Hi all, I am having a few issues with a 4 channel relay not switching. The LED lights up indicating that the relay has switched, however it doesnt. No audible clicking noise to speak of and no power is coming through the normally closed loop. i have checked the motor and power setup and it runs fine when hard wired without the relay.
Its a different relay than I see on the forums and doesn't have some of the pins mentioned in the other relay troubleshooting posts.
The sketch is very simple just turning it on for 10secs then off for 10 secs. the Arduino is doing nothing else atm.
I have attached a pic of the user manual and how I have it wired up with a screenshot of the sketch beside.
Sorry the diagram was cut from the manual and modified. IN1 is indeed connected to pin 9.
Im starting to think the Arduino isn't suppling enough current to switch the circuit as the active relay LED lights up but the relay doesn't switch. The Arduino is powered via the 12v Jack with a 1.5A wall socket. i cant seem to find anything on how much voltage is required to make it switch as i could test this with the multimeter.
The manual mentions it can be powered via a 12v input but doesn't list what pins to use, only 5V. any ideas on powering with 12v?
You need a 5 V supply, the "barrel jack" or "Vin" is largely useless once you need to use other parts beyond the basic Arduino board itself.
If only using a couple of relays, you can use a USB "Phone charger" connected to the USB port, but for more relays, the 5 V supply rated at last one Amp (most current "Phone chargers" now are) with its output connected to the "5V" pin and
Paul__B:
You need a 5 V supply, the "barrel jack" or "Vin" is largely useless once you need to use other parts beyond the basic Arduino board itself.
If only using a couple of relays, you can use a USB "Phone charger" connected to the USB port, but for more relays, the 5 V supply rated at last one Amp (most current "Phone chargers" now are) with its output connected to the "5V" pin and
Thanks for the reply Paul.
Sorry are you able to clarify, are you saying i need to power the Arduino and the relay from separate sources?
I have tried different power sources for the Arduino (12v Jack, USB in apple phone charging block) but have always powered the relay through the Arduino.
Ok between the 2 manuals i have finally worked it out. Nightmare for a noob like me! Same issue as the other boards on the forum. needed higher voltage supplied, the jumper removed, and COM on the relay connected to the Arduino GND.
Thanks everyone, you put me on the right track to work it out. +Karma to all.
