I am doing a school project and we dissagree about if we can supply the arduino uno with a power supply of 12V because we bricked a arduino earlier. They say it will brick again but on the package it says "Voltage 7-12V" so I say it sould not matter if we supply 12 volt and arduino make it to 5V output... Can we use the 12V powersupply or am I wrong?
For example if i connect the displacement Sensor to GND and A0?
what do you mean by that?
Yes, you can use a 12V power supply to power the Arduino. I've been doing this for years without issue.
The Arduino will use this to create its own 5V power on the board that is connected to the 5V pin that you can use to power your sensor.
Pat.
Hi,
yes, you can power the arduino, (some models), with 12V,
but bear in mind that when supplying 12V, there will be a voltage drop of 7V across the regulator, (LM7805 on some models). Since the regulator can supply up to 1A, it can generate 7W of heat.
This could damage the regulator.
So you can power it with 12V, but if there is consumption beyond the arduino itself, (modules connected to the +5V of the arduino), keep in mind that the regulator could heat up a lot.
In this case, a palliative solution would be to use a heatsink in the regulator.
You can use 12V, but as noted above, things are likely to get hot. Better to power it via USB, especially as many households tend to end up with a plethora of old phone chargers you can use for the purpose.
... yes, but still a waste of energy and affixing a good heatsink is awkward as they are bulky.
A DC-DC buck converter between 12V source and Arduino is a solution to consider but does add costs.
Not a recommendation to purchase (example only):
Amazon.com : dc to dc buck converter
Some may have an issue with "adjustable" and other than cost it does add another point of failure.
But, bypassing the Arduino linear regulator with a stable 5V from the buck converter improves efficiency overall.
You CANNOT apply more than 5 V to any pin other than Vin!
What is "the displacement Sensor"?
It's unlikely that overloading the voltage regulator results in a bricked Arduino. It's more likely that incorrect wiring or a faulty device that carries 12V damaged the TTL-to-USB converter or the 328P.
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