🏭 Product Inventory Location: Germany
🔢 In Stock:
- 2 Units
🚚 We will ship your order within 24 hours after the order is taken.
🛒 Out of Stock? Pre-Order Now!
- Pre-Ordering: If an item is unavailable, you can pre-order it. We'll dispatch once stock is replenished, usually within 10 working days.
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- EU Countries Delivery Time: 4~8 working days.
- Other Countries Delivery Time: 2~2.5 weeks.
The OpenELAB relay shield has integrated a 4-channel 5V relay module, which is fully compatible with the UNO R3 control board. The 4-channel relay on the shield is active at HIGH level. Separately connect the 4-channel relay to the digital port 4, 5, 6, 7 on the UNO R3 board, then through controlling output HIGH or LOW to control the relay on and off.
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