Project Files of MCP3008 8-Channel ADC Library for Proteus

MCP3008 8-CHANNEL ADC LIBRARY FOR PROTEUS - V1.0 (an MCP3008 8-channel 10-bit SPI ADC 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/mcp3008-8-channel-adc-library-for-proteus.html
Report a bug or suggest a feature (our forum):
  https://www.theengineeringprojects.com/forum/category/mcp3008-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
MCP3008-TEP-v1.0/
|-- Proteus Library Files/
|   |-- ArduinoV4TEP.LIB                              201.9 KB   TEP Arduino boards V4.0 (UNO) -> LIBRARY
|   |-- TEPMCP3008.LIB                                 14.3 KB   the library -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEPARDUINO.DLL                                883.5 KB   the Arduino board model -> MODELS folder
|   |-- TEPMCP3008.DLL                                298.5 KB   the model -> MODELS folder
|-- Proteus Simulation/
|   |-- MCP3008_Demo.hex                               16.8 KB   the demo firmware
|   |-- MCP3008-ADC-ArduinoUnoV4.pdsprj                19.1 KB   the demo project
|   |-- TEPARDUINO.DLL                                883.5 KB   copy of the board model
|   |-- TEPMCP3008.DLL                                298.5 KB   copy of the model
|-- Arduino Code/
|   |-- MCP3008_Demo/MCP3008_Demo.ino                   3.3 KB   the demo sketch (source of the .hex)
|-- README.txt                                        ~13.4 KB   this file
Total: 2.57 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
The MCP3008 8-channel 10-bit SPI A/D converter 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), CH0 - CH7 along the bottom, VDD
    VREF AGND CLK DOUT DIN CS DGND along
    the top, the pin names printed small inside the edges.
  * The converter as its datasheet gives it: code = 1024 x VIN / VREF (straight binary, 0 - 3FFh); 8
    single-ended inputs or 4
    pseudo-differential pairs (IN- within 100 mV of VSS; IN+ at or below IN- gives 000h); the SPI
    protocol - the start bit, SGL/DIFF,
    D2 D1 D0, the sample ending on the falling edge of the 5th clock after the start bit with a low
    null bit, B9 - B0 MSB first, then
    LSB first, then zeros; DOUT Hi-Z otherwise; CS high = standby; CS must go high once after
    power-up; the clock checked against 3.6 MHz
    at 5 V (1.35 MHz at 2.7 V); VREF 0.25 V - VDD.
  * Click it at Run for the pop-up: the eight inputs with their last codes, the last SPI transfer
    drawn bit by bit (CS, CLK, DIN, DOUT,
    the start bit, the control bits, the null bit and B9 - B0), the result.
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 "MCP3008" in Pick Devices):
  MCP3008TEP    "MCP3008 8-Channel ADC V1.0" in TEPMCP3008.LIB (Lab ICs > ADC), prefix U, model
  TEPMCP3008.DLL (mixed: CH0 - CH7, VDD,
                VREF, AGND, DGND analog; CLK, DIN, CS digital in; DOUT digital out). The PDIP-16
                pinout, 2.54 mm apart.

THE POP-UP
Click the part at Run. Tabs:
    ADC        the eight inputs as bars (0 - VREF) with their voltage and last single-ended code,
    the last SPI transfer drawn clock by
               clock, and eight live values: the last code, its input, VREF and the LSB, the SPI
               clock and its limit, VDD, the
               conversions, IN- and CS / SHDN.
    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 a little over two
    minutes on our PC (SPI mode 0 at 1 MHz).
  * The inputs (VREF = VDD = 5.000 V): the ladder gives 0.6772 V, 2.1182 V and 3.559 V. The first
    conversion, at 65.8 ms: single-ended CH0 =
    138 (08Ah), 0.6772 V, the clock measured at 1.00 MHz.
  * All eight single-ended: CH0 138, CH1 433, CH2 728, CH3 1023 (5 V), CH4 0, CH5 0 (D4 low), CH6
    433, CH7 0 - the sketch printed them as
    0.674, 2.114, 3.555, 4.995, 0, 0, 2.114, 0 V (code x 5 / 1024: the bottom of each code's step).
    With D4 high, CH5 read 1023.
  * Differential: CH6 - CH7 = 433 (IN- at 0 V); CH7 - CH6 = 0 (IN+ below IN-) - and the model warned
    that IN- was 2.118 V, outside its
    +/- 100 mV.
  * Speed: 1000 conversions of CH1 averaged 433.0, 41.8 us each = 23896 conversions per second
    (three SPI bytes at 1 MHz and the loop).
  * At 4 MHz: CH1 still read 433, and the model warned that the clock ran at 4.00 MHz, over the 3.60
    MHz limit at VDD 5 V.
  * Then D4 flipped every 250 ms and CH5 followed it, 0 and 1023. 1023 conversions in all. The
    pop-up: ADC (with the last transfer drawn bit
    by bit), 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" (TEPMCP3008.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 TEPMCP3008.DLL and TEPARDUINO.DLL from "Proteus Model Files" to the MODELS folder
(...\Proteus 8 Professional\MODELS).
4. Delete TEPMCP3008.IDX from the LIBRARY folder if it is there (Proteus makes a new index).
5. Start Proteus. In Pick Devices (P) search "MCP3008".

RUN THE DEMO
"Proteus Simulation\MCP3008-ADC-ArduinoUnoV4.pdsprj" (an A4 sheet) - keep the .hex file and the DLLs
beside the project.
  ARD1:   Arduino UNO V4.0 running MCP3008_Demo.hex, its serial monitor built in (window "TEP
  Arduino UNO - ARD1").
  U1:     the MCP3008: VDD and VREF on 5 V, AGND and DGND on GND; CS - D10, DIN - D11, DOUT - D12,
  CLK - D13.
  R1 - R4: 10 k, 10 k, 10 k, 4.7 k from 5 V to GND: 3.559 V (CH2), 2.118 V (CH1, CH6), 0.677 V
  (CH0); CH3 on 5 V, CH4 and CH7 on GND,
          CH5 on D4.
  1. The sketch reads all eight channels single-ended, then CH5 with D4 high; then CH6 - CH7 and CH7
  - CH6 (differential).
  2. It times 1000 conversions of CH1 at 1 MHz, then makes one conversion at 4 MHz (over the limit
  at 5 V).
  3. After a 3 s pause it flips D4 every 250 ms and prints CH5.
Closed the monitor? Click the UNO's USB port.

WIRING (the same in Proteus and on a real board)
  VDD: 2.7 - 5.5 V; VREF: 0.25 V - VDD (the range); AGND, DGND: ground; CS, DIN, DOUT, CLK: the SPI
  pins (D10, D11, D12, D13 on an UNO).
REAL HARDWARE:
 * Keep the SPI clock under 3.6 MHz at 5 V (1.35 MHz at 2.7 V): the sample has only 1.5 clocks to
   charge its 20 pF through 1 k.
 * High source resistances slow that charge: buffer high-impedance sensors or lower the clock.
 * A clean, separate VREF gives a cleaner result than a noisy 5 V; a lower VREF gives smaller steps
   for small signals.
 * CS must go high between conversions, and once after power-up.

THE DEMO SKETCH ON THE SERIAL MONITOR (MCP3008_Demo V1.0, 9600 baud)
There are no commands. The sketch reads, prints, then follows D4 on CH5.
EXPECTED MONITOR OUTPUT
  MCP3008 ADC - The Engineering Projects
  ch  code  volts
  1   433  2.114
  1000 reads of CH1: mean 433.0, 41.8 us each = 23896 per second

PROPERTIES (double-click the part > Edit Properties)
  Lowest supply (VMIN)                 the supply below which the Check page warns, V (2.7)
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 TEPMCP3008.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: VDD is missing or under 2 V.
* Every result 0 or garbage: CS never went high after power-up, the SPI mode is not 0,0 or 1,1, or
  MISO / MOSI are swapped.
* The codes are a little low or high: VREF is not what the sketch assumes - measure it.
* A differential result is 0: IN+ is at or below IN-, or IN- is the wrong channel of the pair (D0
  picks which is IN+).
* A clock warning: the SPI clock is over 3.6 MHz at 5 V - slow it down.
* The part is not simulated: TEPMCP3008.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/mcp3008-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 (TEPMCP3008.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\MCP3008_Demo\MCP3008_Demo.ino, select Arduino Uno and use Sketch > Export Compiled
Binary. Replace the simulation's .hex with the exported HEX. The sketch needs 6,118 bytes of flash
and 419 bytes of RAM.

MODEL SCOPE AND LIMITS
Modelled: the conversion (1024 x VIN / VREF), single-ended and pseudo-differential inputs, the whole
SPI protocol bit by bit (MSB first, LSB
first, zeros, Hi-Z), CS and standby, the clock limit and the IN- range as warnings, the supply and
reference currents.
Not modelled: INL / DNL and the offset and gain errors (all within 1 - 1.5 LSB), the sample
capacitor's charging through the source
resistance, noise; a too-fast clock is reported, not corrupted.

VERSION
TEP MCP3008 library V1.0 (Nov 2026). Device MCP3008TEP (TEPMCP3008.LIB / TEPMCP3008.DLL). Demo
sketch MCP3008_Demo V1.0. Demo board: ARDUINO UNO V4.0 (TEP Arduino Library V4.0) with its built-in
serial monitor.