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BMK E20+ Timer with Integral RDT for Free Flight

Regular price £24.99

E20+ is a light-weight(1.4g) RDT/timer solution with DT and Brushed 4A motor outputs. 

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.

The onboard receiver is compatible with our BMK B1 transmitter which can be ordered as a bundle or sold separately. Each transmitter has its own unique code and you can connect a transmitter with an unlimited number of receivers.


E20+ is designed to work with coreless motors and 1S batteries. 

Package Content:

  • Timer Circuit Board




Max. Motor Timer Duration : 60 seconds (120 blinks @ 0.5s intervals)
Motor Timer Steps : 0.5s / 0.2s configurable
Max. DT Timer Duration : 1200 seconds/ 20 minutes (120 blinks) 
DT Timer Steps : 10 seconds increments
Timer Activation Method : Press the button for 2s(Arming), Release(Launch/Timer starts)
Timer Cancel Method : Click the onboard button
Timer Override : Click the BMK Remote B1 Transmitter Button
Working Frequency : 434 MHz
Input Sensitivity : -116dBm
Range : 2750m (calculated typical open field outdoor range)
Input Voltage : 3-6v (1S LiPo compatible)
Power Consumption : ~10mA @ Receiving
Low Battery Warning : <3.0v (double flashes instead of single)
Dimensions : 28mm x 12.5mm x 5mm
Weight : <1.5g



Questions and Trouble Shooting

  • Can I use an external button for the timer?
    Yes, just solder a button between the ext. button pads to extend the onboard button features.

  • The Transmitter LED is blinking fast.
    Replace the battery with a quality CR2032
  • The Transmitter is not working.
    Check the battery / Replace the battery