Just how cold is it out there? This giant thermometer scarf is a fantastic entry-level wearables project. It’s sure to strike up conversations that move past the topic of weather.
The scarf is built around a FLORA, a Neopixel ring that represents the bulb, and a short length of Neopixels to show the temperature in Fahrenheit and Celsius. Temperature sensing is done with a poorly documented DHT11 that gave [caitlinsdad] the fits until he found Adafruit’s library for them.To make the scarf, [caitlinsdad] used a nice cozy micro-fleece. He built a pocket for the electronics and padded it with polyester fiber fill to diffuse the LEDs. This makes the lights blur and run together, resembling a mercury thermometer.
Once it was up and running, [caitlinsdad] figured out the temperature scale based on the DHT11 readings and marked it out on the scarf with a permanent marker. [caitlinsdad] has a few mods in mind for this project. For instance, it would be easy to add haptic feedback to keep you from being exposed for too long. Another wearable in the same spirit is this hat that has a sunblock reminder system.
Thanks for the tip, [PT].
I always like seeing wearable electronic projects, this one looks very cool! err warm?
is it C like in cm ?
size of what ???
C = Celcius
C stands for contradipole.
This is a specialized engineering unit aproximately equal to 1.5 Kelvin degrees per linear volume squared (IE VL^2×3+17)
17 is the cosmological constant introduced by einstein, to explain for how good coffee tastes.
You forgot to take atmospheric pressure into account though for all intents and purposes this should give you 1.01% accuracy over the range of VL > -10m^3 and VL < e^3! angstrom^3 which is enough I suppose..
Why would you need a scarf that goes up to 50C?
wouldn’t work here… it was < -20F on my drive into work this morning.
Obviously the scarf needs to tell you it’s 50C outside to prevent you from accidentally walking around with it when it’s too hot.
On a more serious note; it should be rather easy to adjust the scale.
Replace the DHT11 with a DHT22 and you can measure temperatures down to -40F, I believe it’s a drop in replacement. Use marker to draw an appropriate temp scale on scarf depending on your region and adjust code accordingly.