This module consists of a mercury switch, a 680Ω resistor and a LED that will light up when tilt is detected. The mercury ball will open/close the circuit when the module is rotated.
Operating Voltage : 3.3V to 5.5V8
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The DC5V 2 Channels Relay Module is similar to the 4-channel version but with two relay channels. It is suitable for projects requiring the control of two separate high-power devices, providing a reliable interface between microcontrollers.
This relay module is 5V active low. It is a single channel relay interface board, which can be controlled directly by a wide range of microcontrollers such as Arduino, AVR, PIC, ARM, PLC, etc.
The HW-040 Rotary Encoder Module is a device that generates an electrical signal based on how much the rotary input device (knob) is rotated and the direction it is rotating
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