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Welcome to 4QD – Electric Motor Control

Our passion is getting stuff working – model locomotives, golf carts, boats, and robots; industrial machines to DIY projects; we provide motor control solutions for almost anything with a battery and an electric motor.

  • We manufacture a range of  motor speed controllers and accessories for DC battery powered electric motors that are tough, reliable, and easy to use.
  • We provide the support you need to get your project up and running.
  • Our range covers 0 to 300 Amps, 12 to 60 Volts, and can be used in a wide variety of applications.
  • Many of our original designs are still going strong after 20 years.
  • As well as our range of controllers and accessories, we have an extensive knowledge base with lots of technical support and background information.
  • We like talking to customers about their applications and would like to hear from you if you have a special project or ideas for new products.
  • All our controllers are made in the UK.