ELEGOO Optocoupler Module for Arduino and Raspberry Pi - Channel-Enhanced for Optimal Performance Review

Great relay boards, I just need to get my dog to stop opening Amazon packages first. I think she's so excited she forgets to sniff it first to see if it's a pack of treats or toys for her. As soon as she rips open the envelope or box and takes out what's inside, she seems to stop and sniff it, and if it's not her treat or toy, she stops. . Long story short, both of my 8 channel relay cards worked fine. I tested them, all 8 channels worked as expected. Before you write negative reviews about…

I just used it in a Raspberry PI project to control ceiling fans in the living room and bedroom. This module works very well when properly connected to the RPi. There is a lot of misinformation about this product and its counterparts. I measured the actual current draw based on my project and here are the facts: The current draw on a single 3.3V GPIO port to turn on the relay is only 0.47mA, not 16-20mA as in the specifications given. The maximum current draw for the RPi's GPIO port is 16mA, so

Great little board I'm using as a lighting controller with an Arduino serial remote + pcArduinoIDE codeconst int r1=10; //d-io 0-1 are tx/rxconst int r2 = 2;const int r3 = 3;const int r4 = 4;const int r5 = 5;const int r6 = 6;const int r7 = 7;const int r8 const int sr1 = 0;const int sr2 = 0;const int sr3 = 0;const int sr4 = 0;const int sr5 = 0;const int sr6 = 0;const int sr7 = 0;const int sr8 = 0 ;int incomingByte = 0;void setup(){Serial.begin(9600);pinMode (r1, OUTPUT);pinMode (r2…