Slot Car Controllers, Spares and Accessories

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BP II Transistor Slot Car Controller

  • Sale
  • Regular price £62.00

BP II 4.0  Transistor Controller


  • Not supplied with a plug. A UK standard plug is available. click here
  • For Scalextric and Ninco Plug click here
  • Scroll down for Wiring information under the Technical Tab
  • Brake adjustment (with automatic HOLD)
  • Sensitivity adjustment. (with automatic CURVE)
  • Additional Pre-set pot for sensitivity range adjustment on 2020 version. 
  • Adjustable trigger return spring tension
  • Single and double finger trigger supplied. (easy clip on change without tools)
  • POSITIVE or NEGATIVE track wiring. (Select option when ordering)
  • Running current 3A. Maximum current 6A peaks.
  • Suggested addition add-on Universal Full Power Relay

Simple intuitive controls on the BP II make it easy to use and quick to adapt to your racing style, car, and track conditions. See the Ecurie Raceways Blog  click here

    Quick Start Guide download

    Brake control:

    A single rotary control sets the braking strength and has a built-in hold circuit to release the brakes once the car has slowed to a speed relative to the amount of braking you have selected. The useful feature of this design is the that motor drives the brake circuit in such a way that the faster the car is going, the harder the brakes are applied. As the car slows, the brakes are gradually released to give very balanced and predictable control. The brake and hold remain balanced to leave you free to race confidently.

    Sensitivity control:

    This adjusts the trigger wiper sensitivity to enable you to set the controller feel for any car or track condition. 

    The small blue pre-set potentiometer on the board allows adjustment of the sensitivity range. Turn anticlockwise to decrease sensitivity.  

    Adjustable Spring Tension:

    Easy adjustment with a cross head screwdriver to set the spring tension. You will see the little tensioner cam moving to pre-tension the spring.

    Trigger single and double finger sections:

    The controller is supplied with the single finger section fitted and the double finger option in a little packet to fit as required. To see the details click here.


    Wiring Colours:

    Positive Wiring

    •   BROWN                (WHITE)    Power
      (Positive from Power Supply)
    •   BLUE                     (BLACK)   Output.
      (Power from the controller to the track)
    •   GREEN/YELLOW    (RED)       Brake.
      (Negative from Power Supply)

    Negative Wiring

    •   BROWN                (WHITE)    Power 
      (Negative from Power Supply)
    •   BLUE                     (BLACK)   Output. 
      (Power from the controller to the track)
    •   GREEN/YELLOW    (RED)       Brake. 
      (Positive from Power Supply)


    • Once you feel a scratchy operation or can hear squeaking then it is advisable to apply a small amount of switch cleaner/lubricant, lighter fluid, or something similar, onto a cotton bud and through the air flow slots in the casing, gently wipe over the contacts on the board. 
    • Be sure not to bend the cable at the exit of the handle. The wiring will break from metal fatigue after a while and cause intermittent operation. Wind the cable into a gentle coil as shown in the images and it will last.


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