Jeeps are synonymous with carefree, go-anywhere, four-wheeled adventure, with or without the top down. To many owners, these are fun weekend toys that, as luck would have it, can also be driven to ...

I was planning to use the opto-coupler speed sensor as part of a motor speed control – making the motor into the VCO block in a phase-locked loop. When this technique works, using it is simple: put ...