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Aj Sr04m Datasheet InstantФорум поддержки программаторов "Tiny Tools" (USB-F / USB-SPI / EASY-NAND) |
| Предыдущее посещение: менее минуты назад | Текущее время: 09 мар 2026, 01:24 |
Why 58? Speed of sound ~343 m/s at 20°C → 1 cm travel = 29 µs round trip (out + back). So 1 µs = 1/29 cm? Wait, let's derive:
while GPIO.input(ECHO) == 0: pulse_start = time.time() while GPIO.input(ECHO) == 1: pulse_end = time.time() aj sr04m datasheet
: 20 cm (objects closer than this cannot be accurately measured). Resolution : Approximately 1 mm to 2 mm. Operating Frequency : 40 KHz. Measuring Angle : 75 degrees. Operating Modes Why 58
The is a rugged, waterproof ultrasonic ranging module often used as a more durable alternative to the popular HC-SR04. It features a separate waterproof probe connected by a cable, allowing the main control board to stay dry while the sensor works in harsh or wet environments. Core Specifications Wait, let's derive: while GPIO
AJ-SR04M is the best all-rounder for outdoor/wet applications needing short-range detection (2 cm blind zone). JSN-SR04T has longer range but larger blind zone (20 cm). HC-SR04 is indoor only.
For tank level sensing, ensure no obstructions inside the beam cone. For obstacle avoidance, mount multiple sensors to cover blind spots.
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