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The board works fine when I have the wall-wart turned. However, I sometimes accidentally turn off the wall-wart and then it's powered by usb. Usb power does not work the relays, wh... FAQDFR0144SEO FAQAftersales FAQ
JaneYu 2026-02-14 08:57:05 1230 Views
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Shield Requires Both 9V and USB Power—Is This Correct? FAQDFR0144Aftersales FAQSEO FAQ
Schultz.Langley 2025-07-24 10:45:29 443 Views
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Can Arduino with Relay Shield v2.1 read XBee digital I/O? Is a logic level converter needed? FAQDFR0144Aftersales FAQSEO FAQ Schultz.Langley 2024-07-25 11:12:07 419 Views
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Is it possible to use Arduino D4 to control Relay 1? FAQDFR0144Aftersales FAQSEO FAQ Schultz.Langley 2024-07-25 10:48:12 528 Views
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4 Relays Not Cycling After Sketch Upload—What’s Missing? FAQDFR0144Aftersales FAQSEO FAQ Schultz.Langley 2024-07-25 10:43:54 71 Views
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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? DFR0144FAQAftersales FAQ Yx 2024-07-12 15:04:05 68 Views
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Can the Arduino read the digital I/O pin status of an XBee using the relay shield v2.1, considering XBee's 3.3V logic level? DFR0144FAQAftersales FAQ Yx 2024-07-12 15:04:05 Trending
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- 3 DFPlayer Mini - Really low volume, almost non-existent
- 4 DFPlayer - How to avoid pauses beteween tracks
- 5 New to DFPlayer (detect when audio clip has finished playing & loud pop upon power on/down)
- 6 DFPlayer mini + gets stuck in loop when it shouldnt.
- 7 Very disappointing support for TEL0117 LoRa MESH Radio Module - 868MHz
- 8 Wiring Connections to the DFPlayer Mini MP3
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- 10 Beetle ESP32 C3 USB connection issue