Description Reliable, high performance, high accuracy, blind area within 2cm Specification: Voltage：DC 3.3 – 5V (R2 version now is 3.3V-5V compatible) Current：less 2mA Sensing angle：Less than 15 degree Sensing distance： 2cm-450cm for 5V 2cm-400cm for 3.3V Accuracy：about 0.3cm PCB Dimension：4.5*2.0CM Connection: VCC, trig(Control), echo(Receive), Out, GND Working principle： Send high TTL signal at trigger IO. Module automatically send 8*40khz squre wave in order to detect if there are any signal return. when signal return, use each(receive) IO pin output high TTL, the output TTL time length is the time from sending till return. try to use this fomula: distance = (high TTL time* velocity of sound)/2 velocity of sound = 340m/s Buck order price 17% discount for 50pcs, auto update price in cart. Documentation: See more at this wiki page.
