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PROMPT Flex Birthing Simulator

​Classic innovation of an existing product: From concept to production

Limbs & Things are a Bristol based company that develop and manufacture medical training products for healthcare professionals and students worldwide. In 2006, they launched the PROMPT Birthing Simulator which quickly became one of their most successful products.

The PROMPT is an anatomically correct simulator that replicates both normal and difficult birthing scenarios. Following its success, Limbs & Things were keen to develop the product further and approached Cubik for assistance with a redesign.

The main objectives of the redesign were to remove the cabled umbilical connection to the control PC application, replace it with a Bluetooth connection and update the application software to run on multiple platforms.

Using our standard 5 phase process, Cubik innovated the existing design to include a range of new 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.

In addition to redesigning the baby electronics, embedded firmware, application software and charge dock, Cubik developed test rigs for the electronics and calibration software. This meant that the electronics could be set up and calibrated during the manufacture process to ensure the customer received a system that was ready to be fitted into enclosures and over moulded into babies. We also provided a contactless charging dock and application software to run on Windows, Android, iPad and MAC operating systems.

Following the success of the redesign, we supported Limbs & Things through compliance testing to successfully achieve CE and FCC marking which allows them to sell the PROMPT Flex in the UK, EU and USA.

Our in-house production department continue to manufacture and deliver fully assembled electronic kits in batches of 100 ready to be moulded into the baby.

PROMPT 1 Wired Kit.
PROMPT 1 Wired Kit
PROMPT flex kit with iPad Application
PROMPT flex kit with iPad Application

Baby model in the charging dock

Cubik Innovation has extensive experience supporting products through a redesign. If you have got a product you would like to develop further, our team of experts can help.

Limbs and Things Logo




Electronic design
Embedded software
Application software
EMC testing
Safety testing (LvD)
CE marking
FCC Marking



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."