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

By: Chris Bake

**Arduino Code**: [https://bitbucket.org/cbake6807/dualtripleseq/src/master/](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 IDE**: Ensure it is installed and updated to the latest version.
- **Encoder Library**: Install via the Arduino Library Manager.

###   


### 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 D5.
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.

#### 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

- **Pushbutton**: Quantity 1
- **10kΩ Resistor**: Quantity 1
- **Connecting Wires**

##### Hardware Connections

1. **Connect the Pushbutton**
    
    
    - Connect one terminal of the pushbutton to the Arduino's 5V pin.
    - Connect the other terminal of the pushbutton to digital pin 4 on the Arduino.
2. **Add a Pull-Down Resistor**
    
    
    - Connect a 10kΩ resistor between digital pin 4 and GND. This ensures that the pin reads LOW when the button is not pressed.

Summary of Connections

- **Pushbutton Terminal 1** → Arduino 5V
- **Pushbutton Terminal 2** → Arduino Pin 4
- **10kΩ Resistor** → Arduino Pin 4 and GND

#### 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

- **PulseCounter Arduino to Sequencer Arduino**
    
    
    - PulseCounter D5 (Input) ← Signal Generator
    - PulseCounter D9 (Output) → Sequencer D2 (Input)
- **Sequencer Arduino Outputs**
    
    
    - Sequencer D9 (Output) → Input to the first AND gate tree
    - Sequencer D10 (Output) → Input to the second AND gate tree

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

- **Shared Connections**
    - Both Arduinos' GND pins should be connected together to ensure a common ground.

### Gate Driver Chip Connections

#### IR2110PB Gate Driver Chip

1. **Power Connections**
    
    
    - VCC (Pin 3) → +12V REG
    - VSS (Pin 12) → GND
2. **Input Connections**
    
    
    - LIN (Pin 11) → Arduino PWM pin (as per script)
    - HIN (Pin 10) → Arduino PWM pin (as per script)
3. **Output Connections**
    
    
    - LO (Pin 1) → Gate of the IRFP460 MOSFET
    - HO (Pin 7) → Gate of the second IRFP460 MOSFET
    - VS (Pin 6) → Source of the high-side MOSFET
4. **Bootstrap Capacitor**
    
    
    - Connect a 0.1µF capacitor between VB (Pin 8) and VS (Pin 6).
5. **Other Components**
    
    
    - D2: Place a 1N4001 diode between VB (anode) and VCC (cathode).
    - R2: Connect a 10Ω resistor between LO and the gate of the MOSFET.

### 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

- **Resistor Tolerances**: The resistors can have a large tolerance. The 56Ω value is selected to preserve signal clarity. Any value ≤220Ω should be acceptable.
- **Merged Outputs**: The Arduino Channel Sequencer has 2 outputs shown merged due to Scheme-It limitations.

[![image-1719630807457.png](https://stanslegacy.com/uploads/images/gallery/2024-06/scaled-1680-/3tIVYmfAyboOM3bo-image-1719630807457.png)](https://stanslegacy.com/uploads/images/gallery/2024-06/3tIVYmfAyboOM3bo-image-1719630807457.png)