Week 10 – Limbs and Things Model – Emily, Thomas and Lukasz

How best to model the design?

The group took time to consider the best route to take when displaying the design without losing any features of the design. We did some initial sketches to try and visualise the thoughts we were generating.

Capture3Our first thoughts were to encase each design in a rectangle casing, like a box almost. On reflection, after chatting to it within the group and with the lecturers, we realised that if we were to model the design in this way would be would lose the realism regards the products from Limbs and Things.

Model Sketches


The sketch on the left shows how we were thinking of displaying the design on the plinth.

Key things we wanted –

Model speaks for itself

Neat wiring, however the Arduino on show

Display boards that were clear and concise





These are the quick sketches we draw to have an idea of how the parts will all come together. We went with a polystyrene semi – cylinder tube, as we thought it was more representative of the human arm / leg. Each sensor has a different ‘limb’, this therefore ensures that the person viewing the display or using one of the sensors, won’t get confused with what the input and outputs are.


After deciding on the polystyrene as the visual for the limb the student was assessing, we wanted to mount it in a position that again, was more realistic. Clear plastic piping allowed us to get the model in the position we wanted and to keep a crisp clean look. Some of the wiring could also be feed through the piping to keep it tidy. The plastic boxing at the front of the display is housing for the Arduino without the risk of wires being pulled lose or damage being done.



Last job to do is to place the circuit into the model.



By  Emily Mortimore, Thomas Elwes, Lukasz Staszewski


Week 9 – Limbs and Things Final Products – Thomas, Emily and Lukasz

Vibration Model Test:

Made sure the vibration module could detect the vibration of the plasters being removed from the model and that it would output the sound at the appropiate time (Sound for when the bandages are removed too slowly)


Pressure Model Test:

The pressure sensor should be able to detect the pressure applied to the surface, beneath the model. The servo attached should also react with the pressure and “twitch” the model visably.


Swipe Model Test:

The photoresistors should be open to light and be able to be swiped smoothly. There should not be any interferance either


All the codes combined to work on a single Arduino Uno:

Link to code



By ThomasElwes, Emily Mortimore and Lukasz Staszewski

Week 8 – Limbs and Things Sensor Testing – Thomas, Emily and Lukasz

Vibration sensor:

Plasters are meant to be remove quickly to prevent further pain to patent. Vibration sensors will be used to detect if plasters were removed correctly and efficiently, with the least pain possible (Vibrations made)



Vibration sensor needs to be tested with plasters/bandages to see if it reacts to the vibration of removing the plasters/bandages.

Pressure sensor:

If too much pressure is applied to a wound for too long this also causes more pain. Pressure sensor could be used for when pressure to a wound is applied to a wound and pain is exhibited by a servo shaking to represent the pain the patient is in.


Untitled Sketch 2_bb

The improvement for this code/circuit would be to add a servo to simulate twitching to represent the pain of the patient.

Wound cleaning:

Wounds are meant to be cleaned from the least messy part of the wound to the most to avoid any contamination or spread of bacteria. Having three photoresistors having to be swiped in the correct direction with a visual aid to say if the student did it correctly could help.

Button lock examples were investigated to help with this code. However, I found that the use of a “switchcase” “if “statements could prove more useful for this sensor.

First Code Attempt (Switch Case):


This code unfortunately didn’t agree with the Arduino circuit. The reason for its failure could be that it was waiting to too many values to become active so stayed in the same state.

Second Code Attempt (“if” Statements):


This code worked compared to the first attempt. Using similar parts of the first code, like the use of “checks”, “true” and using one “switchcase” at the end for the result instead of the entire code.


Swipe Circuit_bb

The main improvement would be to simplify and condense the code as well as adjust the sensitivity of the photoresistors by testing different resistors.

Blood Level Sensor:

Used to detect the level of blood and how much is lost. So using a liquid level sensor we could visualise what percentage of blood (liquid) is in the patient (model)



This code and circuit needs another way to visualise the loss of blood (e.g. LEDs? Sound?). Also, the display needs to be correct as it displays the levels in hundreds of per cent.




Smazara Uno Tutorials


By Thomas Elwes, Emily Mortimore and Lukasz Staszewski

Week 7 – Developing Limbs & Things – Emily, Thomas and Lukasz

Company Trip

After being given our briefs we had the option of either designing for a sustainable device or a device to be integrated into Limbs and Things products.

We looked at three different products which they thought we could apply our physical computing knowledge to.

Three training mannequins were ;

Abdominal Examination Trainer


Advanced Catheterisation Trainer


Clinical Pelvic Trainer




To continue down the ideas path we firstly decided what we wanted to sense. Things we listed to sense were; location, size, tissue damage, blood loss, fluid, pain, management through procedure. Sensors we thought of initially, that could be used for an input of those things were touch sensors, pressure sensors and water level sensor.

Things to look at –

Rusty Squid – tactile response

The Rusty Squid are a small group who work on projects involving robotics, computer programming, design and puppetry. The one that should out was there work in Bristol, they made a wall of books sense movement in the room and open/close the books depending on the audience. Very impressive to see and gave us an insight into things that can be done.


Processing is another open source software that combines visual graphics with technology, therefore within our design we could have an input from sensors run using the Arduino and then shown visually through graphics.

Daniel Shiffman

Daniel Shiffman – His youtube channel was very useful, he explores many different features and tricks using many different micro controllers. Whenever we are stuck on an element of something now, we can use his channel as a resource.

By  Emily Mortimore, Thomas Elwes, Lukasz Staszewski





Week 6 – Sustainability or Limbs and Things Project – Thomas, Emily, Lukasz

Sustainability Project Ideas:

-Developing on the Energy Idea (Energy – Have a monitor (LEDs) which says which room of the house uses the most energy (Traffic light system). A motion sensor is used within each room combined with the energy sensor to produce a rating for people in the room + Energy used.)

Consumption per household increased between 2015 and 2016 by 2.1 per cent

Consumption per person increased by 2.3 per cent from 2015 to 2016

From primary research of taking readings from a house to see the energy consumption from plugs in the walls.


-If energy usage is surpassed within a certain room the wifi within that room the connection would be reduced. One way to do this would be to use a Faraday cage. This would block the wifi signals entering the room, so the challenge would be to see if the faraday cage could be controlled to various levels to control wifi strength. However certain legalities arise with faraday cages with jamming devices being illegal. Yet faraday cages are legal, though preferably the phone signal shouldn’t be blocked in case of emergency


Limbs and Things Ideas:

Cancer Lump Detection – Having a sensor inside the models to represent cancer lumps, so that when they’re felt the lecturer can see if the student has diagnosed the lump correctly

Flex sensors – Could be used as an input if some body part is moved in the incorrect direction. Outputting a sound to indicate the patient is in pain

Load cells – Will detect the amount of pressure applied and can be used as an input. It could be used to be sure students don’t apply to much pressure to a certain area of the body, and a output of sound or movement could be implemented

Injections – If a needle must be injected into a part of the body a sensor can sense how deep the needles is going, to prevent any pain/discomfort – Touch sensor, Digital touch sensor







By Thomas Elwes, Emily Mortimore, Lukasz Staszewski

Week 4 – Exploring Ideas

Sustainable Design Ideas


To begin my thought process I created a mind map to find areas/ topics in which design ideas could stem from. As shown above some options for sustainability were surrounding the things we use most in a household that we should try to cut back on.


My first thought for reduction of water usage was having a tank within the bathroom which give the user a visual of how much water they were using during their shower period. This would hopefully encourage them to use as little amount of water as they could to say within the green zone. People relate much more to visuals than just being told they took 20 minutes in the shower.


The second idea was too help reduce waste through recycling. This product would work by the user bring something to the screen, it would scan the object and open the lid of the correct bin. This would stop people putting things that can be reduced into the general waste, and food waste too.


Electricity reduction I thought would be easiest done through lights in the house. Many people leave lights on for comfort around the house, even though they are only in one room for a large period of time. This system would therefore only allow a light to be on if there was movement below.


Lastly, to reduce water consumption, a system could be put in place so if a bath was run once, the same bath could be used again for other members of the family. The previous water would be filtered and heated back to temperature.


Week 5 – Sustainability or Limbs and Things Project – Thomas, Emily and Lukasz

Sustainability Project Ideas:

Water Meter – Attachments for your showers, taps and bath taps that measure how much water is used and visualise it for the users to see – Laser sensor, Moisture sensor, Liquid Level Sensor


Solar – A robot which moves to be in direct contact of the sunlight – Solar panels, Motors +Wheels


Energy – Have a monitor (LEDs) which says which room of the house uses the most energy (Traffic light system). A motion sensor is used within each room combined with the energy sensor to produce a rating for people in the room + Energy used.


Temperature – Sensor that stays outside to measure the temperature and humidity and suggests if the house should be heated or not – Temperature and humidity sensor module


Limbs and Things Ideas:

Movement – If a certain part of the body needs to be moved carefully without sudden movements a balance and/or motion sensor could set off an LED or sound when it something moves incorrectly – Balance meter, Movement Sensor

Injections – If a needle must be injected into a part of the body a sensor can sense how deep the needles is going, to prevent any pain/discomfort – Touch sensor, Metal touch sensor






By Thomas Elwes, Emily Mortimore and Lukasz Staszewski