudest as they climb towards its 4.6 kHz resonance. 5.00 V peak,
    51 % duty, 0.84 mA on average.
  * SW2 swept BZ1, the magnetic buzzer, from 500 Hz to 5 kHz through R1 (100 ohm): 46 tones in 2.79
    s, each one logged. At 2717 Hz it gave about
    73 dB at 10 cm with 1.41 V peak on the coil and 29.9 mA at the most from the pin; the Check page
    notes that 1.41 V is under its 3 V minimum.
  * Paused, the PC's sound stops with the simulation and goes on with it.
  * The pop-up: Buzzer, Graphs, Event log, Check - all four pages followed the run, for both parts.

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" (TEPPASSIVE.LIB, TEPRESISTOR.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 TEPPASSIVE.DLL, TEPRESISTOR.DLL, TEPBUTTON.DLL and TEPARDUINO.DLL from "Proteus Model Files"
to the MODELS folder (...\Proteus 8 Professional\MODELS).
4. Delete TEPPASSIVE.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "PASSIVE or PIEZO".

RUN THE DEMO
"Proteus Simulation\Passive-Buzzer-Chime-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file and
the DLLs beside the project.
  ARD1:   Arduino UNO V4.0 running Chime_Sweep_Demo.hex, its serial monitor built in (window "TEP
  Arduino UNO - ARD1").
  BZ1:    the magnetic passive buzzer on D9 through R1 (100 ohm, our resistor), - to GND.
  BZ2:    the piezo disc straight on D8, - to GND.
  SW1, SW2: our push buttons from D2 and D3 to GND (INPUT_PULLUP).
  1. Press Run. BZ1 gets DC for 0.3 s: one click, no tone.
  2. Click SW1, or open its pop-up and click Press: a chime on the piezo, C7, E7, G7, C8.
  3. Click SW2: the buzzer sweeps from 500 Hz to 5 kHz; watch the dot climb its curve and fall past
  2.4 kHz.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  pin - 100 ohm - magnetic buzzer - GND : the resistor keeps the pin under 40 mA (a transistor gives
  the full volume)
  pin - piezo disc - GND                 : no resistor needed
REAL HARDWARE:
 * tone(pin, hz) makes the square wave; noTone(pin) stops it. An UNO plays one tone() at a time.
 * A magnetic buzzer's coil is about 47 ohm: never put it straight on a pin. Use a resistor, or a
   transistor for the full 85 dB.
 * A piezo disc is quiet in free air: glue it over a small cavity or into a box for much more sound.
 * Each one is loudest near its resonance: 2.4 kHz for the buzzer, 4.6 kHz for the disc.

THE DEMO SKETCH ON THE SERIAL MONITOR (Chime_Sweep_Demo V1.0, 9600 baud)
There are no commands. SW1 plays the chime on the piezo, SW2 the sweep on the buzzer; the sketch
prints each.
EXPECTED MONITOR OUTPUT
  Passive buzzers - The Engineering Projects
  DC on the buzzer for 0.3 s: a passive buzzer only clicks
  Press SW1 for the chime, SW2 for the sweep
  Chime on the piezo:
    C7 2093 Hz

PROPERTIES (double-click the part > Edit Properties)
  Loudest at (VALUE)               2.4kHz (buzzer) or 4.6kHz (disc): the label; the resonance is
  part of each device
  Sound on the PC, %               40 (0 = silent)
  Coil resistance, ohm (buzzer)    47
  Capacitance, nF (disc)           20
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 TEPPASSIVE.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
* It only clicks: it gets DC. A passive part needs a square wave: tone(pin, hz).
* It is quiet: the tone is far from its resonance, or the drive is low (1.4 V on the buzzer through
  100 ohm). Check the pop-up's curve.
* No sound on the PC: the volume is 0, Mute is on, or the PC has no sound device. The simulation
  works the same.
* The Check page warns about the pin current: the buzzer's coil is on a pin with too small a
  resistor.
* The part is not simulated: TEPPASSIVE.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/passive-buzzer-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 (TEPPASSIVE.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\Chime_Sweep_Demo\Chime_Sweep_Demo.ino, select Arduino Uno and use Sketch > Export
Compiled Binary. Replace the simulation's .hex with the exported HEX. The sketch needs 5,126 bytes
of flash and 241 bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: the coil's resistance or the disc's capacitance, the frequency, note and duty of the
drive, the loudness from a resonance of quality Q,
the drive voltage and the duty, the click on DC, the sound on the PC.
Not modelled: the coil's inductance, the sound's real waveform and harmonics, the effect of a cavity
or a box.

VERSION
TEP Passive Buzzer library V1.0 (Nov 2026). Devices BUZZERPASSIVETEP and PIEZODISC27TEP
(TEPPASSIVE.LIB / TEPPASSIVE.DLL). Demo sketch Chime_Sweep_Demo V1.0. Demo board: ARDUINO UNO V4.0
(TEP Arduino Library V4.0) with its built-in serial monitor.