5V 16CHANNEL RELAY BOARD
With OPTO COUPLERS for each Relay
All 16 relays are individually driven by OPTO ISOLATOR chips. 2 nos ULN 2803 IC s used as drivers .
Power supply -
LED Indicators for Relay ON condition.
LOGIC LOW Relay ON .
Relay Contacts NO, NC, COMMON extended using individual screw terminals.
Relay coils back EMF protected with diodes.
Always make GND common while using with boards like Arduino.
Seperate power source required for Realay board. Do not power it from Arduino.