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Showing results for tags 'pneumatic compressor'.
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Not very special but worth mentioning I guess... I'm working on an automated coal load/unload station for a few Lego trains. There will be some pneumatics in the system and I wanted to build a compressor that supplies the compressed air. I've already done that by switching a compressor on after an x amount of switching of the pneumatic switches for an x amount of time. The disadvantage of this system is that a lot of times the pressure in the system is too low. A pressure regulated compressor is the answer! So I bought an NXT pressure sensor from Mindsensors and hooked it to an Arduino chip. The chip regulates the pressure in the system: the compressor is activated when the pressure drops below 30 PSI and is deactivated when the pressure reaches 40 PSI, so there's a hysteresis to prevent frequent on/off switching. The compressor has also a display that displays the current pressure in PSI in the system. The whole thing just needs a 12V or 9V power supply and that's it :)
