[discontinued] 2/4/8-Channel 5V Relay Module

DESCRIPTION 2 Channel 5V Relay Module  5V 2-Channel Relay interface board and each one needs 15-20mA Driver Current  Equipped with high-current relay, AC250V 10A ; DC30V 10A Standard interface that can be controlled directly by microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic)   Indication LED’s for Relay output status It activates on low level 4 Channel 5V Relay Module 5V 4-Channel Relay interface board and each one needs 15-20mA Driver Current Equipped Equipped with high-current relay, AC250V 10A ; DC30V 10A Standard interface that can be controlled directly by microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic active low) Opto-isolated inputs Indication LED’s for Relay output status 8 Channel 5V Relay Module A Relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate the switch and provide electrical isolation between two circuits.   This 8 channel 5V relay has both optical and magnetic i