SRM400
Overview
The SRM400 is an ultrasonic sensor ranging module designed for proximity detection and distance measurement within a 25cm to 150cm range. It integrates a high-gain amplifier, a band-pass filter, and an adjustable system clock to simplify the implementation of ultrasonic pulse-echo systems.
Why Choose This Part
The module features an integrated variable RC oscillator and system clock, allowing for fine-tuned timing control without external clock sources. Its bi-directional I/O pin simplifies the interface requirements, while the built-in band-pass filter ensures high noise immunity in cluttered environments.
Applications
Getting Started
To use the SRM400, provide a stable DC supply between 6V and 10V and interface the bi-directional I/O pin to a microcontroller to trigger the transducer and measure the echo return time. Ensure the RC oscillator is calibrated to match the resonant frequency of your specific 40kHz ultrasonic transducer for optimal sensitivity.
Also Consider
Adafruit
- A more common, low-cost alternative for hobbyist projects requiring a 5V interface and up to 4m range.
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