Distance Sensor 10-80cm GP2Y0A21YK0F Sharp

Voltage: 4.5–5.5 V
Current: 30 mA typical
Range: 10–80 cm
Output: Analog voltage (~5 V)
Voltage Differential: ~1.9 V typical
Response Time: ~38 ms
Size: 29.5 × 13 × 13.5 mm
Weight: 3.5 g

The Sharp distance sensors are a popular choice for many projects that require accurate
distance measurements. This IR sensor is more economical than sonar rangefinders, yet it
provides much better performance than other IR alternatives. Interfacing to most
microcontrollers is straightforward: the single analog output can be connected to an
analog-to-digital converter for taking distance measurements, or the output can be
connected to a comparator for threshold detection. The detection range of this version is
approximately 10 cm to 80 cm (4" to 32"); a plot of distance versus output voltage is
shown below.

The GP2Y0A21 uses a 3-pin JST connector that connects to our 3-pin JST cable for
Sharp distance sensors (not included) as shown in the upper picture on the right. It is also
simple to solder three wires to the sensor where the connector pins are mounted (see the lower picture to the right). When looking at the
back, the three connections from left to right are power, ground, and the output signal.

Features:

Works with standard microcontroller systems for easy integration.
Provides reliable analog voltage output for smooth distance measurement.
Supports obstacle detection and navigation for robotics projects.
Offers fast response suitable for real-time applications.Compact and lightweight design ideal for space-constrained builds.
Compact and lightweight design ideal for space-constrained builds.