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4 Relays Not Cycling After Sketch Upload—What’s Missing?

userHead Schultz.Langley 2024-07-25 10:43:26 266 Views1 Replies

I uploaded the first sketch to arduino, the 4 relays should be turned on and off every second, but nothing happened. What did I miss?

2025-07-25 10:43:54

It needs an external power supply to drive the xbee module and relays. Suggested: 7-12V.

 userHeadPic Schultz.Langley
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p.name 4 Channel Relay Shield for Arduino UNO DFR0144