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BMK Remote DT B1

Regular price £25.99

Tax included.

Remote DT B1 is the ultimate remote dethermalizer/timer for small free flight models. Not only for competition models, but for others that we do not want to lose, but also do not want to put an expensive and heavy DT system on them. It also works as a rubber to electric flight conversation system.


The Transmitter:

Matchbox size transmitter has a single button interface to activate or deactivate the receiver functions.
Each digital transmitter has its own transmission code and operates with a single CR2032 coin cell.

Tx Features

Working Frequency : 434 MHz
Output Power : +10dBm
Range : up to 2750m
Power Consumption : 35mA when the button pressed
Battery Life (CR2032) : >5 years when idle
Low Battery Warning : <2.5v (flashes 5 times when the button is pressed)
Dimensions : 35mm x 50mm x 15mm
Weight : 18g

The Receiver:

The tiny receiver has 9 different modes including Servo, Band Burner, E20 motor control functions.
The receiver is designed to work with a 1S LiPo battery but you can use any power supply between 3-9V.
The output is not regulated and same as the input voltage. Just make sure your output devices(servo, motor or band burner) can work at the battery voltage.

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Timer D/T Modes

1- Servo Toggle Servo travels from left to right when the timer countdown is completed or the Remote DT button is pressed. It travels back when the button is pressed again and so on. You can cancel the DT operation in mid-air if you are using a pushrod operated DT system.
* The Servo Toggle modes may not be suitable for the competitions because you have full control of the servo. Please consider Mode 3 or 4.
2- Servo Toggle - TRISTATE
Same as Mode.1 but the servo travels between 3 positions(left-centre-right) by the remote.
3- Servo Cycle
Ideal for the competition models. Servo travels from left to right for 2 seconds then returns to the arming position automatically.
4- Servo One Way
Ideal for the competition models. Servo travels from left to right with no return.
The onboard timer button click is required to return the arming position.

5- DT Motor - Band Burner Mode
Ideal for a lightweight setup. You can use a geared micro electric motors, hacked servo, band-burner etc.
The output will turn on for 2 seconds with the remote DT or the timer will do the job automatically when the countdown is complete. The remote DT process can be repeatable in case of a failed DT action.
Band burner board here
6- Electric Flight Motor (Timer> OFF, Remote DT> OFF) Competition mode
Ideal for E20 model competitions. The motor output will be turned on when the onboard button is released(hand lunch). You can turn it OFF with the remote or the timer will do the job automatically when the countdown is complete.
7- Electric Flight Motor (Timer> OFF, Remote DT> ON/OFF) Electric model fun mode
Ideal for E20 model fun flights. Same as Mode 6 but the remote can be on and off the motor whenever you like.
8- Electric Flight Motor + 2 Seconds Delay + Ramp (Timer> OFF, Remote DT> OFF) Indoor Competition mode
Ideal for indoor ROG/ROW (no push or hand-launch). 2 seconds after the onboard button is released, the engine starts smoothly. You can turn it OFF with the remote or the timer will do the job automatically when the countdown is complete.
9- Electric Flight Motor + 2 Seconds Delay + Ramp (Timer> OFF, Remote DT> ON/OFF) Indoor Fun mode
Ideal for indoor ROG/ROW (no push or hand-launch). Same as Mode 8 but the Remote DT can be on and off the motor whenever you like.

Rx Features

Max. Timer Duration : 42.5 minutes (2550 seconds)
Timer Steps : 10 seconds
Timer Activation Method : Hold the onboard button for at least 3 seconds, the timer will start when the button is released.
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 : 3-9v
Output Voltage : Same as the Input Voltage. Use compatible servo/motor/etc
Max. Output Current : 5A continuous, 20A pulsed
(electric motors must be filtered against back EMF)
Power Consumption : ~10mA @ Receiving
Low Battery Warning : <3.5v (double flashes instead of single)
Dimensions : 20mm x 16mm x 6mm
Weight : 2.7g

How To Bind a Receiver?

  • Press and hold the timer button before plugging the battery.
  • Plug the battery when holding the timer button, then release the button
  • The Receiver LED will flash continuously at 5Hz.
  • Click the Transmitter DT Button.
  • The Receiver LED will turn solid RED for 4 seconds to show the binding process completed successfully.
  • The receiver will reset automatically. Now you can remove the battery or use your timer.

How To Set the timer mode and the duration?

  • Press and hold the timer button before plugging the battery. (like the binding process above)
  • Plug the battery when holding the timer button, then release the button
  • The Receiver LED will flash continuously at 5Hz.
  • -- MODE SELECTION --
  • Press and hold the button and count the LED blinks for the mode number.
  • Release the button when you reach the desired mode.
  • The LED will fast flash 3 times when saving the mode setting.
  • You can continue for the duration setting or remove the battery if you don't want to change the timer duration. 
  • -- DURATION SETTING--
  • Press and hold the button and count the LED blinks.
  • Each Blink adds 1 second to the timer. For example, 30 flashes, means 30 seconds. (Yes, unfortunately, you must wait/count for 240 blinks for 4 minutes timer.)
  • Release the button when you reach the desired timer duration.
  • The LED will fast flash 3 times when saving the timer duration. Then stop blinking for 4 seconds
  • The receiver will reset automatically. Now you can remove the battery or use your timer.



 

Using Your Timer

  • -- SERVO START POSITION (for Mode 1,2,3,4)--
  • Short click the timer button and the servo will turn to the start position automatically.
    -- ARMING --
  • Press and hold the timer button for a second.
  • The LED will turn to solid RED to show successful arming.
    -- STARTING COUNTDOWN --
  • Release the button.
  • The LED will blink continuously until the countdown ends.
  • The motor will start running at modes 6 & 7. or after 2 seconds at modes 8 & 9.
  • You can cancel the countdown with a single button click.
  • Or overwrite with the remote DT button.


     

    Receiver Flowchart


    Questions and Trouble Shooting

    • The Receiver is not responding to the remote DT when the servo is attached.
      Unfortunately, your servo is not compatible with this timer. Some servos have a conflict with the receiver design and the receiver will not respond to the remote DT if that happens. Please try a different servo model.

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

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