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!

Товар, как описано и ожидалось. Быстрая доставка и обслуживание от Banggood :)

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

Товар, как описано и ожидалось. Быстрая доставка и обслуживание от Banggood :)

Продавец еды

food seller

Продавец еды

Эти релейные модули отлично подходят для Arduino в использовании

These relay modules are great for Arduino easy to use

Эти релейные модули отлично подходят для Arduino в использовании

Отлично!

Perfect!

Отлично!

Отлично!

Perfect!

Отлично!

Очень хорошо!

very good!

Очень хорошо!

Хорошо. Хорошо.

OK.

Хорошо. Хорошо.

очень практичная релейная система, вы можете настроить различные устройства без необходимости в так много схем

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

очень практичная релейная система, вы можете настроить различные устройства без необходимости в так много схем

Спасибо за товар, я очень довольна!

Thank you for the goods, I am very satisfied!

Спасибо за товар, я очень довольна!