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!

El artículo está descrito y esperado. Entrega rápida y servicio de Banggood :)

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

El artículo está descrito y esperado. Entrega rápida y servicio de Banggood :)

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food seller

vendedor de alimentos

Estos módulos de relé son ideales para Arduino fácil de usar

These relay modules are great for Arduino easy to use

Estos módulos de relé son ideales para Arduino fácil de usar

Perfecto!

Perfect!

Perfecto!

Perfecto!

Perfect!

Perfecto!

muy bien!

very good!

muy bien!

DE ACUERDO.

OK.

DE ACUERDO.

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

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

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

Gracias por los bienes, estoy muy satisfecho!

Thank you for the goods, I am very satisfied!

Gracias por los bienes, estoy muy satisfecho!