8 Channel DC 5V DC 230V Relay Module Control Board with Optocoupler for UNO R3 MEGA 2560 1280 DSP ARM PIC AVR TTL Logic STM32 Raspberry Pi

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Please note: if you use this device, you must output a LOW signal from your microprocessor in order to turn the relay ON. Outputting a HIGH signal from your microcontroller will turn the relay OFF.Your output pin connected to the relay control input must be able to sink 13 milliamps. Note that turning on all eight relays may cause your microcontroller device to sink more current than it can safely handle. Check your spec sheets. Usually, because the voltage drop is very low, sinking the current does not cause much power dissipation (heat)... which is usually the culprit in these kinds of device overload situations. But, check just to be sure, what the maximum simultaneous output sink current capability is.

The product works just as intended. Everything was good except the board itself did arrive with scratches on minor imerfections on it. Apart from that, everything that I expected and wanted.

All scratched up.. from my analysis they stack these on top of each other and the solder joints on the bottom are what gouged this board..

It works but I need to learn how to use it

Unbelievable quality for the price. It was easy to integrate into the project I was building. Works flawlessly. I will be using many more.