1 way relay module 12V low level trigger expansion board | Инструменты

1 way relay module 12V low level trigger relay expansion board   product description:   1. This module complies with the safety standard, and the control area and the load area have isolation slots;   2, using relays;   3, with power and relay action instructions, the light is bright, disconnected and not bright;   4. When there is a signal at the signal input end, the common end and the normally open end will be turned on;   5, can be used as a microcontroller development board module, can be used as home appliance control;   6, control DC or AC signal, can control 220V AC load;   7. There is a normally open and a normally closed contact;   8. The blue KF301 terminal is more convenient to connect to the control line.   For the description of the high-level and low-level trigger modes, please do not understand the friends who do not understand:   High-level triggering refers to the triggering mode of voltage between the signal input terminal and the ground, which can be understood as a way to trigger the short circuit of the signal input terminal and the VCC positive terminal;   Low-level triggering refers to the triggering mode of the voltage between the signal input terminal and ground is OV, which can be understood as a way to trigger the short circuit between the signal input terminal and the GND negative terminal. 1 way relay module wiring