– February 3, 2017
how can i see the schematic diagram of this product ??
Your email address will not be published. Required fields are marked *
Your review *
Notify me of new posts by email.
The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do.
The PIR Sensor detects motion by measuring changes in the infrared (heat) levels emitted by surrounding objects.