This is the sensor hcsr04 datasheet: http://www.micropik.com/PDF/HCSR04.pdf vol = 5V; cur = 15mA; As Chad said if I will attach a resistor between the the sensor echo and BBB will perform the level shift accordingly.Thus, as I previously mention I have attached a 1kohm resistor between the sensor pin echo and BBB so I could convert the voltage to the BBB expected 3.3V, as far as my calculations showed with a 1KOHM resistor. But will be the sensor satisfied if I have plug it in the VDD_5V from the BBB?
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