This module is an inexpensive solution for an obstacle avoidance sensor, perfect for robotic projects and very easy to interface directly with Arduino® and compatible boards. The module has two potentiometers, one to control frequency and one to control the intensity.
Specifications:

1. operating voltage: 3.3 V to 5 V
2. output: digital (on/off)
3. detection threshold: adjustable by 2 trimmers
4. distance range: 2 to 10 cm
5. adjustment R6: frequency adjustment 38 KHz (already optimised)
6. adjustment R5: IR LED power adjustment (already optimised)
7. operating temperature: -10°C to +50°C
8. effective angle: 35°
9. I/O interface: 4 wire interface (- / + / S / EN )
10. dimensions: 45 x 16 x 10 mm
11. weight: 9 g

vma330_a4v01.pdf

ky0038_datasheet.pdf

vma330_scheme.pdf

vma330_overview.pdf

vma330_example.zip

vma330_code.zip

ce_rohs_open.pdf