GP2Y0A41SK0F Sensor distancia analogico 4-30cm

GP2Y0A41SK0F Sensor distancia analogico 4-30cm

Overview

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 4 cm to 30 cm (1.5″ to 12″); a plot of distance versus output voltage is shown below.

This product replaces the original GP2D120XJ00F. The newer GP2Y0A41SK0F has a much higher update rate and much lower average current draw than the older GP2D120, but it is otherwise identical to the GP2D120 and can be used as a drop-in replacement for those modules.

Feature summary

• operating voltage: 4.5 V to 5.5 V
• average current consumption: 12 mA (typical)
• distance measuring range: 4 cm to 30 cm (1.5″ to 12″)
• output type: analog voltage
• output voltage differential over distance range: 2.3 V (typical)
• update period: 16 ± 4 ms
• package size: 29.5 × 13.0 × 13.5 mm (1.16″ × 0.5″ × 0.53″)
• weight: 3.5 g (0.12 oz)

Linearizing the output

The relationship between the sensor’s output voltage and the inverse of the measured distance is approximately linear over the sensor’s usable range. The GP2Y0A41SK0F datasheet (1MB pdf) contains a plot of analog output voltage as a function of the inverse of distance to a reflective object. You can use this plot to convert the sensor output voltage to an approximate distance by constructing a best-fit line that relates the inverse of the output voltage (V) to distance (cm).

Note: The GP2Y0A41SK0F model is a lead-free (RoHS-compliant) version of the Sharp GP2Y0A41 Distance Sensor. The manufacturer recommends you insert a bypass capacitor of 10 uF or more between Vcc and GND near this sensor to stabilize your power supply line.