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btw, I'm not that cheap and I beleive your pump is worth every penny but I'm in france and shipping + eventual custom fees will easily double the price...
Motor Driver BTS7960 43A
I'm a newbie with electronics, so my questions might be copletely out of place, but here they go:1) why two RISING events in one rev?2) why connecting the GND of the sensor to an I/O pin instead of the arduino's GND?Thanks!
Arduino-Based Optical Tachometer
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