HC-SR04 Ultrasonic Sonar Distance
Sensor + 2 x 10K resistors
PRODUCT ID: 3942
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.
TECHNICAL DETAILS
Power & Logic Voltage: DC 5V
Current during measurment: 15mA
Ultrasonic Frequency: 40 KHz
Measuring Angle: 15º
Trigger Input Signal: 10uS high pulse
Sensor dimensions (excluding header): 45.5 x 20 x 15.5mm
Weight: 8.7g
https://www.adafruit.com/product/3942 10‐2‐18
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