It's an "optocoupler" relay module operating at 12 Volt. Does this mean that 12 V is galvanic isolated from the arduino, that should control the relays? My first impression was: I am missing a separate ground for the relay control and for the arduino! However, after some study I discovered that you CAN operate the board with galvanic isolated 12 V and the arduino's 5 V. How? Don't use the straps!! So don't connect the 4 middle pins with straps to Ground or to VCC of the relay module, but connect these 4 pins to the arduino's ground! Now the 12V and the arduino's 5V are galvanic isolated! See photo!

It's an "optocoupler" relay module operating at 12 Volt. Does this mean that 12 V is galvanic isolated from the arduino, that should control the relays? My first impression was: I am missing a separate ground for the relay control and for the arduino! However, after some study I discovered that you CAN operate the board with galvanic isolated 12 V and the arduino's 5 V. How? Don't use the straps!! So don't connect the 4 middle pins with straps to Ground or to VCC of the relay module, but connect these 4 pins to the arduino's ground! Now the 12V and the arduino's 5V are galvanic isolated! See photo!

It's an "optocoupler" relay module operating at 12 Volt. Does this mean that 12 V is galvanic isolated from the arduino, that should control the relays? My first impression was: I am missing a separate ground for the relay control and for the arduino! However, after some study I discovered that you CAN operate the board with galvanic isolated 12 V and the arduino's 5 V. How? Don't use the straps!! So don't connect the 4 middle pins with straps to Ground or to VCC of the relay module, but connect these 4 pins to the arduino's ground! Now the 12V and the arduino's 5V are galvanic isolated! See photo!

Az elem leírt és várt. Gyors szállítás és szolgáltatás a Banggoodtól :)

Item as deItem as described and expected. Fast delivery and service from Banggood :) Thanks

Az elem leírt és várt. Gyors szállítás és szolgáltatás a Banggoodtól :)

élelmiszer eladó

food seller

élelmiszer eladó

Ezek relé modulok nagy Arduino könnyen használható

These relay modules are great for Arduino easy to use

Ezek relé modulok nagy Arduino könnyen használható

Perfect!

Perfect!

Perfect!

Tökéletes!

Perfect!

Tökéletes!

very good!

very good!

very good!

Rendben. Rendben.

OK.

Rendben. Rendben.

nagyon praktikus relé rendszer, beállíthatja a különböző eszközöket anélkül, hogy sok áramkör

muy práctico sistema de relay, podre configurar diferentes dispositivos sin necesidad de tantos circuitos

nagyon praktikus relé rendszer, beállíthatja a különböző eszközöket anélkül, hogy sok áramkör

Thank you for the goods, I am very satisfied!

Thank you for the goods, I am very satisfied!

Thank you for the goods, I am very satisfied!