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Relay Shield 5V 4-Channel Relay Extension Board Module OPEN-SMART for Arduino – products that work with official Arduino boards

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                  Description:
                   
                  This Relay Shield utilizes four high-quality relays and provides NO/NC interfaces that control the load of high current. 
                  This means it could be a nice solution for controlling devices that couldn't be directly controlled by Arduino's Digital I/Os. A standardized shield form factor enables smoothly connection with the Arduino.
                  The shield also has four dynamic indicators show the on/off state of each relay.
                   
                  Features:
                   
                  1. Standard Shield interfaces and shape
                  2. Can continue to stack other expansion boards
                  3. M3 screw positioning holes for easy installation
                  4. High Drive (5V or 3.3V) normally open contact closure
                  5. Onboard relay indicator (red)

                  Specification:

                  Project Min Typical Max Unit
                  Supply Voltage 4.75 5 5.5 V
                  Power consumption (@ 5V) — — 180 mA
                  Opening and closing times per minute — — 30 Frequency
                  Maximum switching voltage per channel 125VAC/24VDC —
                  Maximum switching current per channel 3 A
                  Dimension  69X54X23 mm
                  Net Weight  43 g

                  Package includes:

                  1 x Relay Shield

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