Sunday, February 24, 2008
Dyslexia and the MC14069UB chip
Things started nicely enough. I grafted a 14 pin socket onto the prototype board and isolated it from the 18F4550. Then I added another connection to the output pin that is the first of two pins going to the SN754410 quadruple half-H driver chip that controls the first phase of the stepper and connected it to one of the six inputs for the MC14069UB inverter chip.
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