Aruino Amperage

Other Hardware General Electronics
21

You may have destroyed the Uno already with the improper connections. Post an image of the thing all wired up

Did you remove the jumper on the relay module so that the relay module will use the external power supply?

Is the relay module coils rated for 24V?

Eight-Channel Relay Module Specifications

  • Supply voltage – 3.75V to 6V
  • Trigger current – 5mA
  • Current when relay is active - ~70mA (single), ~600mA (all eight)
  • Relay maximum contact voltage – 250VAC, 30VDC
  • Relay maximum current – 10A

The maximum relay module operating volts is 6 volts. 24V exceeds the maximum realy modules operating V's.

22

Can confirm the Arduino is still ok (barely). I have a mega to use if it does die.

The relay contact voltage is designed for 30V so that should be fine.

Here is a photo of it all together.

setup
setup1920×2560 449 KB

Sorry about the clarity

23

yes the relay contact V's are high but how are the relay coils supplied? A better image of the relay wires would be nice. The relay coils are limited to 6V max.

Is that not a MEGA shown in the image of post#22?

24

I have a 24v power supply working on the relays. When apply the triggering power (5v 5mA) the relay will output 24v so the concept is all working which is what drew me to the idea that it was a problem in the arduino.

25

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26

I don't see any 24V power to the relay board. It's required, to operate the relay coils that are rated for 24V. The relays are clearly marked "24V".

Did you make the classic mistake of assuming that the relay coil voltage specification applies to the relay contact side (the controlled side NO/NC/COMMON)?

27

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