The Arduino 4 Relays Shield is a solution for driving high power loads that cannot be controlled by Arduino's digital IOs, due to the current and voltage limits of the controller. The Shield features four relays, each relay provides 2 pole changeover contacts (NO and NC); in order to increase the current limit of each output the 2 changeover contacts have been put in parallel. Four LEDs indicate the on/off state of each relay.
The Arduino 4 Relays shield is compatible with all the Arduino boards, 5V and also 3.3V standards. The shield doesn't need external power: it will be provided by the base board, through the 5V and 3.3V pins of the Arduino board used as base.
The relays are controlled by the following Arduino board pins:
Relay 1 = Arduino pin 4
Relay 2 = Arduino pin 7
Relay 3 = Arduino pin 8
Relay 4 = Arduino pin 12
The shield features several TinkerKit input/output and communication interfaces. Connecting TinkerKit modules can simplify the creation of a project or a prototype. The on-board connectors are :
2 TinkerKit Inputs: IN2 and IN3 (in white), these connectors are routed to the Arduino A2 and A3 analog input pins.
2 TinkerKit Outputs: OUT5 and OUT6 (in orange), these connectors are routed to the Arduino PWM outputs on pins 5 and 6.
2 TinkerKit I2C: these connectors (4-pin in white) are routed on the Arduino I2C interface. Both connect to the same I2C interface to allow you to create a chain of I2C devices.
Specification of Arduino 4 Relays Shield
- Thinker Kit interface: 2x I2C, 2x OUT, 2x IN
- Interfaces with Arduino Board: Digital I/O
- Relays: 4 (60W)
- Operating Voltage: 5 V
- Current needs: 140 mA (with all releays on, about 35 mA each)
- Operating Voltage: 5V
- Coil current consumption: 140 mA (with all releays on, about 35 mA each)
- Single pole chargeover contact maximum current: @ 30 V DC 2A
- Maximum load voltage: 48 V
- Maximum switching capacity: 60 W
- 1 x Arduino 4 Relays Shield
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