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Arduino to control 3V remote Answered


I have a remote that I'm trying to drive with an arduino.  The remote usually uses a 3V CR2032 battery.  I tried just using the 5V digital pin set on high, but that didn't work.  Then I tried using a L293D motor driver -- with the lithium battery supplying the outside power.  That didn't work either.

Any ideas?



2 years ago

My best idea is that you have no clue what you are doing.
Using 5V for a device that runs on only 3V - WHY??
Using logic output that might be good for a LED to drive a load directly that might use far more power than even multiple LED`s - WHY??
A motor driver as a switch/power supply for a normal load - WHY?
There is a reason why people use transistors on the outputs or connect a motor to a motor driver, think about it and you might see why...


Reply 2 years ago

Thanks downunder -- real helpful. Why did you even bother to reply --WHY???


Reply 2 years ago

I replied to show that your way of doing it won't work so others won't make the same mistake.
Check the Arduino playground how to use transistors to switch and control loads.
And if you also check Google how to use a 3V voltage regulator you might even get the idea to combine both to make it work.

People these days often think a microcontroller will always do what they want them to do, the reality is often far from it.
If you really want to learn more then spend some time in the Arduino playground, I still go there to get example code and ideas....