I have a relay connected to an Arduino Uno R4 WiFi, the relay is a SONGLE 5RD-05VDC-SL-C. I send HIGH from A0, and the LED on the relay lights up. However, nothing happens on the other side. Why?
Always show us a good schematic of your proposed circuit.
Show us good images of your ‘actual’ wiring.
Give links to components.
In the Arduino IDE, use Ctrl T or CMD T to format your code then copy the complete sketch.
Use the < CODE / > icon from the ‘posting menu’ to attach the copied sketch.
Well code has nothing to do with it, it works. Problem is that the relay does not switch.
Why argue?
Please supply the information requested, doing so doesn’t cost you a thing.
From what I can tell from the non posted schematic it is that thing that has the yellow paint crossing the green line and attached to the blue connector is sucking out to many electrons. Attaching it to the red should solve the problem.
If you don't know the answer don't answer. Thanks.
Read post #2 again! We are not interested in your top secret circuit but need the information to help you. If we did not need it we would not burn time asking.
That is the best answer you will get from me with all of that exacting detail you supplied!
My crystal ball is still in the dishwasher to see what is going wrong.
Are you trying to drive a 5 volt, 75 mA relay coil with a 3 volt output pin that can only pass a few mA?
I'm using the 5v output but I guess that it might be the problem? Should I use an external powersource for the relay? How many amps does it need to switch?
Would you make a drawing or show a picture of your project (devices, wires, power supply)?
See movie