Analog input MAX Vin ?

Other Hardware Motors, Mechanics, Power and CNC
1

Hello,
I'm planing to read voltage level from a solar panel (~16.5 V max) and process it using arduino UNO.

Is that voltage (16.5 V) would be fine for analog input or it's too much ?

Thanks.

2

The voltage on Analog In cannot exceed 3.3 or 5 V, depending on which Arduino you have and how it is powered.

Use a resistive voltage divider to reduce the voltage to within that range. For example, a 5K ohm resistor and a 1Kohm resistor will divide the input voltage by about 6 (taking into account the tolerance in the resistor values). You can calibrate the system after construction by comparing the analog readings you get with measurements using an accurate multimeter.