Hi there, I'm looking to control a 24VDC device for electro cup suction using an Arduino Uno in a wall climbing robot, however the output signal of the Uno is 5V. I'm not a professional in electrical concepts, but I read something about using a relay module to control the device (link below). Do I have to provide an external 24V power source, if so what kind of supply can I implement? If I were to use a relay, am I able to control multiple devices for the suction cup ? Here are links:
Relay Module Tutorial
Relay Module Board
EC40 Electric Vacuum Cup Datasheet
Thanks for the help.
Going to be an interesting device you are making. Note the 50% duty cycle. if the device is sucking for 15 seconds, then it must be off for the next 15 seconds.
Each devices needs 1/2 amp at 24 volts. I presume at some point, all 4 devices will be sucking, so 4 times 1/2 amp means you need a 24 volt supply capable of more than 2 amps, preferable 3-4 amps.
You can certainly implement this with relays, but so much easier to use a single MOSFET for each suction device. Schematics for how to connect them to an Arduino pin are available and likely someone will post one right on this thread for you.
You may be tempted to power a relay directly from an Arduino. Don't. It is a sure way to destroy the Arduino or at least lessen its life expectancy.
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