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!

Προϊόν όπως περιγράφεται και αναμενόταν. Γρήγορη παράδοση και υπηρεσία από την Banggood :)

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

Προϊόν όπως περιγράφεται και αναμενόταν. Γρήγορη παράδοση και υπηρεσία από την Banggood :)

πωλητής τροφίμων

food seller

πωλητής τροφίμων

Αυτές οι μονάδες αναμετάδοσης είναι καλές για τον Arduino που είναι εύκολο να τις χρησιμοποιήσει

These relay modules are great for Arduino easy to use

Αυτές οι μονάδες αναμετάδοσης είναι καλές για τον Arduino που είναι εύκολο να τις χρησιμοποιήσει

Perfect!

Perfect!

Perfect!

Τέλεια!

Perfect!

Τέλεια!

very good!

very good!

very good!

OK.

OK.

OK.

πολύ πρακτικό σύστημα ρελέ, μπορείς να ρυθμίσεις διαφορετικές συσκευές χωρίς την ανάγκη για τόσα πολλά κυκλώματα

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

πολύ πρακτικό σύστημα ρελέ, μπορείς να ρυθμίσεις διαφορετικές συσκευές χωρίς την ανάγκη για τόσα πολλά κυκλώματα

Thank you for the goods, I am very satisfied!

Thank you for the goods, I am very satisfied!

Thank you for the goods, I am very satisfied!