1. Introduction
The T238 V1.9 Basic V2 Programmable MOSFET is an advanced Digital Trigger Unit (DTU) designed for AIRSOFT and Gel Ball Blaster V2 Gearboxes. It integrates a high-speed processor and two high-power MOSFET chips to offer a range of individualized programmable functions. This system enhances the stability, response speed, and overall durability of your gearbox.
2. Critical Notices and Safety Warnings
Please read and adhere to the following critical notices to prevent damage to the DTU and ensure safe operation:
- Reverse battery polarity is prohibited: Connecting the battery with reverse polarity will cause permanent damage to the DTU.
- PCB modification is prohibited: Any unauthorized modification to the Printed Circuit Board (PCB) will result in permanent DTU damage.
- Spring Compatibility: Use springs below M150. If using M150+ springs, a high-torque motor is required.
- Motor Security: Always secure the motor during testing to prevent accidental activation and potential injury.
3. Key Features and Functions
The T238 V1.9 Basic V2 DTU offers a comprehensive suite of features to enhance your airsoft or gel blaster experience:
- Battery Compatibility: Supports up to 11.1V batteries.
- Binary Trigger: Allows for a unique firing mode where the blaster fires once when the trigger is pulled and once again when it is released.
- Block-up Protection: Automatically detects gearbox block-ups, stops operation, and emits an elongated 'beep' sound to alert the user.
- Auto-loading Function: Designed for gel ball blaster magazines with internal motors. When a magazine is changed, the magazine motor automatically runs for 0.5 seconds to ensure proper feeding.
- Increased Rate of Fire: This module can increase the rate of fire and improve the stability of single-shot firing.
- Enhanced Battery Durability: Optimizes power usage for longer battery life.
- Active Braking: Utilizes the motor's inertia to stop the piston without delay, preventing over-spin of gears. This feature is particularly effective with high-torque motors.
- Gear Over-rotation Prevention: Prevents gears from over-spinning, resolving issues of multiple shots under high voltage and ensuring the spring is fully released in semi-auto mode, thereby increasing the lifespan of the gearbox and its components.
- ETU Overheat Protection: If the DTU overheats, the motor will emit a beep prompt after the trigger is pulled, and the system will automatically restart once cooled down.
4. Technical Specifications
| Specification | Value |
|---|---|
| Dimensions | 45mm x 30mm x 14mm |
| Operating Voltage | 6V - 16.8V |
| Start Current (Max) | 300A |
| Brake Current (Max) | 100A |
| Magazine Current (Max) | 30A |
| Gearbox Compatibility | Standard V2 Gearboxes (M4/AR Series compatible) |
| Material | PCB |
| Is Electric | No Battery |
| Batteries Included | No |
| Recommended Age | 14+ years |
| Certification | CE |
5. Installation Guide
WARNING: This product requires soldering and wiring. It is highly recommended that installation is undertaken by an experienced technician to avoid damage to the unit or the gearbox.
5.1. Choosing Your Wiring Style
The V2 Basic DTU is available in both front-wire and rear-wire versions. The front-wire version features flat connectors for easy T-dean disconnection, allowing wires to pass through narrow spaces within the gearbox.
5.2. Wiring and Component Placement
- Ensure all connections are secure and properly insulated.
- The DTU uses high-temperature resistant Teflon wire (18AWG diameter) for durability and ease of routing through gearbox wire channels.
- The DTU is designed for universal fit with standard V2 gearboxes, though minor modifications to the gearbox shell may be required for optimal fitment.
6. Operation and Programming
6.1. Firing Modes
The T238 V1.9 Basic V2 DTU supports multiple firing modes, which can be quickly switched via trigger programming:
- Semi-auto: Standard single-shot firing.
- Full-auto: Continuous firing while the trigger is held.
- Binary Trigger Mode: Fires once when the trigger is pulled AND once when it is released. To activate, put the selector in semi-auto position, then pull and hold the trigger for 3 seconds.
- Paintball Mode: Single shot at low trigger frequency, automatically switches to binary mode at high trigger frequency.
6.2. Auto-loading Function (Gel Ball Blasters)
For gel ball blasters equipped with magazines that have internal motors, the auto-loading function ensures consistent feeding. When you change the magazine, the magazine motor will automatically run for 0.5 seconds.
7. Smart Protection Systems
The T238 DTU incorporates several safeguard technologies to protect your blaster and the unit itself:
- Motor Short Circuit Protection: Automatically cuts off power during short circuits, indicated by a fast-flashing LED.
- Gear Block-up Protection: Real-time gear monitoring with optical sensors. If a block-up occurs, the system emits a long "Beep~" and cuts motor power.
- Battery Over-Discharge Protection: Emits a "Beep! Beep! Beep! Beep!" alarm via the motor when battery voltage is low, then enters sleep mode to prevent over-discharge.
- MOSFET Overheat Protection: As described in Section 3, the motor will beep if the DTU overheats, and operation will resume after cooling.
- Low-voltage Protection: Integrated into the battery over-discharge protection.
8. User Tips
- Gear Detection: The DTU uses optical sensors to detect gear position. No special preparation like painting gears is typically required.
- Wiring Options: Remember to choose the correct DTU version (front-wire or rear-wire) based on your blaster's internal layout and battery placement.
- Programming Method: For the Basic V2 model, all programming is done through trigger manipulation. This model does not support Bluetooth or PC-based configuration.
9. Troubleshooting
- Gearbox Block-up: If the system stops and emits a long 'beep', immediately power off the blaster and inspect the gearbox for any obstructions or mechanical issues.
- Low Battery Warning: If the motor emits a series of 'beep' sounds, your battery voltage is low. Recharge or replace the battery.
- Overheating: If the motor beeps after a trigger pull, the DTU is overheated. Allow the unit to cool down before resuming operation.
- Only Firing Full-Auto: If your blaster is unexpectedly firing only in full-auto, review the trigger programming steps for your desired firing mode (e.g., binary, semi-auto) and re-program the unit. Ensure the selector switch is in the correct position for the mode you are attempting to set.
- No Power/No Response: Double-check all wiring connections for proper soldering and insulation. Verify battery charge and polarity.
10. Package Contents
Your T238 V1.9 Basic V2 DTU package includes:
- T238 DTU BASIC Unit x1
- Accessories Package x1
- T238 Sticker x1
- Product Manual x1
11. Warranty and Support
For warranty information, technical support, or further assistance, please contact the official T238 support channels or your retailer. Keep your proof of purchase for any warranty claims.
