Complete unit at a fair price

Complete unit at a fair price

4 Channel 5V Relay Module Relay module for Arduino TTL logic
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Customer Review

On the board is all it entails. The relays are provided with input drivers, drill holes at the corners provide for easy assembly. Only the terminals are likely not very many open / close operations to endure. But you can overlook at the price, they must be replaced for a electronics no effort.

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