Processing and quality is very good

Processing and quality is very good

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

The price is worth his build. The workmanship is very good. Separation of 230 leading parts executed with sufficient distance (air).

Note:

It come optocouplers for use but the coils of the relays are not galvanically separated from the control input (GND).
A conversion is possible.

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