Arduino Forum

Using Arduino => Motors, Mechanics, and Power => Topic started by: ProStreet1 on Jun 05, 2019, 05:54 pm

Title: Arduino UNO output info! PLEASE!
Post by: ProStreet1 on Jun 05, 2019, 05:54 pm
Does a Arduino UNO have enough output voltage and amperes to trip a standard automotive 12v dc relay?
If not what do I need to trip the relay.
I am looking to control multiple relays (4) that would carry higher volts and amps to control a 12 v dc motor.
If the UNO does not have that capability, what would you suggest?
Thank You!
Title: Re: Arduino UNO output info! PLEASE!
Post by: Robin2 on Jun 05, 2019, 06:13 pm
Does a Arduino UNO have enough output voltage and amperes to trip a standard automotive 12v dc relay?
It has neither the volts nor the amps. The max voltage from an Arduino I/O pin is 5v and the max safe current is about 20 milliamps.

You need to get the Arduino to switch a small transistor which, in turn, switches the 12v power for the relay coil.

...R
Title: Re: Arduino UNO output info! PLEASE!
Post by: larryd on Jun 05, 2019, 06:16 pm
There are many ways to drive a load with the Arduino.

Here are some examples:

(https://forum.arduino.cc/index.php?action=dlattach;topic=588494.0;attach=288418)