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BMK E20 Motor & Band Burner Timer

Regular price £14.90

  US-Canada Customers! You can find this product on J&H Aerospace US

Ideal standalone motor timer and dethermalizer solution for E20 class models and other small electronic flight model build.

Simply, it's running two different timers on a single board. (motor run and DT band burner.)

Battery input and output connectors are JST 1.25mm for a solderless installation, but you can also remove them for a smaller footprint if you have a fine soldering iron.

2023-Black version extra features:

  • 10 seconds DT increments (previously it was 1s)
  • Motor break to reduce the spinning prop drag. 
  • Beeping (motor) to find the model in the long grass. 
  • Off-set Motor and Battery sockets for the stick batteries.
  • Thinner(1.2mm) lightweight circuit board.





You can keep the battery installed during the flight day or more.
The low-power electronics can wait in idle mode for 42 days (!!!) with a tiny 100mAh battery.

This image has an empty alt attribute; its file name is heater-1.png

The hand-winded unique Ni-Chrome heater will get red hot in a second with only a 1000mA current. You can also remove the heater and solder a DT motor.

Quality silicone elastic bands:

E20 Timer connection schematic


  • Weight:1.6g
  • Dimensions:31mm x 12mm x 5mm
  • Maximum Motor Timer Duration:60 seconds
  • Maximum DT Timer Duration:250 seconds (4 minutes 10 seconds)
  • Timer Steps: 1 second
  • Timer Tolerance: +-1% typical
  • Timer Activation Method: Hold the onboard button for at least 2 seconds, the timer will start when the button is released.
  • Timer Cancel Method: Click the onboard button
  • Motor Ramp: 0.3 seconds (1.0s until 10/09/2021)
  • Operation Voltage: 3.0 - 5.0v (compatible with 1S LiPo battery)
  • Power Consumption: 0.06mA @ idle / 0.6mA @ countdown / 1000mA @ burning(2 seconds).
  • Maximum Output Current: 5A continuous
  • Low Battery Warning: <3.7v (double flashes @ idle mode)