Please join my Facebook group for updates and your questions. https://www.facebook.com/groups/bmkfreeflight



BMK Band Burner e-Timer (Old version)

Regular price £9.90

⚠️ This is an older product.
Please click the link below for the updated version:

New Band Burner e-Timer – Micro JST Version

The Band Burner e-Timer is a lightweight electronic dethermaliser (D/T) solution for small model builds. It cuts a rubber band or string by heating a Ni-Chrome element after a set time, allowing control of rudders, elevators, or other movable parts.

*Note: Earlier versions (before summer 2023) had 1-second timer steps. Newer versions use 10-second intervals.

📄 Download Manual

Download the Band Burner Timer PDF manual. It includes wiring diagrams, usage tips, and settings instructions.

▶️ Demo Video

You can keep the battery installed during the day. The low-power electronics can remain in idle mode for up to 42 days with a 100mAh battery.

Ni-Chrome heater image

Hand-wound Ni-Chrome heater reaches red-hot in 1 second with just 1000mA current.

🔥 Firmware Update – 03 January 2022

Due to a shortage of high-current batteries, the firmware was adjusted to halve the heater current draw.

  • Now compatible with 80–100mAh protected LiPo batteries.
  • Heater remains hot enough for elastic bands, but glow may be reduced.
  • In extreme cold, performance may be affected.
  • If using an unprotected high-current battery, a solder bridge between the designated pads enables full-power mode automatically.

Solder pad location

Bridge the shown pads to enable high-current heating mode.

📦 Package Contents

  • Band Burner Timer Board
  • Straight and right-angle pin headers

🧪 Features

  • Weight: 0.73g
    (1.6g for the blue version before 22 March 2023)
  • Dimensions: 23mm x 11mm x 5mm
  • Max Timer Duration: 2500 seconds (approx. 41 minutes)
    (250s for older blue version)
  • Timer Steps: 10 seconds
    (1s on older versions)
  • Tolerance: ±1% typical
  • Activation: Hold button for 2 seconds, release to start
  • Cancel: Click button to stop timer
  • Voltage: 3.0–5.0V (1S LiPo compatible)
  • Power Use: 0.06mA idle / 0.6mA countdown / 1000mA burning
  • Max Output: 5A continuous
  • Low Battery Alert: <3.7V (double flash in idle)

🔗 Accessories

Recommended Silicone Bands:

Band burner schematic

Schematic showing typical timer connection and usage.