Project Files of LM358 Dual Op-Amp Library for Proteus

LM358 DUAL OP-AMP LIBRARY FOR PROTEUS - V1.0 (an LM358 dual operational amplifier 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/lm358-dual-op-amp-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/lm358-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
Support us (the libraries are free):
  https://www.theengineeringprojects.com/donate

FILE STRUCTURE
LM358-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEPLM358.LIB                                   12.1 KB   the library -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEPARDUINO.DLL                                883.5 KB   the Arduino board model -> MODELS folder
|   |-- TEPLM358.DLL                                  311.5 KB   the model -> MODELS folder
|-- Proteus Simulation/
|   |-- LM358_Demo.hex                                 16.1 KB   the demo firmware
|   |-- LM358-OpAmp-ArduinoUnoV4.pdsprj                19.0 KB   the demo project
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPLM358.DLL                                  311.5 KB   copy of the model
|-- Arduino Code/
|   |-- LM358_Demo/LM358_Demo.ino                       2.9 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~13.3 KB   this file
Total: 2.59 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
The LM358 dual operational amplifier as the PDIP-8 chip itself, drawn at true scale (9.81 x 6.35 mm)
- our own drawing:
  * The black body on its side (the notch left, pin 1 bottom left): OUT1 IN1- IN1+ V- along the
    bottom, V+ OUT2 IN2- IN2+ along the top,
    the pin names printed small inside.
  * Two amplifiers as TI's datasheet gives the LM358 (VS = 5 V, 25 C): gain-bandwidth 0.7 MHz,
    open-loop gain 100 V/mV, slew rate
    0.3 V/us (a single dominant pole, the input stage limited smoothly); the input offset (VOS,
    typical 3 mV); input bias -20 nA; inputs
    valid from V- to V+ - 1.5 V (warned above); the output from V- + 5 mV to V+ - 1.5 V through 50
    ohm; 350 uA per amplifier; supply 3 - 30 V.
  * Click it at Run for the pop-up: both amplifiers live (the inputs, their difference, the output
    and its state), amplifier 1's last fast
    edge on a microsecond scope with its 10 - 90 % time and its steepest slope.
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 "LM358" in Pick Devices):
  LM358TEP      "LM358 Dual Op-Amp V1.0" in TEPLM358.LIB (Lab ICs > Op-Amps), prefix U, model
  TEPLM358.DLL (analog). The PDIP-8 pinout.

THE POP-UP
Click the part at Run. Tabs:
    Op-Amps    the two amplifiers as triangles with their input and output voltages and states
    (linear, slewing, at the top, at the bottom,
               comparing), amplifier 1's last fast edge from 10 us before to 70 us after (OUT1, IN1+
               x 10, OUT2), and eight live 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 7 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 project loads and starts cleanly; the demo runs 6 simulated seconds in about two minutes on
    our PC.
  * Amplifier 1 (gain 1 + 33k / 1k = 34, offset +2 mV): with D5 and D6 low, OUT1 sat at 0.0686 V -
    the offset times the gain; the sketch
    printed IN 0.0 mV, OUT1 0.068 V, D2 LOW.
  * D5 high: IN 96.17 mV (the model), OUT1 3.3361 V, IN1- 98.14 mV - the inputs 1.97 mV apart, the
    offset, while the loop holds them; the
    sketch measured IN 96.7 mV (against the UNO's 1.1 V reference) and OUT1 3.335 V: OUT1 / IN 34.5.
    The comparator (amplifier 2, OUT1
    against 2.5 V) went high: 3.499 V, the LM358's top (V+ - 1.5 V); D2 read HIGH.
  * D5 and D6 high: IN 192.3 mV asks for 6.5 V, but OUT1 stopped at 3.494 V (the model) - the sketch
    read 3.491 V, OUT1 / IN only 18.2.
  * The edges (amplifier 1, D5 flipping): rising 0.069 to 3.336 V, 10 - 90 % in 20.51 us, the
    steepest slope 0.263 V/us; falling 3.494 to
    0.072 V in 19.56 us, 0.257 V/us - the 0.3 V/us slew rate nearly reached by a 96 mV step, the
    rest set by the bandwidth (0.7 MHz / 34).
    The comparator's own output slewed between 5.9 mV and 3.499 V. The sketch timed D5 to D2: rising
    28.0 us, falling 26.4 us (5 edges,
    with its own loop time).
  * 69 fast edges in all. The pop-up: Op-Amps (with the microsecond scope), Graphs, Event log, Check
    - all four 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" (TEPLM358.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 TEPLM358.DLL and TEPARDUINO.DLL from "Proteus Model Files" to the MODELS folder (...\Proteus
8 Professional\MODELS).
4. Delete TEPLM358.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "LM358".

RUN THE DEMO
"Proteus Simulation\LM358-OpAmp-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file and the DLLs
beside the project.
  ARD1:   Arduino UNO V4.0 running LM358_Demo.hex, its serial monitor built in (window "TEP Arduino
  UNO - ARD1").
  U1:     the LM358 on 5 V. Amplifier 1: non-inverting, gain 1 + 33k / 1k = 34, its input IN from D5
  and D6 through 100 k each with 2 k to
          ground (about 96 mV per high pin). Amplifier 2: a comparator, OUT1 against 2.5 V (two 10
          k), its output to D2.
  R1 - R7: 100k, 100k, 2k, 1k, 33k, 10k, 10k. A0 reads OUT1, A1 reads IN (against the UNO's internal
  1.1 V reference).
  1. The sketch sets D5 / D6 low, D5 high, then both high and prints IN, OUT1, OUT1 / IN and D2 -
  both high asks for 6.5 V.
  2. It times five edges from D5 to D2. Then D5 flips every 100 ms (for the pop-up's scope).
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  V+: 3 - 30 V (the UNO's 5 V here); V-: ground; the inputs and outputs to your circuit - keep the
  inputs under V+ - 1.5 V.
REAL HARDWARE:
 * On 5 V the LM358's output reaches only about 3.5 V: for a full 0 - 5 V swing choose a
   rail-to-rail op-amp.
 * Keep both inputs below V+ - 1.5 V; they work right down to the negative rail, which suits
   single-supply sensor amplifiers.
 * The offset (up to 7 mV) is multiplied by the gain: trim it, or use AC coupling, for high gains.
 * As a comparator it is slow (microseconds); a real comparator (LM393) switches much faster.

THE DEMO SKETCH ON THE SERIAL MONITOR (LM358_Demo V1.0, 9600 baud)
There are no commands. The sketch steps the input, prints, times five edges, then makes a square
wave.
EXPECTED MONITOR OUTPUT
  LM358 Dual Op-Amp - The Engineering Projects
  D5 high:         IN 96.7 mV, OUT1 3.335 V, OUT1 / IN 34.5, D2 HIGH
  D5 and D6 high:  IN 192.3 mV, OUT1 3.491 V, OUT1 / IN 18.2, D2 HIGH
  D5 to D2: rising 28.0 us, falling 26.4 us (5 edges)

PROPERTIES (double-click the part > Edit Properties)
  Input offsets (VOS)                  the offset voltage of amplifiers 1 and 2, mV ("2, -1"; the
  datasheet: 3 mV typical, 7 mV max)
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 TEPLM358.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 SUPPLY: V+ is missing or under 3 V.
* The output stops at about 3.5 V on 5 V: that is the LM358 - its output reaches V+ - 1.5 V at most.
* The output is not 0 with no input: the offset times the gain (2 mV x 34 = 68 mV here).
* The output is slow to follow a fast input: 0.3 V/us slew rate and 0.7 MHz / gain bandwidth.
* An input-range warning: an input went above V+ - 1.5 V.
* The part is not simulated: TEPLM358.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/lm358-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 (TEPLM358.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\LM358_Demo\LM358_Demo.ino, select Arduino Uno and use Sketch > Export Compiled Binary.
Replace the simulation's .hex with the exported HEX. The sketch needs 5,864 bytes of flash and 402
bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: the gain-bandwidth, the open-loop gain, the slew rate, the offset, the bias currents, the
output swing limits, the input range as
a warning, the supply current, two independent amplifiers.
Not modelled: the output current limit (over 40 mA is reported, not limited), the output's weak sink
near ground (30 uA at 200 mV),
crossover distortion, noise, the common-mode and supply rejection, temperature drift.

VERSION
TEP LM358 library V1.0 (Nov 2026). Device LM358TEP (TEPLM358.LIB / TEPLM358.DLL). Demo sketch
LM358_Demo V1.0. Demo board: ARDUINO UNO V4.0 (TEP Arduino Library V4.0) with its built-in serial
monitor.