Adafruit will not be shipping orders Thanksgiving Day, Thursday November 22, 2018. Expedited orders placed after 11am ET Wednesday November 21 will go out Friday November 23. Sign In SHOP BLOG LEARN FORUMS 0 Items VIDEOS SENSORS / PROXIMITY / HC-SR04 ULTRASONIC SONAR DISTANCE SENSOR + 2 X 10K RESISTORS HC-SR04 Ultrasonic Sonar Distance Sensor + 2 x 10K resistors PRODUCT ID: 3942 OUT OF STOCK Please enter your details below and we will send you an email when this item is back in stock. You will only be emailed about this product! YOUR NAME YOUR EMAIL NOTIFY ME ADD TO WISHLIST DESCRIPTION TECHNICAL DETAILS DESCRIPTION If you're like me, you've dreamed of being a dolphin - smoothly gliding through the water. Using your echo-location abilities to detect tasty fish treats. Until genetic modifications catches up with our desires, we'll just have to make do with these handy HC-SR04 Ultrasonic Sonar Distance Sensors and a pair of flippers. These ubiquitous sensors are really common in robotics projects, but they can also be used for automation, interactive art and motion sensing. They work at about 2cm to 400cm away, but we think 10cm-250cm will get you the best results. These sensors are fast, fairly easy to use, and low cost. They do require powering from 5V for best results: connect GND (ground) and VCC to 5V power. While the Trig signal can be 3V or 5V, the 'return' Echo signal is 5V logic. For that reason, we include two 10K resistors, use these as a divider to convert the 5V logic level to a safe 2.5V that you can ready with your 3V device. You can use this sensor with Arduino, CircuitPython (for microcontrollers or Raspberry Pi) or MakeCode We carry a large variety of distance sensors here if this fellow isn't what you're looking for. New Products 9/19/18 Featuring Adafruit #NeoTrellis #RGB Driver #... TECHNICAL DETAILS Power & Logic Voltage: DC 5V Current during measurment: 15mA Ultrasonic Frequency: 40 KHz Measuring Angle: 15 Trigger Input Signal: 10uS high pulse Sensor dimensions (excluding header): 45.5 x 20 x 15.5mm Weight: 8.7g LEARN Distance Measurement with Ultrasound Using MakeCode on the Circuit Playground Express to measure distance with an HCSR04 ultrasound sensor. Jack-o-Theremin Make spooky, pumpkiny sounds this Halloween! MAY WE ALSO SUGGEST... Sharp GP2Y0D805Z0F Digital Distance Sensor with IR Distance Sensor Includes Cable (100cm- Adafruit APDS9960 Proximity, Light, RGB, and IR distance sensor includes cable (20cm-150cm) Maxbotix Ultrasonic Rangefinder - LV-EZ1 Adafruit VL53L0X Time of Flight Distance Sensor - IR distance sensor includes cable (10cm-80cm) Maxbotix Ultrasonic Rangefinder - LV-EZ0 Sharp GP2Y0D810Z0F Digital Distance Sensor with Adafruit VL6180X Time of Flight Distance Ranging VCNL4010 Proximity/Light sensor TFmini Infrared Time of Flight Distance Sensor DISTRIBUTORS CONTACT SUPPORT DISTRIBUTORS EDUCATORS EXPAND TO SEE DISTRIBUTORS "People who are really serious about software should make their own hardware" - Alan Kay JOBS FAQ SHIPPING & RETURNS TERMS OF SERVICE PRIVACY & LEGAL ABOUT US ENGINEERED IN NYC Adafruit (R) 4.6