Project Files of 74HC595 Shift Register Library for Proteus Simulation

74HC595 SHIFT REGISTER LIBRARY FOR PROTEUS - V1.0 (a 74HC595 with a pop-up, for Proteus simulation)
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/2026/11/74hc595-shift-register-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/74hc595-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
74HC595-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEPHC595.LIB                                   14.5 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
|   |-- TEPHC595.DLL                                  300.5 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/
|   |-- 74HC595-LEDs-ArduinoUnoV4.pdsprj               24.1 KB   the demo project
|   |-- HC595_Demo.hex                                 12.1 KB   the demo firmware
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPHC595.DLL                                  300.5 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/
|   |-- HC595_Demo/HC595_Demo.ino                       2.5 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~13.1 KB   this file
Total: 4.07 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
The 74HC595 8-bit shift register with output latches as the PDIP-16 chip itself, drawn at true scale
(19.3 x 6.35 mm) - our own drawing:
  * The black body on its side (the notch left, pin 1 bottom left): QB - QH and GND along the
    bottom, VCC QA SER OE RCLK SRCLK SRCLR QH'
    along the top, the pin names printed small inside (OE and SRCLR with their bars; QH' is the pin
    QHP in the netlist).
  * The chip as TI's datasheet gives the SN74HC595: SER shifts in on each SRCLK rise (QA first, on
    to QH and QH'), RCLK copies the shift
    register to the storage register (as it was before a shift on the same edge), OE low drives QA -
    QH, OE high floats them, SRCLR low
    clears the shift register; the outputs as CMOS drivers (30 ohm: 4.3 V at -6 mA from 4.5 V), QH'
    45 ohm; the timing checked (25 ns
    setup, 19 ns SRCLK before RCLK, 5 / 25 / 29 MHz at 2 / 4.5 / 6 V); 35 mA per output and 70 mA
    through VCC reported; 2 - 6 V.
  * Click it at Run for the pop-up: both registers, the eight outputs with their volts and
    milliamps, the last 24 clocks with SER and the
    latches.
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 "74HC595" in Pick Devices):
  SN74HC595TEP  "74HC595 Shift Register V1.0" in TEPHC595.LIB (Lab ICs > Logic), prefix U, model
  TEPHC595.DLL (mixed: SER SRCLK RCLK
                SRCLR OE digital, the outputs analog). The name starts with SN so that it sorts
                after the embedded ARDUINO UNO V4.0.
The demo also uses our Resistor and 5 mm LED parts (their LIBs and DLLs are in this package).

THE POP-UP
Click the part at Run. Tabs:
    Registers  the shift register (SER in, QH' out), the storage register, the eight outputs as
    lamps with volts and milliamps, the last
               24 SRCLK rises with the SER bit of each and the RCLK rises, 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 9.5 simulated seconds in about three minutes
    on our PC (the pop-up open).
  * shiftOut(): the walking bit latched 0x01, 0x02, 0x04 ... at 65.6, 165.8, 265.9 ms; then 0xA5 =
    10100101 (QA, QC, QF, QH on): the sketch
    timed the byte and its latch at 144 us; the pop-up measured the shift clock at 0.065 MHz (65
    kHz). Each lit LED: 8.9 mA, its output
    at 4.73 V (30 ohm drivers); 35.5 mA through VCC with four on.
  * SPI at 4 MHz: 0x3C = 00111100 in 20 us (the sketch), the clock measured at 4.000 MHz (26 MHz
    allowed at 5 V); all timing in spec.
  * 0xFF: eight LEDs on, each output 4.73 V and 8.9 mA - 71.1 mA through VCC, over the 70 mA
    absolute limit: logged, the banner orange.
  * OE: a PWM on OE (75 % high) dimmed all eight; OE high floated QA - QH (the register kept 0xFF; 8
    uA through VCC); OE low lit them again.
  * Knight Rider by SPI: 280 shifts and 35 latches by 9.5 s; one LED at a time, 8.9 mA.
  * The pop-up: Registers (the shift and storage registers, the outputs with volts and milliamps,
    the last 24 clocks with SER and the
    latches), 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" (TEPHC595.LIB, TEPRESISTOR.LIB, TEPLED5MM.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 TEPHC595.DLL, TEPRESISTOR.DLL, TEPLED5MM.DLL and TEPARDUINO.DLL from "Proteus Model Files"
to the MODELS folder (...\Proteus 8 Professional\MODELS).
4. Delete TEPHC595.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "74HC595".

RUN THE DEMO
"Proteus Simulation\74HC595-LEDs-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file and the
DLLs beside the project.
  ARD1:   Arduino UNO V4.0 running HC595_Demo.hex, its serial monitor built in (window "TEP Arduino
  UNO - ARD1").
  U1:     the 74HC595 on 5 V: SER = D11, SRCLK = D13, RCLK = D10, OE = D9, SRCLR = 5 V (the UNO's
  SPI pins MOSI, SCK, SS).
  R1 - R8 330 ohm and D1 - D8 red 5 mm LEDs on QA - QH.
  1. shiftOut(): a walking bit, then 0xA5, timed. 2. SPI at 4 MHz: 0x3C, timed. 3. 0xFF: all eight
  on.
  4. OE: a PWM dims them all, then OE high turns them off without losing the byte. Then a light runs
  back and forth by SPI.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  VCC 2 - 6 V; GND; SER, SRCLK, RCLK to three MCU pins (or the SPI pins); OE to GND (or a PWM pin);
  SRCLR to VCC; QA - QH to the loads
  through resistors; QH' to the next 74HC595's SER for 16 bits and more.
REAL HARDWARE:
 * Each output may carry 35 mA at most, and all of them together 70 mA through VCC or GND: eight
   LEDs at 9 mA is already the limit.
 * Tie SRCLR to VCC and OE to GND if you do not use them: open CMOS inputs are undefined.
 * Fit 100 nF across VCC and GND close to the chip.
 * For brighter LEDs or relays, drive a ULN2003 or transistors from the outputs.

THE DEMO SKETCH ON THE SERIAL MONITOR (HC595_Demo V1.0, 9600 baud)
There are no commands. The sketch shows shiftOut and SPI, all-on, OE, then runs the light.
EXPECTED MONITOR OUTPUT
  74HC595 Shift Register - TEP
  shiftOut 0xA5 = 10100101 in 144 us
  SPI 4 MHz 0x3C = 00111100 in 20 us
  0xFF: all eight LEDs on

PROPERTIES (double-click the part > Edit Properties)
  Output resistance (RON)              of QA - QH, ohm (30; QH' gets 1.5 x)
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 TEPHC595.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: VCC is under 1.5 V; a warning outside 2 - 6 V.
* No LED lights: OE is high or open - tie it to GND; or RCLK never rises after the shift.
* The bits come out reversed: shiftOut MSBFIRST puts the first bit on QH; use LSBFIRST for the
  opposite.
* Over 70 mA through VCC: too many LEDs on at once - larger resistors, or a driver.
* A setup warning: SER changed less than 25 ns before SRCLK rose.
* The part is not simulated: TEPHC595.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/74hc595-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 (TEPHC595.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\HC595_Demo\HC595_Demo.ino, select Arduino Uno and use Sketch > Export Compiled Binary.
Replace the simulation's .hex with the exported HEX. The sketch needs 4,392 bytes of flash and 409
bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: both registers, the latch order on shared edges, SRCLR, OE (floating outputs), QH', the
output resistance with real currents
and voltages, the current limits as warnings, the setup times and the clock limit by supply.
Not modelled: propagation delays (the outputs switch at the clock edge itself), the input thresholds
(Proteus' logic levels), the output
current limit itself, temperature.

VERSION
TEP 74HC595 library V1.0 (Nov 2026). Device SN74HC595TEP (TEPHC595.LIB / TEPHC595.DLL). Demo sketch
HC595_Demo V1.0. Demo board: ARDUINO UNO V4.0 (TEP Arduino Library V4.0) with its built-in serial
monitor.