This questions is about the Particle Electron Asset Tracker shield.
Am I able to connect the car battery directly to the Electron 12VDC terminal (blue terminal). See image below. I read the spec for the shield and it says 5 to 12 VDC.
Recognizing that the the car battery voltage is any where between 13.7 to 14.7VDC when the vehicle is running, and is usually above 12.6VDC.
If it cannot be connected to the car battery, is there other suggestions that I can employ? Maybe a buck convert or additional battery perhaps?
I wouldn’t directly connect it.
The nominal voltage range of the car battery is your least concern - you should be much more concerned about the transient voltage spikes during cranking which can go much higher.
I bought the hardware you recommended and it did not work. We were applying 12.57VDC using the car battery as an input to the step-down module and the output we were getting is 0VDC.
The step-down module is right out of the box.
Any idea what we are doing wrong here?