This is an attachment for connecting to air compressor, for inflating tires. It has 1/4″ NPT connector commonly found on air compressor hose on one end, and Shrader valve air chuck on the other. Shrader valve is commonly found in the automotive tires and also most bicycles.
Warning: High pressure involved, use safety gear and use at your own risk. I regulate the compressor output pressure to no more than 80 psi. Do not leave attached to the pressure line.
Air leakage is a big issue in 3d prints, since there are micro channels in the layer lines. My earlier attempts to have 100% 3d printable part did not succeed because I tried using TPU and Filastic (90A shore hardness) to print the gaskets. In this design the gaskets are cut from old hotend silicon socks and seal very well. The plunger is printed at 0.05mm layer height to have extremely smooth surface. It slides with little effort and provides excellent air seal.
The overall housing is not sealed and will show small bubbles, when placed under water. It may be sealed with a brush on coat of polyurethane or runny epoxy. I didn’t bother with this, since that micro-leakage is of little concern when inflating tires.
This design also lacks a pressure gauge and a spring for returning the plunger back. I might add this in future – for now it is a quick and dirty functional prototype.
Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!
Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!
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8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.