I have a project, where I use an Arduino UNO.
Currently the arduino is powered with 12V.
There are two components connected to the arduino which consume relatively much power.
b) MQ-8 hydrogen sensor
I have measured the ESP, it consumes about 80mA @ 3,3V (I have a 3,3 V voltage regulator)
I have calculated the MQ-8 sensor - it should consume around 180mA…
Somewhere I have read, that the maximum current that the voltage regulator of the arduino can deliver is Imax < 1W / (Vin - 5V)
Which in my case would be 142mA…
This would mean, that it could handle the ESP, however ESP + MQ-8 sensor is to much…
Is it possible, advisible to buy a 5V power supply and connect it directly to GND and 5V of the Arduino, in order to bypass the voltage regulator?
Is it better to buy a 6V power supply and use it with the voltage regulator.
If I use a 6V power supply the voltage regulator should be able to deliver up to 1A… This would be more than sufficient to run the ESP and the MQ-8…
Thanks for your Inpit.