26 - 09 - 2022

Relay boards

2 relay controller:

The board has two digital inputs Rel1, Rel2 , which can be controlled by Digital output 3.3V or 5.0V.

Every input can turn On/Off the corresponding relay on the board. The especially of the board is, that when the relay is Turn ON, the corresponding connector output of the board gets 12V (the output is not normal closed contact!!!), so the board can directly control some 12V load.


The board has two 12V power supply connectors, which are connected in parallel, so a few boards can be connected cascade if is needed:


The board characteristics are:

  • Power supply: 12V
  • Used relay: Omron G6D-1A-ASI-DC12
  • Relay contact current: 5A


One load relay board 8A

The board has one Load relay with two connectors.


If 12V are connected to the left board connector, the relay will Turn ON. The right connector has three screws:

  • COM – common;
  • NC – normal closed contact;
  • NO – normal open contact;

The used relay is Omron G2RL-2 DC12, with max to 8A current of the contacts. Using this board, we can control easy a remote load.