Rboard is a unique Arduino board which features 4 channels isolated relays, an XBee socket (xbee available separately ), and an ATMega328. This board will add relay control as well as wireless connectivity to your projects. It’s great for anything from home automation to robot control. The possibilities are endless!

PCB size 78.74mm X 106.08mm X 1.6mm

Power supply 7~12V DC

Microprocessor Atmega328

Communication Interface XBee, nRF24L01+, UART

Pin Map List

Pin of Arduino Description

D0 RxD

D1 TxD

D2 Xbee Reset

D3 nRF24L01+_IRQ

D4 R0

D5 R1

D6 R2

D7 R3

D8 nRF24L01+_CE

D9 nRF24L01+_CS

D10 SD_CS

D11 SPI_MOSI

D12 SPI_MISO

D13 SPI_SCK

A0 AD0

A1 AD1

A2 AD2

A3 AD3

A4 AD4/IIC_SDA

4 channel relays with photocouple isolated, Micro-SD Socket, XBee interface, nRF24L01+ interface, many analog/digital electronic brick interfaces and so on, many interfaces are designed and broke out for many projects as wireless communication, mass storage, digital control and signal sample.

PWR_EXT Setting

Rboard is designed for isolating industrial application with external power supply. So when remove the jumpers on PWR_EXT, use the DC 7-12 terminal to for ATMega328 and all digital circuit power supply, and supply the 5V relay by the PWR_EXT terminal with 5V, there are 2 completely isolated power systems for controller part and relay part.

If you don't need so stringent electrical isolation, put the jumpers on PWR_EXT, then you don't need an extra power supply, the relays will supply by the DC 7-12 terminal the same as controller part - but there also the opto-isolation between the relay and controller I/Os.