Thingiverse
FreeTouch: To reduce contact with shared surfaces by dantana
by Thingiverse
Last crawled date: 4 years, 6 months ago
Open-source of a "no-touch" device that was launched and funded on Kickstarter. Has a conductive core, which allows it to interact with resistive and capacitive-based devices (most modern touchscreens).
Freetouch is about keeping us safe. The CDC has reported reported that COVID19 can be detected on shared surfaces throughout the hospital, including door handles and bed frame rails. Freetouch limits your exposure to high-touch surfaces. Lightweight, affordable device to open doors, activate touch screens and use shared surfaces to help avoid contaminating your hands. Designed and manufactured in the USA.
We are not currently selling but encourage people to make and give them away. To make one, the body of the device should be printed with supports (but raft not required) using PLA. The conductive core should be printed using your preferred form of conductive PLA (we use Proto-Pasta conductive PLA). The recipe for conductive silicone is below (for the tip of the device). A mold for the tips is included in the models as well.
Conductive Silicone
Materials needed: (quantities will vary depending on amount of silicone used)
Silicone (Desired hardness 30A)
Carbon fibers
Isopropyl alcohol
Multimeter
Colorant (Silc_pig_Smooth-on)
Steps:
Place carbon fibers in small amount of alcohol to allow them to disperse and de-clump
Mix silicone Part A and Part B
Remove carbon fibers a pinch at a time and dab on paper towel to remove excess alcohol
a. Excessive alcohol will interrupt cure process so remove as much as possible
Add carbon fibers to silicone mix and mix well
After adding several “pinches” of carbon fiber, consistency of mixture will start to change
Measure resistance of mixture with multimeter
Continue to add carbon fibers, mixing thoroughly until desired resistance is achieved (for our purposed, it was <1000ohm)
Add colorant
Place silicone into desired mold shape and allow to cure.
Links to the website:https://freetouch.tech/
Link to the Kickstarter:https://www.kickstarter.com/projects/450366981/freetouch
Freetouch is about keeping us safe. The CDC has reported reported that COVID19 can be detected on shared surfaces throughout the hospital, including door handles and bed frame rails. Freetouch limits your exposure to high-touch surfaces. Lightweight, affordable device to open doors, activate touch screens and use shared surfaces to help avoid contaminating your hands. Designed and manufactured in the USA.
We are not currently selling but encourage people to make and give them away. To make one, the body of the device should be printed with supports (but raft not required) using PLA. The conductive core should be printed using your preferred form of conductive PLA (we use Proto-Pasta conductive PLA). The recipe for conductive silicone is below (for the tip of the device). A mold for the tips is included in the models as well.
Conductive Silicone
Materials needed: (quantities will vary depending on amount of silicone used)
Silicone (Desired hardness 30A)
Carbon fibers
Isopropyl alcohol
Multimeter
Colorant (Silc_pig_Smooth-on)
Steps:
Place carbon fibers in small amount of alcohol to allow them to disperse and de-clump
Mix silicone Part A and Part B
Remove carbon fibers a pinch at a time and dab on paper towel to remove excess alcohol
a. Excessive alcohol will interrupt cure process so remove as much as possible
Add carbon fibers to silicone mix and mix well
After adding several “pinches” of carbon fiber, consistency of mixture will start to change
Measure resistance of mixture with multimeter
Continue to add carbon fibers, mixing thoroughly until desired resistance is achieved (for our purposed, it was <1000ohm)
Add colorant
Place silicone into desired mold shape and allow to cure.
Links to the website:https://freetouch.tech/
Link to the Kickstarter:https://www.kickstarter.com/projects/450366981/freetouch