The Arduino 4 Relays shield is designed as a solution for driving those high power loads that cannot be driven by Arduino's digital IOs due to current and voltage limits. The shield features 4x relays, with each relay providing 2 pole changeover contacts (NO and NC). The 2 changeover contacts have been put in parallel in order to increase output current limits. 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 pin12 * Compatible with all Arduino boards, 5V and 3.3V * 4x Status LEDs * Power provided by base board * Operating voltage 5V * Maximum switching capacity 60W * 6x TinkerKit IO interfaces https://elecena.pl/product/27276352/arduino-4-relay-shield-a000110 2024-11-14 https://elecena.pl/product/27276352/arduino-4-relay-shield-a000110 2025-04-10 https://elecena.pl/product/27276352/arduino-4-relay-shield-a000110 2025-06-17 https://elecena.pl/product/27276352/arduino-4-relay-shield-a000110 2025-09-04 https://elecena.pl/product/27276352/arduino-4-relay-shield-a000110 2026-03-25 https://elecena.pl/product/27276352/arduino-4-relay-shield-a000110 2026-04-17