My first time using an Arduino UNO, and unluckily it is not showing up in my Device Manager, so I'm scared that it's dead. The first time I plugged it in with the USB my circuit prepared I sensed a little weird odor, but the LEDs of the components such as the MQ-2 sensor, and those of the Arduino UNO kept working properly (the Arduino had an orange LED blink sketch pre-installed it seems), so did I damage anything that the Arduino board became dead? Here is the circuit:
Not getting recognized by my computer can possibly have other reasons but I just wanted to check off this one just in case it's where the problem is from.
Devices like an MQ sensor, motor or servo may not be powered from the Arduino 5V pin, as that can under certain circumstances burn out the on board regulator. AVOID the many bad tutorials that suggest otherwise.
Remove the sensor and check if the Arduino will still load the Blink sketch.
I did double check, it is 5V. Thanks for the tip though! That's a thing to watch out for in the future.
Remove the sensor and check if the Arduino will still load the Blink sketch.
so yeah about this, it does still load the Blink sketch, what does that guarantee? Does it mean the Arduino is 100% ay ok, or could there be other issues but the Arduino can still just run the Blink sketch? For example some parts may be damaged, the pins, etc.
Thanks a lot for the confirmation! That must be the source of the smell then, and not some short circuit or something (because it did smell funny, and I never smelled a short circuit before, but if I were to give an opinion it didn't smell like something burning). The bigger problem is from either the cable or my computer then.
Maybe, but it surely won't work of you try to power the Arduino via the barrel jack. In the future power the MQ sensor separately, and connect the grounds.
