HY-SRF05 Ultrasonic Range Finder

The HY-SRF05 is a five-pin ultrasonic distance sensor module. It measures distance without contact by timing how long an ultrasonic pulse takes to reach an obstacle and return. It can be wired with separate trigger and echo pins, like the SRF04, or in a single-pin mode where one pin handles both.

Specifications

• Supply voltage: 4.5–5.5 V DC
• Current: 10–40 mA
• Measuring range: 2 cm to 400 cm
• Accuracy: up to 3 mm
• Sensing angle: up to 15°
• Output: 5 V high / 0 V low
• Operating temperature: −20 °C to +60 °C
• Dimensions: 45 x 20.5 x 18.9 mm
• Weight: 8.9 g

Pins and modes

• Pins: VCC, Trig, Echo, OUT, GND
• Mode pin left unconnected: separate trigger and echo pins, as on the SRF04
• Mode pin connected to GND: a single pin is used for both trigger and echo