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Description
Product Description
4 Channel Low Level Relay Module without light coupling 5V
Note:
on the high level and low level-triggered mode, friends who do not understand, have a look: 1. 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 a way; 2. Low-level trigger refers to the signal voltage between the input terminal and Earth OV trigger, can be understood as the signal input terminal and the GND negative electrode short circuit triggered away 1-channel relay module connection
Package Includes: 1 x 4 Channel Low Level Relay Module without light coupling 5V
