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Inside a 4-stroke piston engine

(Tuesday, June 15th, 2010)

You certainly know the basic principles of the operation of a 4-stroke engine with its different phases:

  • piston going down to suck gas and air in
  • piston going up to compress the mixture
  • piston going down pushed by the explosion
  • piston going up to push burnt gas out of the cylinder

Let’s admire the actual operation filmed at ultra-high speed from inside the cylinder:


YouTube link

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Stepper motors, step-by-step

(Wednesday, October 15th, 2008)

Stepper motors are nearly everywhere. this is marvellous for happy hobbyists. Even better, you can find them (and extract them from) a large number of devices that are easy to hack like old floppy disk drives, hard discs. For those of you who would ike to know more and keep an eye on the technology, I suggest that followiung reading:

Source: Jason Striegel.

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