Overview
The board has four relays driven by ULN2803 IC.
The board works on 12V but the input signal can come directly from
microcontroller output working at 3V or 5V to control relays. Each relay can
switch varierty of AC or DC high voltage, high current loads working at 110V or
220V AC mains like lights, fans, motors and such. The status of relay is
indicated by individual LEDs.
4 RELAY INTERFACING:
Features
- LED indication for relay & power supply.
- Design based on highly proven IC ULN2803 as driver.
- Direct input from 3-5V micro-controller for relay control.
- High Current (8A) Capability.
- AC or DC Operating Voltages.
- No Leakage Current.
- Eliminates costly isolation relays and wiring.
ATMEL SCHEMATIC:
FOR CODE CLICK HERE.
PIC SCHEMATIC:
FOR PIC CODE CLICK HERE
