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This PCBs used to control and monitoring industrial machine status monitoring. This project based on ESp8266 (12E/12F/7). This PCB has 3 power inputs. such as USB. single li-ion battery charging inclu...
more quality, more valuable with good service from PCBway.
The I2C Relay module is a modified relay module for the Arduino, NodeMCU, STM & etc. The new module can control relay over the I2C communication. Now user can control separately 8 relays with 2 wires....
my PCB collection from PCBWay
My First panel project. It is with good quality.