Introduction: Wearable Pulse Transmitter & Display
This instructable was created in fulfillment of the project requirement of the Makecourse-Art at the University of South Florida (www.makecourse-art.com). It is a Pulse sensor transmitting to a display station. This project was created by both Ricky Strawter and Jean Carlos Olivo
Materials used 5 Volt battery pack
3x solderless breadboards
Pulse Sensor Amped sensor
ebay 433mhz transmitter and receiver modules
3 arduino's (leonardo/uno's)
8x8 LED Matrix
3D printed enclosure
laser cut acrylic enclosure
hot glue gun
The altered Pulse Sensor Amped code for transmission can be seen and found here: https://github.com/JCinUSoF3/RFpulsSensor/tree/ma...
The Receiver and display code can be found here:
Step 1: Transmitter and Receiver Set Up
Assemble the transmitter and receiver modules making sure they are connected correctly to the positive and negative power supplies as well as pins for data both on the module end and on the Arduino end which is set within the code. ( note that modules require VirtualWire library).
Make sure the the transmitter and receiver are sending and receiving data by transmitting a string of text or any characters (note they will need an antenna soldered onto the modules both of which are pretty directional and distance sensitive).
Step 2: Pulse Sensor Setup
Once we have the transmitters working it's time to move on to the actual pulsesensor it's setup is pretty simple and the creators over at http://pulsesensor.com/products/pulse-sensor-amped have a much better getting started write ups and videos on setting up the sensor and having it run in no time.
Step 3: Combining the Pulse Sensor and Transmitter Receiver Modules
Once we are sure that both our transmitter and receiver are working as well as the Pulse sensor reading pulse data to it's respective arduino, we combine the transmitter and the pulse sensor in order to send the information over wirelessly towards the receiver module. The receiver module then takes this information and displays it on the arduino which it is connected to on an LCD display (in order to get the LCD to display the LiquidCrystal_I2C, and the Wire libraries must be downloaded and imported into the receiver's arduino code). Once we have everything assembled we want to check and make sure that the code and circuit are reading the pulse transmitting it, the receiver then receiving the pulse and displaying it on the screen.
Step 4: The Circuits Home
Once the Circuit is built and functioning it will need a home. For this we created a 3D printed mounting station for the display and receiving arduino. The design for the receiver mounting station was created in Maya and has both an industrial yet almost chess like design, created using multiple pegs and flared ends. A laser cut enclosure was created out of acrylic for the transmitter housing in order to keep the circuit together while on the wearer's person.
Step 5: Final Product
Once finished one is able to carry the transmitter within reasonably sized pocket and run the wires for the sensor either to the earlobe or to one's fingers. For our project we kept the transmitter in the pocket of a large jacket powered by a 5 V battery pack and made sure the antenna was out and visible by the receivers antenna( using rather haphazard hand sewing). In the end the small modules are rather sensitive and are very directional I have read in comments of other projects using these modules that they are able to achieve better gain and distance with a larger power supply but for the sake of this project and fear of frying either an arduino and or the transmitter we stuck with the arduino's power supply.