{"title":"HC-SR04 Ultrasonic Sensor Distance Measuring Module Ultra01+","handle":"hc-sr04-ultrasonic-sensor-distance-measuring-module-ultra01","url":"/products/hc-sr04-ultrasonic-sensor-distance-measuring-module-ultra01","description":"The HC-SR04 is a widely used ultrasonic distance sensor that provides non-contact measurement from 2 cm to 450 cm with up to 3 mm resolution. It uses a 40 kHz ultrasonic transducer pair — one transmitter and one receiver — to calculate distance based on the time-of-flight of a sound pulse.\n\nWith a simple 4-pin interface (VCC, Trig, Echo, GND), it is straightforward to integrate with Arduino, Raspberry Pi, and other microcontrollers. Send a 10 µs trigger pulse and measure the duration of the echo return to calculate distance.\n\nKey Features\n\n\n2–450 cm Range – Non-contact ultrasonic distance measurement\n\n3 mm Resolution – Accurate enough for most robotics and proximity applications\n\n15° Effective Angle – Focused detection beam\n\nSimple 4-Pin Interface – VCC, Trig, Echo, GND\n\nLow Power – 2 mA quiescent current at 5 V\n\n\nHow It Works\n\nApply a 10 µs high pulse to the Trig pin\nThe module sends eight 40 kHz ultrasonic pulses\nThe Echo pin goes high for the duration of the round-trip time\nDistance = (Echo pulse duration × 340 m/s) ÷ 2\n\n\nSpecifications\n\n\nOperating Voltage – 5 V DC\n\nQuiescent Current – 2 mA\n\nMeasuring Range – 2–450 cm\n\nResolution – 0.3 cm\n\nEffective Angle – 15°\n\nTrigger Pulse – 10 µs minimum\n\nOperating Frequency – 40 kHz\n\n\nPin Definition\n\n\nPin 1 – VCC (5 V)\n\nPin 2 – Trig (trigger pulse input)\n\nPin 3 – Echo (echo pulse output)\n\nPin 4 – GND\n\n\nIdeal For\n\nRobotics obstacle avoidance\nArduino and Raspberry Pi distance measurement projects\nLiquid level detection\nProximity sensing and object detection\n\n\nPackage Contents\n\n1× HC-SR04 Ultrasonic Sensor Module\n","vendor":"ElecFreaks","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":4434,"title":"Default Title","sku":"EF-EF03085","price":8.54,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":104,"option1":"Default Title"}]}