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!

Artikel wie beschrieben und erwartet. Schnelle Lieferung und Service von Banggood :)

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

Artikel wie beschrieben und erwartet. Schnelle Lieferung und Service von Banggood :)

Lebensmittelverkäufer

food seller

Lebensmittelverkäufer

Diese Relais-Module sind ideal für Arduino einfach zu bedienen

These relay modules are great for Arduino easy to use

Diese Relais-Module sind ideal für Arduino einfach zu bedienen

Perfekt!

Perfect!

Perfekt!

Perfekt!

Perfect!

Perfekt!

sehr gut!

very good!

sehr gut!

OK.

OK.

OK.

sehr praktische Relais-System, können Sie verschiedene Geräte ohne die Notwendigkeit für so viele Schaltungen konfigurieren

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

sehr praktische Relais-System, können Sie verschiedene Geräte ohne die Notwendigkeit für so viele Schaltungen konfigurieren

Danke für die Ware, ich bin sehr zufrieden!

Thank you for the goods, I am very satisfied!

Danke für die Ware, ich bin sehr zufrieden!