SW 420 Vibration sensor module alarm Motion sensor module vibration switch SW-420 module based on the vibration sensor SW420 and Comparator LM393 to detect if there is any vibration beyond the threshold. The threshold can adjust using an onboard potentiometer. When this no vibration, this module output logic LOW the signal indicates LED light, and vice versa.

2 Channel Relay Module Relay Board Arduino Relay Module With Optocoupler allows a wide range of microcontrollers such as Arduino, AVR, PIC, ARM with digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs. 4–channel relay interface board and each channel need a 15-20mA driver current. It can be used to control various appliance

Hall Effect Sensors Module 3144 Hall switch integrated circuit based on Hall effect principle, the use of manufacturing semiconductor integrated technology of magnetic sensing circuit, it is by voltage adjusting device, Hall voltage generator, differential amplifier, Schmitt trigger, temperature compensation circuit, and an open collector output stage is composed of a magnetic sensing detection circuit. The input for the magnetic induction intensity, the output is a digital voltage signal.

Arduino Vibration Switch Module KY-002 Keyes allows detection of shock and vibration.

This is a 5V 4-channel relay interface board, and each channel needs a 15-20mA driver current. This 4-way relay module can be used to control various appliances and equipment with a large current. This four-channel relay module is equipped with high-current relays that work under AC250V 10A or DC30V 10A. 5 volts relay driver module has a standard interface that can be controlled directly by the microcontroller. This relay module board allows a wide range of microcontrollers such as Arduino, AVR, PIC, ARM with digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs.

HC-SR04 HC SR04 Ultrasonic Sensor also called HCSR04 Ultrasonic Range Finder. Ultrasonic Sensor module HCSR04 provides a 2cm – 400cm non-contact measurement function, the ranging accuracy can reach 3mm. The modules include ultrasonic transmitters, receivers, and control circuits.

1 Channel 5V Arduino Relay Module for Arduino PIC AVR DSP ARM. Single-channel relay, a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, and so on can control it. The 5V relay module circuit, each needs a 15mA-20mA driver current and is equipped with a high current relay: DC 30V / 10A, AC 250V / 10A. This one channel module has a standard interface that can be compatible with a microcontroller. This 5V Arduino relay module has on the high level and low level-triggered mode, friends who do not understand, have a look high-level trigger refers to the signal voltage between input and trigger, can be understood as a signal input with VCC cathode short-circuit triggered away. Low-level trigger refers to the signal voltage between the input terminal and Earth OV trigger, which can be understood as the signal input terminal and the GND negative electrode short circuit triggered away 1-channel relay module connection.