Leo Woolcock Design

DMX Flappy

A simple projector blackout device for use with DMX lighting systems.



  • Simple and reliable moving shutter to prevent “projector black” ruining your Blackout.
  • Attach to a projector and control using your existing DMX lighting system.
  • Whole kit is black for minimum visibility onstage
  • Power the device from any USB port capable of supplying 1A or from a 110-240V AC source using the supplied adapter

Improvements since version 1

  • Data and Power lights are now more subtle
  • Servo is mounted internally – reduced noise especially if you cover the address and safety holes with tape
  • USB Cable is now separate from the unit, meaning easier replacement of cable in the event of damage

Kit contains

  • Main Unit
  • Aluminium Flap (Spares available – email me!)
  • 3KG 60cm Safety Bond
  • Micro USB Cable
  • 13A USB Adaptor

Technical Specification

  • Power Supply: 5V USB (or 100-240V AC using supplied adaptor)
  • Current Draw: MAX 750mA @5V (Typical < 100mA)
  • Control: DMX512 – fully Opto-Isolated
  • Device Length: 180mm
  • Device Width: 82mm
  • Device Height: 46mm
  • Device Weight: 265g
  • Flap Length: 270mm
  • Flap Width (Max): 120mm (scale drawing in user manual)
  • Flap Weight: 52g
  • Full Kit Shipping Weight: 575g

Download the user manual here


Normal delivery window is 2-3 days but I may be able to go faster – please email or call me if you need one quickly. I may also be working in London and able to arrange a local delivery.

Guarantee/Returns Policy

You have 14 Days from delivery to decide if the DMX flappy is not for you. You are entitled to return the device at your own cost and receive a full refund excluding postage. In the unlikely event that your DMX Flappy is faulty on arrival, please get in touch to arrange a replacement or refund ASAP.

After 14 days refunds will not be available but if your DMX flappy fails or suffers degraded performance within the first 12 months you are entitled to a free repair so long as the device has not been unreasonably damaged or stressed.


Only a few units remain, so to order please email leo@leo-woolcock.co.uk and I will let you know what is left! Thank you!

DMX Flappy 2 – Standard Kit – £165.00

Each order will be subject to a £5.50 Postage and packing charge.


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