Slot Car Controllers, Spares and Accessories

Customer Reviews

Based on 26 reviews Write a review


BP II Analogue Transistor Slot Car Controller

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  • Regular price £68.00

BP II Transistor Controller


  • Transistor Drive and Transistor Brakes. Fully DC controller. 
  • POSITIVE or NEGATIVE track wiring. (Select option when ordering)
    When correctly wired:
    BLUE LED is for positive wiring. RED LED for negative wiring. 
  • Running current 3A. Maximum current 6A peaks.
  • For Club Racing , a UK standard plug is available. click here
  • For Scalextric and Ninco the 3.5mm Stereo Jack plug is fitted ready for use. 
  • For Carrera there is no plug fitted. Cable ends are left open to connect. 
  • Comes with 1m cable as shown in the images. 
  • 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
  • Adjustable trigger return spring tension
  • Single and double finger trigger supplied. (easy clip on change without tools)

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

    Speed Control:

    This is a Transistorised DC system. As the trigger is pulled, the DC voltage to the car progressively rises to increase the speed of the motor.

    When wired up correctly the BP II has power LED's to show that it is on. 
    For Positively wired tracks the BLUE LED will illuminate.
    For Negatively wired tracks the RED LED will illuminate. 


    Brake control:
    This is a Transistorised DC braking system. 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 brake you have selected. The useful feature of this design is 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, square blue pre-set potentiometer, on the board at the end of the trigger contact segments, 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.


    • Running current 3A. Maximum current 6A peaks.

    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)

    For wiring of various plugs click here


    • Once you feel a scratchy movement of the wiper fingers over the contacts, or can hear squeaking then it is advisable to clean them. 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.
    • Brake and Drive Transistor TO220      click here
      Chose the polarity and transistor types to match your model. 
    • Sensitivity and Brake Pots                    click here
      Choose the value and style to match your model.
    • Replacement Cable                               click here 
      Choose the length and prepared ends
    • Trigger Sections                                   click here 
      Choose the full kit or just plastic parts


    Customer Reviews

    Based on 29 reviews
    Scott E Jordan
    Scott Jor

    This controller is absolutely fantastic very smooth trigger looks and feels very high quality would definitely recommend highly. The electrical components have got to be top shelf and I say this because I was not watching what I was doing got +pos -neg on power pack crossed up melted the wires and I was sure I cooked the controller. I hooked the controller up checked all wiring DA and it WORKS GREAT even after I shorted it out. Thank you TRUSPEED for building very high quality equipment at a very very good price. I would definitely recommend. Have a great day.

    Hi Scott.
    It's encouraging for me to read such positive words.
    Thanks very much for sharing your review.



    Very good and easy controller to use. Can't ask for any more.

    Thanks for sharing your review Patrick.



    Rick Moore
    Best Value for money HO Scale Controller

    I purchased one through Show Us Ya Slotz in Australia following some good word-of-mouth reviews within our social HO scale racing community. This is the best value for money, HO Scale suitable controller on the market imo. I have since gone on to refer several customers to purchase this product from SUYS.

    HI Rick.
    Thanks for taking the time to write your review from all the way over in Australia.
    Mike from Show Us Ya Slotz will be pleased to see it too, so I'll pass it on to him.


    Byron MacDonald
    Excellent value and quality controller.

    I purchased this to have a second transistorized controller for my track. In comparison to the stock or Professor Motor resistor controllers, this is at a completely different level and cost about the same price as the PM controllers in Canada. I wish I had purchased one of these earlier and saved myself a lot of money over my other controller. I highly recommend these for a completely different level of racing and enjoyment. The quality is also top notch. I make electronic components regularly, and the quality of this controller is obvious in its feel and performance.

    Hi Byron.
    Thanks very much for taking the time write your review.
    I am so glad that the BP II is working well for you.