SGT Enochs shared on Thingiverse:
after building my smaller engine I found that I had a heating issue and a timing issue. This engine uses larger solenoids for heat dispersion and cooling fans mounted on each piston. as far as the timing issue I used a SENSOFOIL touch sensor with a bearing to give an infinite turn 360* position sensor.
I found this engine is so large that one computer power supply cannot run the engine without side effects…. The Arduino would reset randomly or the power supply would just cut off due to the safety circuits. After that trial and error I grabbed a 650w power supply just for the solenoids and the 450 for the cooling system, Arduino and relay shield.
the particular SENSOFOIL sensor I purchased wasn’t as strait forward as I had hoped. the sensor had offset reading breakpoints that required some interesting programming. After that hurdle it was exactly what a project like this needed. some of you may notice tape on the sensor… that is because the part I designed doesn’t apply enough pressure on the sensor for the top half to read 100% accurate every rotation. I’ll redesign the part later.
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!