Quote:
Originally Posted by techhelpbb
PWM from parallel port and they all can be controlled by an old PC  |
I'd never heard of this, and a bit of web searches about the old centronics port leads me to think that the PC-side hardware was not made to support PWM; whether it would be possible to hack it with a tight loop that shut down the PC for any other purposes is probably hardware dependent. Has someone actually done this (using passive components, which was my meaning)?
Quote:
Originally Posted by techhelpbb
I am waiting for the single IC speed control module. It is coming. Just a chip with bolts on the top like an IGBT and an electrically isolated metal plate on the bottom.
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Heat dissipation is a big issue here, unless you're talking about replacing the spike rather than a speed controller. The amount of electrical isolation demanded by FIRST is also a steep challenge. I expect brush-less motors and controllers to be FRC legal before single-chip brushed motor speed controllers. I'm not holding my breath on either one.