Project Files of Thermoelectric Generator Library for Proteus Simulation

THERMOELECTRIC GENERATOR LIBRARY FOR PROTEUS SIMULATION - V1.0 (the SP1848-27145 Seebeck module, 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/thermoelectric-generator-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/motor-driver-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 measures it with our INA219 library (installed from its own package - not in this zip):
  https://www.theengineeringprojects.com/2026/10/ina219-current-sensor-library-for-proteus-v1-0.html
Support us (the libraries are free):
  https://www.theengineeringprojects.com/donate

FILE STRUCTURE
Thermoelectric-Generator-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEPTEG.LIB                                     14.7 KB   the library -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEPARDUINO.DLL                                883.5 KB   the Arduino board model -> MODELS folder
|   |-- TEPTEG.DLL                                    319.0 KB   the model -> MODELS folder
|-- Proteus Simulation/
|   |-- TEG_Demo.hex                                   25.8 KB   the demo firmware
|   |-- TEG-SP1848-INA219-ArduinoUnoV4.pdsprj          21.0 KB   the demo project
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPTEG.DLL                                    319.0 KB   copy of the model
|-- Arduino Code/
|   |-- TEG_Demo/TEG_Demo.ino                           4.8 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~15.8 KB   this file
Total: 2.63 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
The SP1848-27145 thermoelectric generator (TEG) - the white 40 x 40 mm ceramic module that makes
electricity from a temperature
difference (the Seebeck effect) - drawn at true scale from above (40 x 40 mm, the printed cold face
up, red and black leads; our own
drawing, no maker's mark). Heat one face, cool the other, and it gives a voltage:
  * The electrical side follows the module's published table by the difference between its faces:
    0.97 V open circuit and 225 mA
    short circuit at 20 C of difference, 1.8 V / 368 mA at 40 C, 2.4 V / 469 mA at 60 C, 3.6 V / 558
    mA at 80 C, 4.8 V / 669 mA at
    100 C. Between the points: straight lines. Its internal resistance (the volts over the amps) is
    4.3 to 7.2 ohm.
  * The heat path is modelled too: the heat source (SOURCE, C) under the hot face, the module, the
    heatsink on the cold face
    (HEATSINK: NONE, FINS, FAN, WATER) and the room (AMBIENT). A poor heatsink lets the cold face
    warm up, the difference shrinks and
    the output falls - as on a real module. The faces warm and cool in time; SPEED runs that thermal
    clock faster.
  * The load's current carries extra heat through the module (the Peltier effect), so a loaded
    module shows a slightly smaller
    difference than an open one. Only about 1 % of the heat becomes electricity; the hot face may
    take 150 C at most.
  * On the sheet the module writes its hot face, its cold face and their difference above itself at
    Run. Click it at Run for the
    pop-up: the heat path with every temperature, the load line (volts and watts against current)
    with the working point and the
    matched point, 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.

ONE DEVICE (search "TEGSP" in Pick Devices):
  TEGSP1848TEP  "Thermoelectric Generator SP1848 V1.0" in TEPTEG.LIB (Electromechanical >
  Generators), prefix TEG, model TEPTEG.DLL
                (analog). Pins + and - on the left (the red and black leads). The name starts with T
                so that it sorts after the
                embedded ARDUINO UNO V4.0.

THE POP-UP
Click the part at Run. Tabs:
    Heat       chips: the heat source off, 60, 100, 150, 200 C; the heatsink: none, fins, fan,
    water; Demo. The heat path from the
               bottom up: the heat source, the module (hot ceramic, the pellets, cold ceramic), the
               heatsink, each with its
               temperature; the load line at the present difference: volts (green) and watts
               (orange) against the load's current,
               the matched point (ring), the working point, the table's line at 100 C (dashed);
               eight live values: hot face, cold
               face, difference, heat through the module, output, power and efficiency, open-circuit
               volts and internal resistance,
               the most power a matched load would take.
    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 15 Nov 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 demo as shipped (TEG_Demo, the DEMO heat profile, HEATSINK FAN, SPEED 120, R1 5.6 ohm), one run
(tegfinal2), the model's own pauses:
  * Source 60 C: hot face 58 C, cold face 39 C, 19 C between them: 0.52 V at 92 mA, 48 mW (0.92 V
    open, 4.3 ohm inside); 12 W of heat, 0.4 %.
  * Source 100 C: 96 C / 55 C, 41 C between: 0.98 V at 173 mA, 170 mW (1.83 V open, 4.9 ohm); 25 W
    of heat, 0.7 %.
  * Source 150 C: 144 C / 75 C, 69 C between: 1.45 V at 255 mA, 370 mW (2.92 V open, 5.8 ohm); 42 W
    of heat, 0.9 %; a matched load would take 370 mW.
  * The fan stopped (2 s = four minutes of heating): the cold face climbs to 121 C, 26 C between:
    0.68 V at 120 mA, 82 mW (1.23 V open).
  * The fan back: 144 C / 75 C again, 1.45 V at 255 mA, 370 mW. Heat off at 10.3 s: the difference
    reverses for a moment (the heatsink is still warm), then both faces settle at 25 C (11.562 s),
    no output.
  * The Event log's settled points: 1.293 s (49 mW), 3.342 s (171 mW), 5.372 s (373 mW), 9.552 s
    (368 mW). The highest hot face 148 C (150 C at most), the highest difference 84 C (just after
    the step to 150 C, the heatsink still cool).
  * The INA219 (U1) read 1.45 V at the supply, 25.48 mV on the shunt, 1.428 V on the bus, 254.8 mA;
    the monitor printed "TEG 1.45 V  255 mA  369 mW  load 5.7 ohm  energy 1.03 J". 115 s for the
    12.2 s of 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" (TEPTEG.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 TEPTEG.DLL and TEPARDUINO.DLL from "Proteus Model Files" to the MODELS folder (...\Proteus 8
Professional\MODELS).
4. Delete TEPTEG.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "TEGSP".

RUN THE DEMO
"Proteus Simulation\TEG-SP1848-INA219-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file and
the DLLs beside the project.
  ARD1:   Arduino UNO V4.0 running TEG_Demo.hex, its serial monitor built in (window "TEP Arduino
  UNO - ARD1").
  U1:     our INA219 (its pop-up version) - the generator's + through its 0.1 ohm shunt into the
  load; SDA A4, SCL A5.
  R1:     5.6 ohm, the load (close to the module's own resistance, so it takes almost the most power
  there is).
  TEG1:   the SP1848, SOURCE DEMO, HEATSINK FAN, SPEED 120 (two minutes of heating each simulated
  second): the source goes to 60,
          100 and 150 C (a step every 2 s from 0.3 s), the fan stops at 6.3 s and runs again at 8.3
          s, the heat goes off at 10.3 s.
          The monitor prints the volts, milliamps, milliwatts, the load and the energy every half
          second.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  + to your load (here through the INA219's shunt), - to the load's ground. One module gives a volt
  or two: for 5 V put modules
  in series or use a boost converter made for low voltages.
REAL HARDWARE:
 * The blank face goes on the heat, the printed face under the heatsink, both with thermal paste and
   firm, even pressure.
 * The heatsink matters as much as the heat: a small finned heatsink without a fan soon warms up and
   the output falls.
 * Keep the hot face under 150 C (some sellers say 120 C): no open flame straight on the ceramic.

THE DEMO SKETCH ON THE SERIAL MONITOR (TEG_Demo V1.0, 9600 baud)
The sketch reports every 500 ms. Type a command:
  best       the most power so far       reset      forget it and the energy       rate 1000
  report every 1000 ms       help
EXPECTED MONITOR OUTPUT
  Thermoelectric Generator (SP1848) demo - The Engineering Projects
  TEG 1.45 V  255 mA  369 mW  load 5.7 ohm  energy 1.03 J
  TEG reversed: -41 mA - the cold face is the warmer one now       (just after the heat goes off)

PROPERTIES (double-click the part > Edit Properties)
  Heat source (SOURCE)                 its temperature in C (25 - 250), or DEMO: heated in steps,
  the fan stopped once (100)
  Heatsink (HEATSINK)                  NONE (bare), FINS (a finned heatsink), FAN (fins + a fan),
  WATER (a water block) (FAN)
  Room (AMBIENT)                       the room's temperature, C (25)
  Thermal clock (SPEED)                1 real time, 120 two minutes of heating each simulated
  second, 1 - 120 (1)
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 TEPTEG.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
* No output: there is no difference between the faces - the source is off, or the heatsink is NONE
  and the cold face has warmed up.
* Less than the table says: the table counts the difference between the two FACES; the cold face is
  warmer than the room.
* OVER TEMPERATURE: the hot face is over 150 C - lower the source.
* The temperatures creep slowly: that is real (tens of seconds); raise SPEED to 60 or 120 for a
  quick look.
* A negative output right after the heat goes off: the heatsink is still warm - the difference is
  reversed.
* The part is not simulated: TEPTEG.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/motor-driver-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 (TEPTEG.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\TEG_Demo\TEG_Demo.ino, select Arduino Uno and use Sketch > Export Compiled Binary.
Replace the simulation's .hex with the exported HEX. The sketch needs 9,390 bytes of flash and 504
bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: the open-circuit voltage and the short-circuit current of the published table (straight
lines between its five points,
the average slope past 100 C), so the internal resistance too; the heat path (0.15 K/W from the
source to the hot face, the module's
0.55 W/K, the heatsink 40 / 6 / 1.2 / 0.2 K/W for NONE / FINS / FAN / WATER - our figures); the
faces' heat capacities (8 J/K hot, 6 /
40 / 40 / 60 J/K cold with its heatsink - our figures); the Peltier and Joule heat of the load
current; a reversed difference (a
negative output); a current pushed in from outside (it pumps heat).
Not modelled: the table's change with the mean temperature, the leads' resistance, thermal contact
that varies with pressure, damage
above 150 C (it is reported, not simulated), the heat lost from the module's edges.

VERSION
TEP Thermoelectric Generator library V1.0 (Nov 2026). Device TEGSP1848TEP (TEPTEG.LIB / TEPTEG.DLL).
Demo sketch TEG_Demo V1.0 (the INA219 read straight with Wire). Demo board: ARDUINO UNO V4.0 (TEP
Arduino Library V4.0) with its built-in serial monitor.