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T238 Digital Trigger Unit (DTU) V2.0 Bluetooth Version Programmable MOSFET For Gel Ball V2 Gearbox

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T238 Digital Trigger Unit (DTU) V2.0 Bluetooth Version Programmable MOSFET For Gel Ball V2 Gearbox


The T238 digital trigger unit bluetooth version is a programmable MOSFET which can be programmed by smart phone via Bluetooth, specially designed for gel ball V2 gearboxes.

With a high-speed processor, 8 optical sensors and 2 high power MOSFET chips, this system has many individualized programmable functions, such as piston positioning, binary trigger, multiple-shot and so on. It also has the functions of battery low-voltage protection and gearbox block-up protection.

It can effectively improve the stability, shooting speed and response speed of gearbox, at the same time, it can completely eliminate the problem of gearbox single-shot becoming multiple-shot. The module uses a maximum of 12.6V batteries. Soldering and wiring are required.

Low battery voltage protection, the default setting is protection OFF. Change the battery when hearing '4~3~2~1' 4 beeps low voltage warning sound.

Block-up protection. When gearbox block-up occurs, the system stops working and emits an elongated '1~' beep. Please check the gearbox immediately by powering off.

Auto-loading function is designed for gel blaster magazines with motor inside, when changing the magazine, the magazine motor will run automatically for a period of time, and the length of time can be programmed by 9th option. This module is able to increase rate of fire, the stability of single-shot and make batteries have higher durability.

The energy that supports the active brake function comes from the inertia of the motor, stopping the piston without delay. The effect of active brake is significant on a high torque motor.

The active function prevents the over-spin of gears, this solves the issue that the single shot becomes multiple shot under high voltage. Meanwhile, the spring is fully released in semi-auto mode and parts in gearbox are not under strain, increasing the life cycle of the gearbox and parts.

The system includes multiple shooting modes, these modes can be selected by fire select switch.

The default position of the piston is adjustable in semi-auto mode. Pre-cocking function can be implemented, zero trigger delay.

Adjustable rate of fire, the gap between two single shots can be programmable, to achieve adjustable rate of fire.

When the DTU is overheated, after the trigger is pulled, the motor will give a beep prompt until it is automatically restarted after cooling.


Safe – This mode is completely the same as original safe mode. The trigger can be pulled but nothing happens. The default mode is safe, however this mode can be programmed to semi-auto, double stroke single shot, 3-round burst to 6-round burst.

Semi – The default mode is semi, however this mode can be programmed to semi-auto, double stroke single shot, 3-round burst to 6-round burst.

Auto – The default mode is full-auto, however this mode can be programmed to full-auto, 3-round burst, 6-round burst, or 9-round burst.


  • Operating voltage: 7.4 – 11.1v
  • Integrated Bluetooth wireless communication module
  • Programming via Bluetooth using smart phones
  • Free APP for Android
  • Active break tech & piston reset
  • Programmable auto-loading function
  • Multiple programmable shooting mode
  • Overheat protection
  • Maximum Inrush current is 240A, Maximum brake current is 100A
  • Compatible with various Standard V2 Gearbox
  • Pre-cocking control
  • Rate of fire control
  • Active braking effect control
  • Sensors monitor
  • DTU current, voltage and temperature report
  • Total shot count and power-on time count

Note: This product requires soldering and wiring. It is recommended that installation is undertaken by an experienced technician. Damage caused during installation by anyone other than an authorised ViperTac technician may void the warranty.


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