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Limbs and Things

Limbs & Things is a Bristol based company that manufactures medical training products for healthcare professionals and students worldwide. The PROMPT Birthing Simulator is one of a number of Limbs & Things products which has been a huge success for the company since it was introduced back in 2006.

In 2013 Cubik Innovation were approached to investigate a redesign of the PROMPT system. The aim of the redesign was to remove the cabled umbilical connection to the control PC application, replacing it with a Bluetooth connection and to update the application software to run on multiple platforms.

Limbs and Things Logo

Using our proven 5 Phase process Cubik innovated the design to include the following features:

  • Force measurement using load cell technology
  • Internal Lithium power source
  • Contactless Inductive charging system
  • Bluetooth classic and Bluetooth LE communications to the host
  • Cross-platform control application (Developed in conjunction with our approved partner)
  • Boot-loadable baby firmware, user upgradable to future-proof the design
PROMPT 1 Wired Kit.

PROMPT 1 Wired Kit

PROMPT flex kit with iPad Application

PROMPT flex kit with iPad Application

In addition to the design of the baby electronics, embedded firmware, application software and charge dock, Cubik were also responsible for the development of the production test rigs for the electronics and the calibration software to allow the baby to be set up and calibrated in production.

During 2015 the PROMPT Flex Bluetooth system was released. Cubik delivered the electronic system ready to be fitted into enclosures and overmoulded into babies by Limbs & Things, as well as providing a contactless charging dock and application software to run on Windows, Android, iPad and MAC operating systems.

Following on from the success of the redesign, Cubik utilised its experience and knowledge of compliance testing to assist Limbs & Things with achieving CE and FCC marking for the PROMPT flex allowing sale in UK, EU and USA.

The in-house production department at Cubik are now active in the process of manufacturing and delivering electronic kits to Limbs & Things in batches of 100 ready for assembly into the molded baby.

Limbs and Things - Charging

Baby model in the charging dock

Limbs and Things In Action



Adrian Schmieder of HiETA commented: “Cubik’s quick turn-around of a functioning PCB has sped the delivery of the project and enabled me to focus on areas of the project in which HiETA has expertise.  The project is a great success and produced valuable information even from its first use.  I am very impressed with the support Cubik provided me throughout the project, from initial concept through to PCB delivery.  I will not hesitate to engage with them again as future PCB projects arise.”


Speaking about the collaboration between Inductosense and Cubik Innovation, Founder and CTO Dr Chenghuan Zhong (Bamboo) stated: "It was great working with the knowledgeable and experienced team at Cubik Innovation. They always provide full support as well as useful and thoughtful advice to us, helping us find solutions for really difficult problems."


Geoff Jones, Aquabar Inventor: "It was a pleasure to work with Cubik on our project. Paul and Sam understood the concept at one meeting, and produced a solution filling the brief within two weeks which has enabled us to find a potential partner. We will certainly use Cubik for our production units later in the year, Many thanks."

Plymouth University

Paul Davey, Associate Professor (SL) Plymouth University: "If you need a prototype developed to a high standard and on time you would be hard pushed to find someone better. They have highly trained, experienced engineers who get the job done."

Clean Energy Prospector Ltd

Damon Rand, Head Product Design: "Paul and the team have really helped us speed up the turnaround on our prototypes and assure the manufacturability of our designs. If you’re designing electronics in the South-West, then Cubik is a great choice for short-run manufacturing."