I am using the ADC DAC board to convert analog inputs from a wind speed meter.
This setup is very simple with Vdd and GND connecting to the wind speed meter and the signal and GND from the wind speed meter connected to the ADC DAC board.
I am seeing the following behaviour
1. When the input voltage is 0 the ADC output bounces around and never seemingly goes to 0. This is also observed with no input connected.
2. I seeing regular, but not period, jumps to 255 regardless of the input voltage.
Id like some advice on the best way to try and address this. Do I need some form of RC circuit on the input to hold the input for a little longer ?
I have nothing nothing connected to the ADC DAC boards 3.3v or GND inputs and the VDD is not shared between the board and the wind speed meter.
Any advice or guidance would be appreciated