I'm using a arduino due in a project and need to know the operating voltage to give it. I checked the online datasheet which said something like: note! unlike most arduino boards, the due runs off a strict 3.3v (compared to the usual 5v). it then goes on to say that you can plug it into any usb port. Usbs deliver 5 volts. I dont want to blow up my board so could someone tell me what it actually is?
You can also power the Due with 12volt on the DC socket.
That doesn't make it a 12volt processor.
Every Arduino has a built-in voltage regulator that drops supply voltage to the voltage that the MCU runs on. The Due has a 3.3volt chip and a 3.3volt voltage regulator between USB and MCU.
Being a 3.3volt Arduino, all your I/O (sensors) must be 3.3volt-logic.
Leo..
That "Unlike most Arduino boards, the Arduino Due board runs at 3.3V." statement is getting a bit long in the tooth.
At least in terms of the product lines sold by Arduino, 3.3 V has been in the majority for years.
In terms of the numbers of boards in use by Arduino users, 5 V might still be in the lead, but the percentage of 3.3 V boards in use is surely increasing steadily.
Although I have quite a few of the boards, I don't end up using them much. The Wi-Fi capabilities are not really of interest to me. If you remove the Wi-Fi capabilities from consideration the ESP8266 loses some of its edge over other alternatives.
The ESP32 is more capable even outside the Wi-Fi domain, but somehow hasn't grabbed my attention.
But that is only me. The ESP chips have certainly been hugely popular in the Arduino world, and their introduction may well have been the tipping point in the 5 V vs 3.3 V competition.
I'm still very much a fan of the AVR line. For applications that need a bit more horsepower, the ATSAMD21G18 boards have served me well enough.
Thanks for all the replies, guys, In regard to the esps Iām still a beginner in arduino and therefore prefer to use more analog board such as ones with the atmegas. I appreciate the discussion though!
The problem is not so much the power supply - as already described there are regulators on the board - but the IO pins. As @jremington already wrote, 3.3V boards usually tolerate only max. 3.3V at the input pins and deliver also only 3.3V at the outputs. This has to be considered when designing the circuit. You can destroy the chip quickly if you don't pay attention to this.
hi all, sorry to bring this back up but i just got the due and noticed that there is a 5v output pin! do i just have a newer version of the board or does this have some catch to it?