I have this ADXL345 Which has 5V 3V3 and VS instead of VCC as the one in the Sparkfun guide . So how should I connect it to a regular 5V Nano?
Try connecting 5V, GND, SDA, SCL as usual.
jremington:
Try connecting 5V, GND, SDA, SCL as usual.
Do you mean 5V instead of VCC?
Connect "5V" on the sensor to "5V" on the Arduino
jremington:
Connect "5V" on the sensor to "5V" on the Arduino
So it is 5V tolerant? Can skip the pullup resistors and the level regulators that are usually needed?
The SENSOR is certainly not 5V tolerant.
Don't buy undocumented modules, unless you are willing to sacrifice a few, trying to figure out how they work.
Thanks for the help. I am really a beginner.
is there's a way to recognize 5V tolerance - I guess you would see a level shifter on the board. This part seems to have exactly the same structure board but is described as "Support 5V/3.3V voltage input". Or maybe also this one isn't 5V tolerant?
The link leads to a log in screen.
If the board has level shifters, it will most likely be using tiny MOSFETs, with a resistor on source and drain. You will have to reverse engineer it to be sure.
It is silly for a beginner to buy undocumented parts from Ali Express, just because they are a few pennies cheaper. You get zero support, and possibly counterfeit, used or rejected chips to boot. Complete waste of time and money!
Got it. Maybe do you have a link for a serious 5v tolerant ADXL345?
Adafruit, among others, sells an ADXL345 module with level shifters built in.
There is nothing special about the ADXL345, though.