Arduino / ESP32 Projects

ESP32 - Complex Waveform Generator V2

Setting Up The App

ESP32 Complex Waveform Generator - Arrangement for WROOM-32 or WROVER-E (DevKit-C)


PARTS Required
Installation Prerequisites

Install ESP Libraries in Arduino-IDE v2.0

ArduinoJson
ESP32Encoder
Step 1. Open Esp32Full.ino and set Wifi Credentials
// #### Change Me - Local Wifi Info ####
const char *SSID = "NETGEAR";
const char *PWD = "12345678";
Step 2. Configure free local LAN  IP address

Check your Router for more information

// #### CHANGE ME ####
// Set your Static IP address to a free IP in your local network
IPAddress local_IP(192, 168, 1, 8);
// Set your Gateway IP address
IPAddress gateway(192, 168, 1, 1);

IPAddress subnet(255, 255, 255, 0);
IPAddress primaryDNS(8, 8, 8, 8);   //optional
IPAddress secondaryDNS(8, 8, 4, 4); //optional
Step 3. Configure ESP_HOST in Javascript File

Edit `./assets/espwavegen.js` and set the IP address used in Step 2 above.

TODO: Make configurable in the web interface

Save and close the file

Step 3. Upload The code in `Esp32Full.ino`

Paste the code into your Arduino-IDE and upload it to your ESP32

Installing the ESP32 Board in Arduino IDE

Step 4. Access the WebApp in your Web Browser

Open Web Browser
Open `index.html` in the `WebApp` directory below this file

Interface is now displayed!

Step 5: Enjoy!!

Please post pics and videos of your waves, and let others know how achievable this is!


Screenshot from 2022-12-31 13-23-07.png


Need Amplification?

See: ESP32 - Complex Waveform Generator - Driver & Amplification

Esp32-Encoder-Setup (5).png



Additional Troubleshooting / Customization


Optional: Configure alternate Output Pins
// #### Output Pins ####
int pinChannel1 = 2;
int pinChannel2 = 4;
Optional: Adjust Encoder Pins if needed
int pulseCount_EncoderPIN1 = 14;
int pulseCount_EncoderPIN2 = 13;
int pulseWidth_EncoderPIN1 = 35;
int pulseWidth_EncoderPIN2 = 34;
int pulseSpace_EncoderPIN1 = 19;
int pulseSpace_EncoderPIN2 = 18;
int gate_freq_EncoderPIN1 = 22;
int gate_freq_EncoderPIN2 = 23;

int pulseWidthModifier_EncoderPIN1 = 27;
int pulseWidthModifier_EncoderPIN2 = 26;
int pulseSpaceModifier_EncoderPIN1 = 5;
int pulseSpaceModifier_EncoderPIN2 = 32;
int gateModifier_EncoderPIN1 = 25;
int gateModifier_EncoderPIN2 = 33;

ESP C+ Code

Git Repo: https://bitbucket.org/cbake6807/esp32-complex-waveform-generator/src/master/


Troubleshooting:

View the Console Log for errors in your browser while clicking the app's sliders buttons etc..

Look in the Network tab for red errors. 404 or  other. Sometimes the ESP  may drop or reject the connection on the first attempt. Just refresh the browser once or twice and it should resolve. 

Screenshot from 2022-08-06 13-24-55.png

https://www.browserstack.com/guide/inspect-element-in-chrome#:~:text=One%20of%20the%20easiest%20ways,%2C%20Sources%2C%20and%20other%20tools.

Confirm the ESP is a connected host in your network and was given the IP you specified

https://www.wikihow.com/See-Who-Is-Connected-to-Your-Wireless-Network

Code notes if internet connectivity isn't an option. Also, encoder wiring connections for this particular setup (Notepad++ document file type). Chris Bake ESP32 notes.txt

Notepad++ download: Notepad++

ESP32 - CWG Driver & Amplification

A dual channel, dual isolated power supply, pulse amplification for driving all VIC arrangements


schemeit-project(2).png

 

Esp32-Encoder-Setup (5).png

Arrangement favoring Particle Oscillation as an Energy Generator

Screenshot from 2022-12-24 20-09-21.png

Variation 2 - Ground  Bonded / "Forced" Uni-polar Operation

Screenshot from 2022-12-24 20-09-13.png


ESP32 - Complex Waveform Generator V3

Installing and Using the ESP32 Complex Waveform Generator V3 Application

Screenshot of web interface


image-1683400232715.png 342755495_606076878142350_7100434860017235921_n.png

Prerequisites

To use this application, you need to have the Arduino IDE installed on your computer. You can download the Arduino IDE from the official website: https://www.arduino.cc/en/software

  1. ESP32 Development Board: You'll need an ESP32 development board, such as the popular ESP32-DevKitC or ESP32-WROOM-32D. These boards typically come with Wi-Fi and Bluetooth capabilities and a variety of GPIO pins for interfacing with peripherals.

  2. Rotary Encoders: To adjust the waveform parameters, you will need a total of 7 rotary encoders. You can use KY-040 rotary encoder modules or any other type of incremental rotary encoder with built-in push buttons. Ensure that the rotary encoders you choose have a CLK, DT, and SW (push button) pinout.

  3. Breadboard and Jumper Wires: A breadboard and jumper wires are required to make the necessary connections between the ESP32 development board and the rotary encoders.

  4. Power Supply: You will need a power supply to power the ESP32 development board. This can be a USB power supply, a battery, or any other suitable power source that meets the board's voltage and current requirements, such an ATX Supply from a computer. 5VDC 1A minimum is recommended to prevent brownout conditions while interacting with a driver circuit.

  5. Oscilloscope (optional): To visualize the generated waveform, you can use an oscilloscope. Connect the output pins (channel1OutputPin and channel2OutputPin) from the ESP32 development board to the oscilloscope's input channels.

Installing required libraries

  1. ArduinoJson: To install the ArduinoJson library, follow these steps: a. Open the Arduino IDE. b. Click on Tools in the menu bar, then Manage Libraries. c. In the Library Manager window, search for "ArduinoJson" in the search bar. d. Find "ArduinoJson by Benoit Blanchon" in the search results and click on the Install button.

  2. ESP32Encoder: To install the ESP32Encoder library, follow these steps: a. Open the Arduino IDE. b. Click on Tools in the menu bar, then Manage Libraries. c. In the Library Manager window, search for "ESP32Encoder" in the search bar. d. Find "ESP32Encoder by Gil Mora" in the search results and click on the Install button.

Uploading the Application

  1. Download the source code for the ESP32 Complex Waveform Generator V3 application or copy it to a new file in the Arduino IDE.
  2. Connect the ESP32 development board to your computer using a USB cable.
  3. In the Arduino IDE, select the appropriate board and port under Tools > Board and Tools > Port.
  4. Click on the Upload button (right-facing arrow icon) in the Arduino IDE to compile and upload the application to the ESP32 development board.

Hardware Setup

  1. Wire the rotary encoders and other components according to the pin assignments defined in the source code.
    ESP32 Pin Encoder Connection Encoder Function
    14 Pulse Encoder CLK Pulse count
    13 Pulse Encoder DT Pulse count
    35 Width Encoder CLK Pulse width
    34 Width Encoder DT Pulse width
    19 Spacing Encoder CLK Pulse spacing
    18 Spacing Encoder DT Pulse spacing
    23 Off-time Encoder CLK Off-time
    22 Off-time Encoder DT Off-time
    27 Width Mod Encoder CLK Width modifier
    26 Width Mod Encoder DT Width modifier
    15 Spacing Mod Encoder CLK Spacing modifier
    32 Spacing Mod Encoder DT Spacing modifier
    33 Off-time Mod Encoder CLK Off-time modifier
    4
    		 Off-time Mod Encoder DT Off-time modifier
    2 Output Channel 1 Output waveform
    5 Output Channel 2 Output waveform
  2. Make sure the connections are secure and verify the CLK/DT pins for each encoder are wired correctly, and that each encoder turns in the correct direction relative to the respective parameter change.

Using the Application

  1. Power on the ESP32 development board.
  2. Use the rotary encoders to adjust the following parameters:
    • Pulse count
    • Pulse width
    • Pulse spacing
    • Off-time
    • Width modifier
    • Spacing modifier
    • Off-time modifier
  3. The application will generate a complex waveform based on the adjusted parameters.
  4. Connect the output pins (channel1OutputPin and channel2OutputPin) to an oscilloscope to visualize the generated waveform.
  5. Open the WebApp/index.html page in a browser.
  6. Fine-tune the parameters using the rotary encoders to achieve the desired waveform shape and characteristics.

Next Steps For Utilization

Troubleshooting

  1. If the waveform does not match the expected output, verify the wiring connections and ensure the rotary encoders are functioning correctly.
  2. If the application does not upload to the ESP32 development board, double-check the board and port selection in the Arduino IDE.
  3. If the rotary encoders behave unexpectedly (e.g., adjusting one parameter affects another), check the CLK/DT pin assignments and wiring.

  4. Click the PInout button to fetch the currently defined GPIO pins from the ESP32 directly and confirm they are wired correctly.

    image-1683400997931.png

For further assistance or to report any issues, contact the application's support team or refer to the community forums.

2 Arduino - Dual Channel - Triple AND Gate (Perfect Pulse Driver)

By: Chris Bake

Arduino Code: https://bitbucket.org/cbake6807/dualtripleseq/src/master/

Parts List

  1. External Signal Generator: 0-5Vppk output.
  2. Power Supply: ATX is ideal, providing +5V REG and +12V REG.
  3. 2N7000 Signal MOSFETs: Quantity 6.
  4. IRFP460 or Similar Power N-channel MOSFET: Quantity 2.
  5. 56Ω 1/8W Resistors: Quantity 10.
  6. 100Ω 1/2W Resistors: Quantity 2.
  7. 4.7kΩ Resistors: Quantity 2.
  8. 2N3906 PNP General Purpose Transistor: Quantity 2 (can be substituted with any general PNP transistor).
  9. IR2110PB Gate Driver Chip 14-pin: Quantity 2.
  10. Arduino Nano (or similar): Quantity 2 (must support hardware PCNT).
  11. Rotary Encoder: Quantity 1.

Software Requirements


Arduino Setup

Pulse Counter Arduino

  1. Upload Script

    • Open the Arduino IDE.
    • Connect the first Arduino (PulseCounter) to your PC.
    • Open PulseCounter.ino from the provided file.
    • Upload the script to the Arduino.

  2. Connect the Encoder

    • Connect the encoder's VCC to the Arduino's 5V pin.
    • Connect the encoder's GND to the Arduino's GND pin.
    • Connect the encoder's CLK and DT pins to two digital pins on the Arduino D2 and D3.
    • Connect the encoder's Button pin to D4.

  3. Verify Encoder Output

    • Open the Serial Monitor in the Arduino IDE.
    • Rotate the encoder and check the output to confirm it is functioning correctly.
const int outputPin = 9;
const int encoderPinA = 2;
const int encoderPinB = 3;
const int encoderSwitchPin = 4;
const int disableSwitchPin = 6;

Adding a Pushbutton for Sync Mode Toggle

To add a pushbutton to the Sequencer Arduino for toggling the sync mode, follow these instructions:

Parts Required
Hardware Connections

  1. Connect the Pushbuttons

    • NANO1 - D6 -> BUTTON -> GND
    • NANO2 - D4 -> BUTTON -> GND

Summary of Connections

Sequencer Arduino

  1. Upload Script
    • Disconnect the PulseCounter Arduino and connect the second Arduino (Sequencer) to your PC.
    • Open Sequencer.ino from the provided file.
    • Upload the script to the Arduino.

Pin Mapping and Connections

Connecting the Two Arduinos

Note: The schematic shows the outputs merged due to limitations, but there should be dual outputs from the sequencer, D9 and D10, each connecting to a separate AND gate tree.

Gate Driver Chip Connections

IR2110PB Gate Driver Chip

  1. Power Connections

    • VCC (Pin 3) → +12V REG
    • VSS (Pin  2, 10, 11, 15) → GND
    • VDD (Pin 9) +5V REG

  2. Input Connections

    • LIN (Pin 12) → Arduino PWM pin (as per script)

  3. Output Connections

    • LO (Pin 1) → Gate of the IRFP460 MOSFET

  4. Bootstrap Capacitor

    • Connect a 22µF and a 100nF capacitor near VDD (Pin 9) and Ground.
  5. No Connection
    1. Pin 6, 7 - NC

  6. Noise Filtering

    • R2: Connect a 10Ω resistor between LO and the gate of the MOSFET.
    • D2: Place a 1N4001 diode in parallel with the Resistor R2 in reverse direction for added noise filtering and protection.

Schematic Overview

Refer to the schematic image to visualize these connections. The IR2110PB gate driver chips control the IRFP460 MOSFETs, enabling high-power switching of the VIC (Voltage Intensifier Circuit) primaries.

Additional Notes


image-1719630807457.png