A prototype portable warming blanket operated from a battery. Built to allow a wheelchair-bound quadriplegic to control the temperature of his lower extremities while out in the New England chilly seasons! I adapted this from a half-functioning design created by MIT undergraduates as part of a assistive technologies hackathon.
See the full drawing on TinkerCAD.
- RFD22102 RFduino DIP - Arduino controller (I found it in my drawer of random Arduino stuff) (datasheet on Sparkfun)
- RFD22122 RGB LED / Button Shield - LED output (datasheet on Sparkfun)
- RFD22121 USB Shield - adapter for programming (datasheet on Sparkfun)
- LM2937ET-3.3 - voltage regulator to get from the 12V battery down to the 3.3 needed by the Arduino (datasheet from TI)
- MOSFET - transistor used as a switch to control the voltage level going from the battery to the blanket
- waterproof cables (adafruit)
- waterproof plastic enclosure (adafruit)
- lots of 22 guage wire
- 10k resistor - wired from the Gate to the Source on the MOSFET (as recommended by the spec sheet)
- 10uF capacitor - wired from the voltage regulator output to ground (as recommended by the spec sheet)
- 0.1uF capacitor - wired from the voltage regulator input to ground (as recommended by the spec sheet)
- push-button switch switch - a random one I found in my drawer that he could activate despite his limited hand mobility
- electric heating pad - 8 of these are inside the blanket; they create heat correspondin to the input voltage (on Adafruit)
Created by Rahul Bhargava and Alex Rosenberg.