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!

Produkt zgodny z opisem i oczekiwaniem. Szybka dostawa i obsługa od Banggood :)

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

Produkt zgodny z opisem i oczekiwaniem. Szybka dostawa i obsługa od Banggood :)

Sprzedawca żywności

food seller

Sprzedawca żywności

Te moduły przekaźnikowe są świetne dla Arduino łatwe w użyciu

These relay modules are great for Arduino easy to use

Te moduły przekaźnikowe są świetne dla Arduino łatwe w użyciu

Idealnie!

Perfect!

Idealnie!

Idealnie!

Perfect!

Idealnie!

Bardzo dobrze!

very good!

Bardzo dobrze!

Dobra, dobra.

OK.

Dobra, dobra.

Bardzo praktyczny system przekaźnikowy, można skonfigurować różne urządzenia bez potrzeby tak wielu obwodów

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

Bardzo praktyczny system przekaźnikowy, można skonfigurować różne urządzenia bez potrzeby tak wielu obwodów

Dziękuję za towar, jestem bardzo zadowolony!

Thank you for the goods, I am very satisfied!

Dziękuję za towar, jestem bardzo zadowolony!