A relay module is an electrically operated switch that is operated by an electromagnet. The relay module are operated by low power signals from microcontrollers. These modules provide electrical isolation between the controlling switch and the circuit being switched. Tomson Electronics has the finest collection of relay modules of different number of channel and voltage range. These relay modules can be easily interfaced with Arduino Boards , Raspberry Pi, NodeMCU. The relay modules are available at lowest price.
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