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!

Article tel que décrit et attendu. Livraison rapide et service de Banggood :)

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

Article tel que décrit et attendu. Livraison rapide et service de Banggood :)

vendeur de nourriture

food seller

vendeur de nourriture

Ces modules relais sont parfaits pour Arduino facile à utiliser

These relay modules are great for Arduino easy to use

Ces modules relais sont parfaits pour Arduino facile à utiliser

Parfait!

Perfect!

Parfait!

Parfait!

Perfect!

Parfait!

très bon!

very good!

très bon!

D'ACCORD.

OK.

D'ACCORD.

système de relais très pratique, vous pouvez configurer différents appareils sans avoir besoin d'autant de circuits

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

système de relais très pratique, vous pouvez configurer différents appareils sans avoir besoin d'autant de circuits

Merci pour la marchandise, je suis très satisfait!

Thank you for the goods, I am very satisfied!

Merci pour la marchandise, je suis très satisfait!